diff --git a/A2Mac.xcodeproj/project.pbxproj b/A2Mac.xcodeproj/project.pbxproj
index 1c0691a..7441aed 100644
--- a/A2Mac.xcodeproj/project.pbxproj
+++ b/A2Mac.xcodeproj/project.pbxproj
@@ -84,7 +84,10 @@
 		32439F8622ECD8AD0077AAE0 /* common.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = common.h; sourceTree = "<group>"; };
 		3264261023284F6F008B615F /* Apple2_mmio_8bit_ioaddr.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Apple2_mmio_8bit_ioaddr.h; sourceTree = "<group>"; };
 		326426112328ADF4008B615F /* Apple_II_ROM.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = Apple_II_ROM.s; sourceTree = "<group>"; };
+		326C50802383CC0B00A05420 /* woz.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = woz.h; sourceTree = "<group>"; };
 		326ED2EE232D7A0000A41337 /* 6502_functional_test.bin */ = {isa = PBXFileReference; lastKnownFileType = archive.macbinary; path = 6502_functional_test.bin; sourceTree = SOURCE_ROOT; };
+		32B18435233F10BC00DBB4AB /* Shaders.metal */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.metal; path = Shaders.metal; sourceTree = "<group>"; };
+		32B18438233FAB3900DBB4AB /* verticies.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = verticies.swift; sourceTree = "<group>"; };
 		32BFFB5722EACC630003B53F /* A2Mac.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = A2Mac.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		32BFFB5A22EACC630003B53F /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		32BFFB5C22EACC630003B53F /* ViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ViewController.swift; sourceTree = "<group>"; };
@@ -204,11 +207,13 @@
 				32DBF76723373FB400DD50E7 /* disassembler.h */,
 				32439F8422ECD8AD0077AAE0 /* apple.rom */,
 				326ED2EE232D7A0000A41337 /* 6502_functional_test.bin */,
+				32B18438233FAB3900DBB4AB /* verticies.swift */,
 				32439F7322ECD8AD0077AAE0 /* Apple2_mmio.h */,
 				3264261023284F6F008B615F /* Apple2_mmio_8bit_ioaddr.h */,
 				32439F8622ECD8AD0077AAE0 /* common.h */,
 				32BFFB5A22EACC630003B53F /* AppDelegate.swift */,
 				32BFFB5C22EACC630003B53F /* ViewController.swift */,
+				32B18435233F10BC00DBB4AB /* Shaders.metal */,
 				32C4532D233345420000EBA1 /* MonitorView.swift */,
 				32DBF7632334657900DD50E7 /* HiRes.swift */,
 				32C453072331C0910000EBA1 /* NSLayoutManager-Extension.swift */,
@@ -219,6 +224,7 @@
 				32BFFB6322EACC660003B53F /* Info.plist */,
 				32BFFB6422EACC660003B53F /* A2Mac.entitlements */,
 				32439F7222ECD8AC0077AAE0 /* A2Mac-Bridging-Header.h */,
+				326C50802383CC0B00A05420 /* woz.h */,
 			);
 			path = A2Mac;
 			sourceTree = "<group>";
@@ -338,7 +344,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 1020;
-				LastUpgradeCheck = 1020;
+				LastUpgradeCheck = 1100;
 				ORGANIZATIONNAME = GameAlloy;
 				TargetAttributes = {
 					32BFFB5622EACC630003B53F = {
@@ -634,6 +640,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = A2Mac/A2Mac.entitlements;
+				CODE_SIGN_IDENTITY = "-";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_TEAM = W6TFQTZ4DA;
@@ -643,8 +650,11 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				OTHER_CFLAGS = "";
-				OTHER_SWIFT_FLAGS = "";
+				OTHER_CFLAGS = (
+					"-DDISASSEMBLER",
+					"-DINTERRUPR_CHECK_PER_STEP",
+				);
+				OTHER_SWIFT_FLAGS = "-D_NO_HIRES -D_NO_HIRESDRAW -D_NO_HIRESLOW";
 				PRODUCT_BUNDLE_IDENTIFIER = com.gamealloy.A2Mac;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
@@ -660,6 +670,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = A2Mac/A2Mac.entitlements;
+				CODE_SIGN_IDENTITY = "-";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_TEAM = W6TFQTZ4DA;
@@ -670,7 +681,11 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				OTHER_CFLAGS = "";
+				OTHER_CFLAGS = (
+					"-DDISASSEMBLER",
+					"-DINTERRUPR_CHECK_PER_STEP",
+				);
+				OTHER_SWIFT_FLAGS = "-D_NO_HIRES -D_NO_HIRESDRAW -D_NO_HIRESLOW";
 				PRODUCT_BUNDLE_IDENTIFIER = com.gamealloy.A2Mac;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "A2Mac/A2Mac-Bridging-Header.h";
@@ -766,6 +781,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = A2Mac/A2Mac.entitlements;
+				CODE_SIGN_IDENTITY = "-";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_TEAM = W6TFQTZ4DA;
@@ -792,6 +808,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = A2Mac/A2Mac.entitlements;
+				CODE_SIGN_IDENTITY = "-";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_TEAM = W6TFQTZ4DA;
@@ -817,6 +834,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = A2Mac/A2Mac.entitlements;
+				CODE_SIGN_IDENTITY = "-";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_TEAM = W6TFQTZ4DA;
@@ -843,6 +861,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = A2Mac/A2Mac.entitlements;
+				CODE_SIGN_IDENTITY = "-";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_TEAM = W6TFQTZ4DA;
diff --git a/A2Mac/6502.c b/A2Mac/6502.c
index 1c085ed..44ce429 100644
--- a/A2Mac/6502.c
+++ b/A2Mac/6502.c
@@ -12,6 +12,21 @@
 #include <unistd.h>
 #include <string.h>
 #include <time.h>
+#include "woz.h"
+
+#define WOZ1_MAGIC  0x315A4F57
+#define WOZ2_MAGIC  0x325A4F57
+#define WOZ_INFO_CHUNK_ID  0x4F464E49
+#define WOZ_TMAP_CHUNK_ID  0x50414D54
+#define WOZ_TRKS_CHUNK_ID  0x534B5254
+#define WOZ_META_CHUNK_ID  0x4154454D
+
+woz_header_t woz_header;
+woz_chunk_header_t woz_chunk_header;
+woz_tmap_t woz_tmap;
+woz_trks_t woz_trks;
+
+uint16_t trackOffset = 0;
 
 #ifdef DEBUG
 #define INLINE
@@ -28,7 +43,7 @@
 #define RESET_VECTOR        0xFFFC
 #define IRQ_VECTOR          0xFFFE
 
-const unsigned long long int iterations = 100*G;
+const unsigned long long int iterations = G;
 unsigned long long int inst_cnt = 0;
 
 const unsigned int fps = 30;
@@ -46,7 +61,24 @@ INLINE unsigned long long rdtsc(void)
 }
 
 
-m6502_t m6502 = { 0, 0, 0, 0, 0, 0, 0, NO_DEBUG, HLT };
+m6502_t m6502 = {
+    0,      // A
+    0,      // X
+    0,      // Y
+    0,      // SR
+    0,      // PC
+    0,      // SP
+    0,      // clk
+    0,      // trace
+    0,      // step
+    0,      // brk
+    0,      // rts
+    0,      // bra
+    0,      // bra_true
+    0,      // bra_false
+    0,      // compile
+    HLT     // IF
+};
 
 disassembly_t disassembly;
 
@@ -54,6 +86,62 @@ disassembly_t disassembly;
 #include "Apple2_mmio.h"
 
 
+uint16_t videoShadow [0x1000];
+uint32_t videoMem [0x2000];
+uint32_t * videoMemPtr = videoMem;
+
+uint16_t HiResLineAddrTbl [0x2000];
+
+void initHiResLineAddresses() {
+    uint16_t i = 0;
+    for ( uint16_t x = 0; x <= 0x50; x+= 0x28 ) {
+        for ( uint16_t y = 0; y <= 0x380; y += 0x80 ) {
+            for ( uint16_t z = 0; z <= 0x1C00; z += 0x400) {
+                HiResLineAddrTbl[i++] = x + y + z;
+            }
+        }
+    }
+}
+
+
+typedef struct {
+    uint8_t L;
+    uint8_t H;
+} bytes_t;
+
+void hires_Update () {
+    // lines
+    int videoMemIndex = 0;
+    for( int y = 0; y < 192; y++ ) {
+        // 16 bit blocks of columns
+        for ( int x = 0; x < 20; x++ ) {
+            // odd
+            bytes_t block = * (bytes_t*)(& RAM[ HiResLineAddrTbl[y * 20] + x * 2 ]);
+            for ( uint8_t bit = 0; bit < 7; bit++ ) {
+                uint8_t bitMask = 1 << bit;
+                
+                if (block.L & bitMask) {
+                    videoMem[videoMemIndex++] = 0x7F12A208;
+                }
+                else { // 28CD41
+                    videoMem[videoMemIndex++] = 0x00000000;
+                }
+            }
+            // even
+            for ( uint8_t bit = 0; bit < 7; bit++ ) {
+                uint8_t bitMask = 1 << bit;
+                
+                if (block.H & bitMask) {
+                    videoMem[videoMemIndex++] = 0x7F12A208;
+                }
+                else { // 28CD41
+                    videoMem[videoMemIndex++] = 0x00000000;
+                }
+            }
+        }
+    }
+}
+
 /**
  Instruction Implementations
  !!!! `his has to be here!!!
@@ -63,12 +151,28 @@ disassembly_t disassembly;
 #include "6502_instructions.h"
 
 /////
+#ifdef SPEEDTEST
 unsigned long long int clktime = 0;
-
+#endif
 
 INLINE int m6502_Step() {
 
-#ifdef DEBUG
+    
+#ifdef DEBUG___
+    switch ( m6502.PC ) {
+        case 0xC600:
+            printf("DISK...\n");
+            break;
+            
+        case 0xC62F:
+            printf("DISK IO...\n");
+            break;
+            
+        default:
+            break;
+    }
+
+    
     switch ( m6502.PC ) {
         case 0xE000:
             dbgPrintf("START...\n");
@@ -539,7 +643,7 @@ INLINE int m6502_Step() {
 //            case 0xFF:
 
         default:
-            printf("%04X: Unimplemented Instruction 0x%02X\n", m6502.PC -1, memread( m6502.PC -1 ));
+            dbgPrintf("%04X: Unimplemented Instruction 0x%02X\n", m6502.PC -1, memread( m6502.PC -1 ));
             return 2;
     }
 //    } // fetch16
@@ -558,8 +662,8 @@ double mhz = 0;
 unsigned long long epoch = 0;
 
 void m6502_Run() {
-    unsigned int clk = 0;
-    unsigned int clkfrm = 0;
+    static unsigned int clk = 0;
+    static unsigned int clkfrm = 0;
     
     // init time
 //#ifdef CLK_WAIT
@@ -567,28 +671,52 @@ void m6502_Run() {
 //#endif
 
 #ifdef SPEEDTEST
-    for ( unsigned long long int i = 0; i < iterations ; i++ )
+    for ( inst_cnt = 0; inst_cnt < iterations ; inst_cnt++ )
 #elif defined( CLK_WAIT )
-    for ( clkfrm = 0; clkfrm < clk_6502_per_frm ; clkfrm += clk )
+        for ( clkfrm = 0; clkfrm < clk_6502_per_frm ; clkfrm += clk )
 #else
 //    for ( ; m6502.pc ; )
     for ( ; ; )
 #endif
     {
+        
+#ifdef INTERRUPR_CHECK_PER_STEP
         if ( m6502.IF ) {
             switch (m6502.interrupt) {
                 case HLT:
                     // CPU is haletd, nothing to do here...
                     return;
                     
+                case IRQ:
+                    m6502.PC = memread16(IRQ_VECTOR);
+                    // TODO: PUSH things onto stack?
+                    break;
+                    
                 case NMI:
+                    m6502.PC = memread16(NMI_VECTOR);
+                    // TODO: PUSH things onto stack?
                     break;
                     
                 case HARDRESET:
+                    m6502.PC = memread16(RESET_VECTOR);
+                    // make sure it will be a cold reset...
+                    memwrite(0x3F4, 0);
+                    m6502.SP = 0xFF;
+                    // N V - B D I Z C
+                    // 0 0 1 0 0 1 0 1
+                    m6502.SR = 0x25;
+                    
                     break;
                     
                 case SOFTRESET:
-                    m6502.PC = memread16(SOFTRESET_VECTOR);
+//                    m6502.PC = memread16(SOFTRESET_VECTOR);
+                    m6502.PC = memread16( RESET_VECTOR );
+
+                    m6502.SP = 0xFF;
+                    // N V - B D I Z C
+                    // 0 0 1 0 0 1 0 1
+                    m6502.SR = 0x25;
+
                     break;
                     
                 default:
@@ -597,12 +725,16 @@ void m6502_Run() {
             
             m6502.IF = 0;
         }
-
-        dbgPrintf("%llu %04X: ", clktime, m6502.PC);
-        clktime += clk = m6502_Step();
+#endif // INTERRUPR_CHECK_PER_STEP
+        
+//        dbgPrintf("%llu %04X: ", clktime, m6502.PC);
+#ifdef SPEEDTEST
+        clktime +=
+#endif
+        clk = m6502_Step();
         printDisassembly();
         
-        dbgPrintf("\nA:%02X X:%02X Y:%02X SP:%02X %c%c%c%c%c%c%c%c\n",
+        dbgPrintf2("A:%02X X:%02X Y:%02X SP:%02X %c%c%c%c%c%c%c%c\n\n",
                   m6502.A,
                   m6502.X,
                   m6502.Y,
@@ -651,7 +783,82 @@ void m6502_Run() {
 //    mhz = clktime / (execution_time * M);
 }
 
-void m6502_Reset() {
+void read_rom( const char * filename, const uint16_t addr ) {
+    FILE * f = fopen(filename, "rb");
+    if (f == NULL) {
+        perror("Failed: ");
+        return;
+    }
+    
+    fseek(f, 0L, SEEK_END);
+    uint16_t flen = ftell(f);
+    fseek(f, 0L, SEEK_SET);
+
+    fread( RAM + addr, 1, flen, f);
+    fclose(f);
+
+}
+
+
+void read_woz( const char * filename ) {
+    FILE * f = fopen(filename, "rb");
+    if (f == NULL) {
+        perror("Failed: ");
+        return;
+    }
+    
+    fread( &woz_header, 1, sizeof(woz_header_t), f);
+    if ( woz_header.magic != WOZ1_MAGIC ) {
+        return;
+    }
+    
+    while ( ! feof(f) ) {
+        // beginning of the chunk, so we can skip it later
+        
+        long r = fread( &woz_chunk_header, 1, sizeof(woz_chunk_header_t), f);
+        if ( r != sizeof(woz_chunk_header_t) ) {
+            break;
+        }
+        long foffs = ftell(f);
+        
+        void * buf = NULL;
+
+        switch ( woz_chunk_header.magic ) {
+            case WOZ_INFO_CHUNK_ID:
+                break;
+
+            case WOZ_TMAP_CHUNK_ID:
+                buf = &woz_tmap;
+                break;
+
+            case WOZ_TRKS_CHUNK_ID:
+                buf = woz_trks;
+                break;
+
+            case WOZ_META_CHUNK_ID:
+                break;
+
+            default:
+                break;
+        }
+        
+        if (buf) {
+            r = fread( buf, 1, woz_chunk_header.size, f);
+            if ( r != woz_chunk_header.size ) {
+                break;
+            }
+        }
+
+        // make sure we are skipping unhandled chunks correctly
+        fseek(f, foffs + woz_chunk_header.size, SEEK_SET);
+    }
+    
+    fclose(f);
+
+
+}
+
+void m6502_ColdReset() {
     inst_cnt = 0;
     mhz = (double)MHz_6502 / M;
 
@@ -661,12 +868,12 @@ void m6502_Reset() {
     tick_per_sec = e - epoch;
     tick_6502_per_sec = tick_per_sec / MHz_6502;
     
-    memset( RAM, 0xFF, sizeof(RAM) );
+    memset( RAM, 0xFF, sizeof(Apple2_64K_RAM) );
     memset( RAM + 0xC000, 0, 0x1000 ); // I/O area should be 0
 
     m6502.A = m6502.X = m6502.Y = 0xFF;
     // reset vector
-    m6502.SP = 0xFF -3;
+    m6502.SP = 0xFF; //-3;
     
     // N V - B D I Z C
     // 0 0 1 1 0 1 0 0
@@ -690,15 +897,16 @@ void m6502_Reset() {
     m6502.PC = 0x400;
 
 #else
-    FILE * f = fopen("/Users/trudnai/Library/Containers/com.gamealloy.A2Mac/Data/Apple2Plus.rom", "rb");
-    if (f == NULL) {
-        perror("Failed: ");
-        return;
-    }
+    // Apple ][e ROM
+    read_rom("/Users/trudnai/Library/Containers/com.gamealloy.A2Mac/Data/Apple2Plus.rom", 0xD000);
+    // Disk ][ ROM in Slot 6
+//    read_rom("/Users/trudnai/Library/Containers/com.gamealloy.A2Mac/Data/DISK_II_C600.ROM", 0xC600);
     
-    fread( RAM + 0xD000, 1, 0x3000, f);
-    fclose(f);
+    // WOZ DISK
+//    read_woz("/Users/trudnai/Library/Containers/com.gamealloy.A2Mac/Data/DOS 3.3 System Master.woz");
+//    read_woz("/Users/trudnai/Library/Containers/com.gamealloy.A2Mac/Data/Hard Hat Mack - Disk 1, Side A.woz");
 
+    
     m6502.PC = memread16( RESET_VECTOR );
 #endif
     
@@ -812,22 +1020,24 @@ void tst6502() {
     // insert code here...
     printf("6502\n");
     
-    m6502_Reset();
+    m6502_ColdReset();
     
     //    clock_t start = clock();
     epoch = rdtsc();
     m6502_Run();
     //    clock_t end = clock();
     //    double execution_time = ((double) (end - start)) / CLOCKS_PER_SEC;
+    
+#ifdef SPEEDTEST
     unsigned long long end = rdtsc();
     unsigned long long elapsed = end - epoch;
     double execution_time = (double)elapsed / tick_per_sec;
     
     double mips = inst_cnt / (execution_time * M);
     double mhz = clktime / (execution_time * M);
-    printf("clk:%llu Elpased time: (%llu / %u / %llu), %.3lfs (%.3lf MIPS, %.3lf MHz)\n", clktime, tick_per_sec, MHz_6502, tick_6502_per_sec, execution_time, mips, mhz);
+    printf("clk:%llu Elpased time: (%llu / %u / %llu), %.3lfs (%.3lf MIPS, %.3lf MHz)\n", iterations *3, tick_per_sec, MHz_6502, tick_6502_per_sec, execution_time, mips, mhz);
 //    printf("  dd:%llu  ee:%llu  nn:%llu\n", dd, ee, ee - dd);
-
+#endif
 }
 
 int ___main(int argc, const char * argv[]) {
diff --git a/A2Mac/6502.h b/A2Mac/6502.h
index 6eff18c..36955ac 100644
--- a/A2Mac/6502.h
+++ b/A2Mac/6502.h
@@ -9,7 +9,7 @@
 #ifndef __6502_H__
 #define __6502_H__
 
-#import "stdint.h"
+#import <stdint.h>
 
 #ifdef DEBUG
 //#define dbgPrintf(format, ...) printf (format, ## __VA_ARGS__)
@@ -23,16 +23,21 @@
 typedef enum {
     NO_INT,
     HLT,
+    IRQ,
     NMI,
     HARDRESET,
     SOFTRESET,
 } interrupt_t;
 
-typedef enum {
-    NO_DEBUG,
-    DISASSEMBLY,
-    DEBUGBRK,
-    STEPBYSTEP,
+typedef struct debugLevel_s {
+    uint8_t trace       : 1;
+    uint8_t step        : 1;
+    uint8_t brk         : 1;
+    uint8_t rts         : 1;
+    uint8_t bra         : 1;
+    uint8_t bra_true    : 1;
+    uint8_t bra_false   : 1;
+    uint8_t compile     : 1;
 } debugLevel_t;
 
 typedef struct m6502_s {
@@ -73,25 +78,28 @@ typedef struct m6502_s {
 
 
 typedef struct disassembly_s {
-    char codeAddr[5];                // 4 digits + \0
-    char hex[4 * 3 + 1];             // max 4 bytes * (2 digits + 1 space) + \0
-    char * pHex;
-    char inst[6 + 1];                // 3 char (unknown instr? -- give it 6 chars) + \0
-    char addr[4 + 2 + 1 + 1 + 1];    // 4 digits + 2 brackets + 1 comma + 1 index + \0
-    char comment[256];               // to be able to add some comments
+    char addr[5];                   // 4 digits + \0
+    char opcode[4 * 3 + 1];         // max 4 bytes * (2 digits + 1 space) + \0
+    char * pOpcode;                 // pointer for opcode string builder
+    char inst[6 + 1];               // 3 char (unknown instr? -- give it 6 chars) + \0
+    char oper[14 + 2 + 1 + 1 + 1];   // 4 digits + 2 brackets + 1 comma + 1 index + \0
+    char comment[256];              // to be able to add some comments
 } disassembly_t;
 
 
 extern m6502_t m6502;
-extern uint8_t RAM[ 64 * 1024 ];
+extern uint8_t * RAM;
+extern uint32_t * videoMemPtr;
+
+extern void hires_Update(void);
 
 extern double mips;
 extern double mhz;
 extern const unsigned int fps;
 
-extern void tst6502();
-extern void m6502_Reset();
-extern void m6502_Run();
+extern void tst6502(void);
+extern void m6502_ColdReset(void);
+extern void m6502_Run(void);
 extern void kbdInput ( uint8_t code );
 
 #endif /* __6502_H__ */
diff --git a/A2Mac/Apple2_mmio.h b/A2Mac/Apple2_mmio.h
index 1debd31..f7f20e4 100644
--- a/A2Mac/Apple2_mmio.h
+++ b/A2Mac/Apple2_mmio.h
@@ -13,13 +13,44 @@
 #include "6502.h"
 
 
-enum mmio {
-    io_KBD = 0xC000,
-    io_KBDSTRB = 0xC010,
+uint8_t Apple2_64K_RAM[ 64 * KB ] = {0};
+uint8_t * RAM = Apple2_64K_RAM;
+
+enum slot {
+    SLOT0   = 0x00,
+    SLOT1   = 0x10,
+    SLOT2   = 0x20,
+    SLOT3   = 0x30,
+    SLOT4   = 0x40,
+    SLOT5   = 0x50,
+    SLOT6   = 0x60,
+    SLOT7   = 0x70,
 };
 
 
-uint8_t RAM[ 64 * KB ] = {0};
+enum mmio {
+    io_KBD              = 0xC000,
+    io_KBDSTRB          = 0xC010,
+    
+    io_DISK_PHASE0_OFF  = 0xC080,
+    io_DISK_PHASE0_ON   = 0xC081,
+    io_DISK_PHASE1_OFF  = 0xC082,
+    io_DISK_PHASE1_ON   = 0xC083,
+    io_DISK_PHASE2_OFF  = 0xC084,
+    io_DISK_PHASE2_ON   = 0xC085,
+    io_DISK_PHASE3_OFF  = 0xC086,
+    io_DISK_PHASE3_ON   = 0xC087,
+    io_DISK_POWER_OFF   = 0xC088,
+    io_DISK_POWER_ON    = 0xC089,
+    io_DISK_SELECT_1    = 0xC08A,
+    io_DISK_SELECT_2    = 0xC08B,
+    io_DISK_READ        = 0xC08C,
+    io_DISK_WRITE       = 0xC08D,
+    io_DISK_CLEAR       = 0xC08E,
+    io_DISK_SHIFT       = 0xC08F,
+    
+};
+
 
 #define PAGESIZE 256
 #define PAGES 16
@@ -71,8 +102,79 @@ typedef union address16_u {
 } address16_t;
 
 
+#define CASE_DISKII(x) \
+    case io_DISK_PHASE0_OFF + SLOT##x: \
+        printf("io_DISK_PHASE0_OFF (S%u)\n", x); \
+        return 0; \
+    case io_DISK_PHASE0_ON + SLOT##x: \
+        printf("io_DISK_PHASE0_ON (S%u)\n", x); \
+        return 0; \
+    case io_DISK_PHASE1_OFF + SLOT##x: \
+        printf("io_DISK_PHASE1_OFF (S%u)\n", x); \
+        return 0; \
+    case io_DISK_PHASE1_ON + SLOT##x: \
+        printf("io_DISK_PHASE1_ON (S%u)\n", x); \
+        return 0; \
+    case io_DISK_PHASE2_OFF + SLOT##x: \
+        printf("io_DISK_PHASE2_OFF (S%u)\n", x); \
+        return 0; \
+    case io_DISK_PHASE2_ON + SLOT##x: \
+        printf("io_DISK_PHASE2_ON (S%u)\n", x); \
+        return 0; \
+    case io_DISK_PHASE3_OFF + SLOT##x: \
+        printf("io_DISK_PHASE3_OFF (S%u)\n", x); \
+        return 0; \
+    case io_DISK_PHASE3_ON + SLOT##x: \
+        printf("io_DISK_PHASE3_ON (S%u)\n", x); \
+        return 0; \
+    case io_DISK_POWER_OFF + SLOT##x: \
+        printf("io_DISK_POWER_OFF (S%u)\n", x); \
+        return 0; \
+    case io_DISK_POWER_ON + SLOT##x: \
+        printf("io_DISK_POWER_ON (S%u)\n", x); \
+        return 0; \
+    case io_DISK_SELECT_1 + SLOT##x: \
+        printf("io_DISK_SELECT_1 (S%u)\n", x); \
+        return 0; \
+    case io_DISK_SELECT_2 + SLOT##x: \
+        printf("io_DISK_SELECT_2 (S%u)\n", x); \
+        return 0; \
+    case io_DISK_READ + SLOT##x: \
+        printf("io_DISK_READ (S%u)\n", x); \
+        return 0; \
+    case io_DISK_WRITE + SLOT##x: \
+        printf("io_DISK_WRITE (S%u)\n", x); \
+        return 0; \
+    case io_DISK_CLEAR + SLOT##x: \
+        printf("io_DISK_CLEAR (S%u)\n", x); \
+        return 0; \
+    case io_DISK_SHIFT + SLOT##x: \
+        printf("io_DISK_SHIFT (S%u)\n", x); \
+        return 0;
+
+
+static const minDiskPhaseNum = 0;
+static const maxDiskPhaseNum = 80;
+static int trackPhase = maxDiskPhaseNum;
+
+struct phase_t {
+    uint8_t current : 2;
+    uint8_t last    : 2;
+} phase = {0};
+
+static const int8_t phaseTransition[4][4] = {
+    {  0, -1,  0, +1 },
+    { +1,  0, -1,  0 },
+    {  0, +1,  0, -1 },
+    { -1,  0, +1,  0 },
+};
+
+
+
+
 INLINE uint8_t ioRead( uint16_t addr ) {
-//    printf("mmio read:%04X\n", addr);
+    dbgPrintf("mmio read:%04X\n", addr);
+    
     switch (addr) {
         case io_KBD:
 //            if ( RAM[io_KBD] > 0x7F ) printf("io_KBD:%04X\n", addr);
@@ -83,10 +185,68 @@ INLINE uint8_t ioRead( uint16_t addr ) {
 //            printf("io_KBDSTRB\n");
             return RAM[io_KBD] &= 0x7F;
 
+//        CASE_DISKII(6)
+
+        // TODO: Make code "card insertable to slot" / aka slot independent and dynamically add/remove
+        case io_DISK_PHASE0_OFF + SLOT6:
+        case io_DISK_PHASE1_OFF + SLOT6:
+        case io_DISK_PHASE2_OFF + SLOT6:
+        case io_DISK_PHASE3_OFF + SLOT6:
+            dbgPrintf2("io_DISK_PHASE%u_OFF (S%u)\n", phase.current, 6);
+            phase.last = phase.current;
+            return 0;
+            
+        case io_DISK_PHASE0_ON + SLOT6:
+        case io_DISK_PHASE1_ON + SLOT6:
+        case io_DISK_PHASE2_ON + SLOT6:
+        case io_DISK_PHASE3_ON + SLOT6: {
+            phase.current = (addr - io_DISK_PHASE0_ON - SLOT6) / 2;
+            trackPhase += phaseTransition[phase.current][phase.last];
+            if ( trackPhase < minDiskPhaseNum ) {
+                trackPhase = minDiskPhaseNum;
+            }
+            if ( trackPhase > maxDiskPhaseNum ) {
+                trackPhase = maxDiskPhaseNum;
+            }
+            dbgPrintf2("io_DISK_PHASE%u_ON (S%u, trk:%u)\n", phase.current, 6, trackPhase);
+            return 0;
+        }
+        case io_DISK_POWER_OFF + SLOT6:
+            dbgPrintf2("io_DISK_POWER_OFF (S%u)\n", 6);
+            return 0;
+        case io_DISK_POWER_ON + SLOT6:
+            dbgPrintf2("io_DISK_POWER_ON (S%u)\n", 6);
+            return 0;
+        case io_DISK_SELECT_1 + SLOT6:
+            dbgPrintf2("io_DISK_SELECT_1 (S%u)\n", 6);
+            return 0;
+        case io_DISK_SELECT_2 + SLOT6:
+            dbgPrintf2("io_DISK_SELECT_2 (S%u)\n", 6);
+            return 0;
+        case io_DISK_READ + SLOT6:
+            dbgPrintf("io_DISK_READ (S%u)\n", 6);
+            int track = woz_tmap.phase[trackPhase];
+            if (trackOffset >= WOZ_TRACK_BYTE_COUNT ) {
+                trackOffset = 0;
+            }
+            printf("offs:%u\n", trackOffset);
+            return woz_trks[track].data[trackOffset++];
+        case io_DISK_WRITE + SLOT6:
+            dbgPrintf2("io_DISK_WRITE (S%u)\n", 6);
+            return 0;
+        case io_DISK_CLEAR + SLOT6:
+            dbgPrintf2("io_DISK_CLEAR (S%u)\n", 6);
+            return 0;
+        case io_DISK_SHIFT + SLOT6:
+            dbgPrintf2("io_DISK_SHIFT (S%u)\n", 6);
+            return 0;
+
+            
+            
         default:
-            break;
+            return RAM[addr];
     }
-    return 0;
+    
 }
 
 
@@ -135,6 +295,24 @@ INLINE uint8_t memread_zp( uint8_t addr ) {
     return RAM[ addr ];
 }
 
+/**
+ Naive implementation of RAM read from address
+ **/
+INLINE uint8_t memread8( uint16_t addr ) {
+//    if ( addr == 0xD2AD ) {
+//        dbgPrintf("OUT OF MEMORY!\n");
+//    }
+    
+
+    return RAM[ addr ];
+}
+/**
+ Naive implementation of RAM read from address
+ **/
+INLINE uint16_t memread16( uint16_t addr ) {
+    return * (uint16_t*) (& RAM[ addr ]);
+}
+
 INLINE uint8_t memread( uint16_t addr ) {
 //    switch ( ((address16_t)addr).page ) {
 //        case 0xC0:
@@ -159,29 +337,11 @@ INLINE uint8_t memread( uint16_t addr ) {
 //            break;
 //    }
 
-    if ( (addr >= 0xC000) && (addr < 0xD000) ) {
+    if ( (addr >= 0xC000) && (addr < 0xC0FF) ) {
         return ioRead(addr);
     }
     
-    return RAM[ addr ];
-}
-
-/**
- Naive implementation of RAM read from address
- **/
-INLINE uint8_t memread8( uint16_t addr ) {
-//    if ( addr == 0xD2AD ) {
-//        dbgPrintf("OUT OF MEMORY!\n");
-//    }
-    
-
-    return RAM[ addr ];
-}
-/**
- Naive implementation of RAM read from address
- **/
-INLINE uint16_t memread16( uint16_t addr ) {
-    return * (uint16_t*) (& RAM[ addr ]);
+    return memread8(addr);
 }
 
 /**
@@ -222,7 +382,7 @@ static  void memwrite( uint16_t addr, uint8_t byte ) {
  increase pc by one
  **/
 INLINE uint8_t fetch() {
-    disHexB( disassembly.pHex, RAM[m6502.PC] );
+    disHexB( disassembly.pOpcode, RAM[m6502.PC] );
     return memread( m6502.PC++ );
 }
 
@@ -233,7 +393,7 @@ INLINE uint8_t fetch() {
 INLINE uint16_t fetch16() {
     uint16_t word = memread16( m6502.PC );
     m6502.PC += 2;
-    disHexW( disassembly.pHex, word );
+    disHexW( disassembly.pOpcode, word );
     return word;
 }
 
@@ -243,7 +403,7 @@ INLINE uint16_t fetch16() {
  **/
 INLINE uint16_t addr_abs() {
     dbgPrintf("abs:%04X(%02X) ", *((uint16_t*)&RAM[m6502.PC]), RAM[*((uint16_t*)&RAM[m6502.PC])]);
-    disPrintf(disassembly.addr, "$%04X", memread16(m6502.PC))
+    disPrintf(disassembly.oper, "$%04X", memread16(m6502.PC))
     return fetch16();
 }
 INLINE uint8_t src_abs() {
@@ -255,15 +415,15 @@ INLINE uint8_t * dest_abs() {
 
 
 INLINE int8_t rel_addr() {
-    disPrintf(disassembly.addr, "$%04X", m6502.PC + 1 + (int)memread8(m6502.PC))
+    disPrintf(disassembly.oper, "$%04X", m6502.PC + 1 + (int8_t)memread8(m6502.PC))
     return fetch();
 }
 INLINE uint16_t abs_addr() {
-    disPrintf(disassembly.addr, "$%04X", memread16(m6502.PC))
+    disPrintf(disassembly.oper, "$%04X", memread16(m6502.PC))
     return fetch16();
 }
 INLINE uint16_t ind_addr() {
-    disPrintf(disassembly.addr, "($%04X)", memread16(m6502.PC))
+    disPrintf(disassembly.oper, "($%04X)", memread16(m6502.PC))
     return memread16( fetch16() );
 }
 
@@ -273,11 +433,11 @@ INLINE uint16_t ind_addr() {
  **/
 INLINE uint16_t addr_abs_X() {
     dbgPrintf("abs,X:%04X(%02X) ", *((uint16_t*)&RAM[m6502.PC]) + m6502.X, RAM[*((uint16_t*)&RAM[m6502.PC]) + m6502.X]);
-    disPrintf(disassembly.addr, "$%04X,X", memread16(m6502.PC))
+    disPrintf(disassembly.oper, "$%04X,X", memread16(m6502.PC))
     return fetch16() + m6502.X;
 }
 INLINE uint8_t src_abs_X() {
-    return memread8( addr_abs_X() );
+    return memread( addr_abs_X() );
 }
 INLINE uint8_t * dest_abs_X() {
     return & RAM[ addr_abs_X() ];
@@ -290,18 +450,18 @@ INLINE uint8_t * dest_abs_X() {
  **/
 INLINE uint16_t addr_abs_Y() {
     dbgPrintf("abs,Y:%04X(%02X) ", *((uint16_t*)&RAM[m6502.PC]) + m6502.Y, RAM[*((uint16_t*)&RAM[m6502.PC]) + m6502.Y]);
-    disPrintf(disassembly.addr, "$%04X,Y", memread16(m6502.PC))
-    return abs_addr() + m6502.Y;
+    disPrintf(disassembly.oper, "$%04X,Y", memread16(m6502.PC))
+    return fetch16() + m6502.Y;
 }
 INLINE uint8_t src_abs_Y() {
-    return memread8(addr_abs_Y());
+    return memread(addr_abs_Y());
 }
 INLINE uint8_t * dest_abs_Y() {
     return & RAM[ addr_abs_Y() ];
 }
 
 INLINE uint16_t imm() {
-    disPrintf(disassembly.addr, "#$%02X", memread8(m6502.PC))
+    disPrintf(disassembly.oper, "#$%02X", memread8(m6502.PC))
     return fetch();
 }
 
@@ -312,7 +472,7 @@ INLINE uint16_t imm() {
  **/
 INLINE uint8_t addr_zp() {
     dbgPrintf("zp:%02X(%02X) ", RAM[m6502.PC], RAM[ RAM[m6502.PC]] );
-    disPrintf(disassembly.addr, "$%02X", memread8(m6502.PC))
+    disPrintf(disassembly.oper, "$%02X", memread8(m6502.PC))
     return fetch();
 }
 INLINE uint8_t src_zp() {
@@ -327,7 +487,7 @@ INLINE uint8_t * dest_zp() {
  **/
 INLINE uint16_t addr_zp_ind( uint8_t addr ) {
     dbgPrintf("zpi:%02X:%04X(%02X) ", RAM[m6502.PC], *((uint16_t*)&RAM[m6502.PC]), RAM[*((uint16_t*)&RAM[m6502.PC])]);
-    disPrintf(disassembly.addr, "($%02X)", memread8(m6502.PC))
+    disPrintf(disassembly.oper, "($%02X) {$%04X}", memread8(m6502.PC), memread16( memread8(m6502.PC) ) )
     return memread16(addr);
 }
 
@@ -338,11 +498,11 @@ INLINE uint16_t addr_zp_ind( uint8_t addr ) {
  **/
 INLINE uint16_t addr_X_ind() {
     dbgPrintf("zpXi:%02X:%04X(%02X) ", RAM[m6502.PC], *((uint16_t*)&RAM[m6502.PC]) + m6502.X, RAM[*((uint16_t*)&RAM[m6502.PC]) + m6502.X]);
-    disPrintf(disassembly.addr, "($%02X,X)", memread8(m6502.PC))
-    return addr_zp_ind( fetch() + m6502.X );
+    disPrintf(disassembly.oper, "($%02X,X) {$%04X}", memread8(m6502.PC), memread16( memread8(m6502.PC) + m6502.X) )
+    return memread16( fetch() + m6502.X );
 }
 INLINE uint8_t src_X_ind() {
-    return memread8( addr_X_ind() );
+    return memread( addr_X_ind() );
 }
 INLINE uint8_t * dest_X_ind() {
     return & RAM[ addr_X_ind() ];
@@ -356,17 +516,17 @@ INLINE uint8_t * dest_X_ind() {
 INLINE uint16_t addr_ind_Y() {
     //    uint8_t a = fetch();
     //    dbgPrintf("addr_ind_Y: %04X + %02X = %04X ", addr_zpg_ind( a ), m6502.Y, addr_zpg_ind( a ) + m6502.Y);
-    disPrintf(disassembly.addr, "($%02X),Y", memread8(m6502.PC))
-    return addr_zp_ind( fetch() ) + m6502.Y;
+    disPrintf(disassembly.oper, "($%02X),Y {$%04X}", memread8(m6502.PC), memread16( memread8(m6502.PC) ) + m6502.Y)
+    return memread16( fetch() ) + m6502.Y;
 }
 INLINE uint8_t src_ind_Y() {
-    return memread8( addr_ind_Y() );
+    return memread( addr_ind_Y() );
 }
 INLINE uint8_t * dest_ind_Y() {
     uint16_t addr = addr_ind_Y();
-    if ( (addr >= 0xC000) && (addr <= 0xC0FF) ) {
-        addr = 0xC111;
-    }
+//    if ( (addr >= 0xC000) && (addr <= 0xC0FF) ) {
+//        addr = 0xC111;
+//    }
     //    return & RAM[ addr_abs_Y() ];
     return & RAM[ addr ];
 //    return & RAM[ addr_ind_Y() ];
@@ -378,7 +538,7 @@ INLINE uint8_t * dest_ind_Y() {
  effective address is address incremented by X without carry **
  **/
 INLINE uint8_t addr_zp_X() {
-    disPrintf(disassembly.addr, "$%02X,X", memread8(m6502.PC))
+    disPrintf(disassembly.oper, "$%02X,X", memread8(m6502.PC))
     return fetch() + m6502.X;
 }
 INLINE uint8_t src_zp_X() {
@@ -394,7 +554,7 @@ INLINE uint8_t * dest_zp_X() {
  effective address is address incremented by Y without carry **
  **/
 INLINE uint8_t addr_zp_Y() {
-    disPrintf(disassembly.addr, "$%02X,Y", memread8(m6502.PC))
+    disPrintf(disassembly.oper, "$%02X,Y", memread8(m6502.PC))
     return fetch() + m6502.Y;
 }
 INLINE uint8_t src_zp_Y() {
diff --git a/A2Mac/Base.lproj/Main.storyboard b/A2Mac/Base.lproj/Main.storyboard
index f7d781d..24ab6ff 100644
--- a/A2Mac/Base.lproj/Main.storyboard
+++ b/A2Mac/Base.lproj/Main.storyboard
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="14490.70" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" initialViewController="B8D-0N-5wS">
+<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="14868" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" initialViewController="B8D-0N-5wS">
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="14490.70"/>
-        <capability name="System colors introduced in macOS 10.14" minToolsVersion="10.0"/>
+        <deployment identifier="macosx"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="14868"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
@@ -705,7 +705,7 @@
         <scene sceneID="hIz-AP-VOD">
             <objects>
                 <viewController id="XfG-lQ-9wD" customClass="ViewController" customModule="A2Mac" customModuleProvider="target" sceneMemberID="viewController">
-                    <view key="view" id="m2S-Jp-Qdl" customClass="QuietView" customModule="A2Mac" customModuleProvider="target">
+                    <view key="view" id="m2S-Jp-Qdl" customClass="MonitorView" customModule="A2Mac" customModuleProvider="target">
                         <rect key="frame" x="0.0" y="0.0" width="680" height="400"/>
                         <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMaxX="YES" flexibleMinY="YES" flexibleMaxY="YES"/>
                         <subviews>
@@ -720,13 +720,13 @@
                                     </allowedInputSourceLocales>
                                 </textFieldCell>
                             </textField>
-                            <textField verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" mirrorLayoutDirectionWhenInternationalizing="never" textCompletion="NO" translatesAutoresizingMaskIntoConstraints="NO" id="SEL-hl-0c0">
+                            <textField canDrawConcurrently="YES" verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" mirrorLayoutDirectionWhenInternationalizing="never" textCompletion="NO" translatesAutoresizingMaskIntoConstraints="NO" id="SEL-hl-0c0">
                                 <rect key="frame" x="14" y="8" width="572" height="384"/>
                                 <constraints>
                                     <constraint firstAttribute="width" constant="568" id="uez-Mi-0Sh"/>
                                     <constraint firstAttribute="height" constant="384" id="zl6-au-oZj"/>
                                 </constraints>
-                                <textFieldCell key="cell" lineBreakMode="truncatingTail" selectable="YES" allowsUndo="NO" sendsActionOnEndEditing="YES" state="on" baseWritingDirection="leftToRight" id="pIk-RC-s5g">
+                                <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" refusesFirstResponder="YES" allowsUndo="NO" sendsActionOnEndEditing="YES" state="on" baseWritingDirection="leftToRight" id="pIk-RC-s5g">
                                     <font key="font" size="16" name="PrintChar21"/>
                                     <string key="title">1234567890123456789012345678901234567890
 @@@@@@@@@1@@@@@@@@@2@@@@@@@@@3@@@@@@@@@4
@@ -753,10 +753,7 @@
 @@@@@@@@@@@@@@@@@@23@@@@@@@@@@@@@@@@@@@@
 @@@@@@@@@@@@@@@@@@24@@@@@@@@@@@@@@@@@@@@</string>
                                     <color key="textColor" name="systemGreenColor" catalog="System" colorSpace="catalog"/>
-                                    <color key="backgroundColor" name="alternatingContentBackgroundColor" catalog="System" colorSpace="catalog"/>
-                                    <allowedInputSourceLocales>
-                                        <string>NSAllRomanInputSourcesLocaleIdentifier</string>
-                                    </allowedInputSourceLocales>
+                                    <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
                                 </textFieldCell>
                             </textField>
                             <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="mfd-12-bcR">
@@ -796,7 +793,7 @@
                                     <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
                                 </textFieldCell>
                             </textField>
-                            <customView hidden="YES" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="LlM-EV-ruZ" customClass="HiRes" customModule="A2Mac" customModuleProvider="target">
+                            <customView fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="LlM-EV-ruZ" customClass="HiRes" customModule="A2Mac" customModuleProvider="target">
                                 <rect key="frame" x="16" y="8" width="568" height="384"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                             </customView>
@@ -820,9 +817,9 @@
                         </constraints>
                     </view>
                     <connections>
-                        <outlet property="HiRes" destination="LlM-EV-ruZ" id="E60-pA-HM1"/>
                         <outlet property="display" destination="pIk-RC-s5g" id="Hvd-DI-h6z"/>
                         <outlet property="displayField" destination="SEL-hl-0c0" id="4Pc-hG-qQf"/>
+                        <outlet property="hires" destination="LlM-EV-ruZ" id="E60-pA-HM1"/>
                         <outlet property="speedometer" destination="FBZ-dh-6Fs" id="L0v-RY-xwB"/>
                     </connections>
                 </viewController>
diff --git a/A2Mac/HiRes.swift b/A2Mac/HiRes.swift
index 1e04c4a..4a9dd27 100644
--- a/A2Mac/HiRes.swift
+++ b/A2Mac/HiRes.swift
@@ -18,18 +18,42 @@ class HiRes: NSView {
     static let PixelWidth  = 280
     static let PixelMixedHeight = 160
     static let PixelHeight = 192
-    static let LineBlocks = 40
+    static let blockRows = 24
+    static let blockCols = 40
+    static let blockWidth = PixelWidth / blockCols
+    static let blockHeight = PixelHeight / blockRows
 
-    let HiResBufferPointer = UnsafeRawBufferPointer(start: &RAM + Page1Addr, count: PageSize * 2)
+    let HiResBufferPointer = UnsafeRawBufferPointer(start: RAM + Page1Addr, count: PageSize * 2)
+    let HiResRawPointer = UnsafeRawPointer(RAM + Page1Addr)
+
+    #if METAL_YES
+    var device: MTLDevice!
+    var metalLayer: CAMetalLayer!
+    var vertexBuffer: MTLBuffer!
+    var renderPipelineState: MTLRenderPipelineState!
+    var computePipelineState: MTLComputePipelineState!
+    var commandQueue: MTLCommandQueue!
+//    var timer: CADisplayLink! // iOS only!
+    var timer: CVDisplayLink! // MacOS only!
+    var defaultLibrary : MTLLibrary!
+    var addFunction : MTLFunction!
+    var mtlBufferA : MTLBuffer!
+    var mtlBufferB : MTLBuffer!
+    var mtlBufferC : MTLBuffer!
+
+    let vertexData: [Float] = [
+       0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0
+    ]
+    #endif // METAL_YES
     
     // holds the starting addresses for each lines minus the screen page starting address
-    var HiResLineAddrTbl = [UInt16](repeating: 0, count: PixelHeight)
+    var HiResLineAddrTbl = [Int](repeating: 0, count: PixelHeight)
 
     func initHiResLineAddresses() {
         var i = 0
-        for x : UInt16 in stride(from: 0, through: 0x50, by: 0x28) {
-            for y : UInt16 in stride(from: 0, through: 0x380, by: 0x80) {
-                for z : UInt16 in stride(from: 0, through: 0x1C00, by: 0x400) {
+        for x in stride(from: 0, through: 0x50, by: 0x28) {
+            for y in stride(from: 0, through: 0x380, by: 0x80) {
+                for z in stride(from: 0, through: 0x1C00, by: 0x400) {
                     HiResLineAddrTbl[i] = x + y + z
                     i += 1
                 }
@@ -37,16 +61,87 @@ class HiRes: NSView {
         }
     }
     
+    #if METAL_YES
+    func initMetal() {
+        device = MTLCreateSystemDefaultDevice()
+        metalLayer = CAMetalLayer()          // 1
+        metalLayer.device = device           // 2
+        metalLayer.pixelFormat = .bgra8Unorm // 3
+        metalLayer.framebufferOnly = true    // 4
+        metalLayer.frame = frame  // 5
+//        hires.layer = metalLayer   // 6
+        
+//        let dataSize = vertexData.count * MemoryLayout.size(ofValue: vertexData[0]) // 1
+//        vertexBuffer = device.makeBuffer(bytes: vertexData, length: dataSize, options: []) // 2
+        
+        // 1
+        defaultLibrary = device.makeDefaultLibrary()!
+        addFunction = defaultLibrary.makeFunction(name: "add_arrays")
+        
+        computePipelineState = try! device.makeComputePipelineState(function: addFunction)
+        
+//        let fragmentProgram = defaultLibrary.makeFunction(name: "basic_fragment")
+//        let vertexProgram = defaultLibrary.makeFunction(name: "basic_vertex")
+            
+        // 2
+//        let pipelineState
+//        let pipelineStateDescriptor = MTLRenderPipelineDescriptor()
+//        pipelineStateDescriptor.vertexFunction = vertexProgram
+//        pipelineStateDescriptor.fragmentFunction = fragmentProgram
+//        pipelineStateDescriptor.colorAttachments[0].pixelFormat = .bgra8Unorm
+            
+        // 3
+//        pipelineState = try! device.makeRenderPipelineState(descriptor: pipelineStateDescriptor)
+        
+        commandQueue = device.makeCommandQueue()
+        
+        mtlBufferA = device.makeBuffer(bytes: HiResRawPointer, length: HiRes.PageSize, options: .storageModeShared)
+        mtlBufferB = device.makeBuffer(bytes: HiResRawPointer, length: HiRes.PageSize, options: .storageModeShared)
+        mtlBufferC = device.makeBuffer(length: HiRes.PageSize * 4, options: .storageModeShared)
+
+        var displayLink : CVDisplayLink!
+        let displayID = CGMainDisplayID()
+        let error = CVDisplayLinkCreateWithCGDisplay(displayID, &displayLink)
+        
+//        timer = CVDisplayLink(   (target: self, selector: #selector(gameloop))
+//        timer.add(to: RunLoop.main, forMode: .default)
+        
+//        CVDisplayLinkSetOutputCallback(displayLink!, renderCallback as? CVDisplayLinkOutputCallback, UnsafeMutableRawPointer( Unmanaged.passUnretained(self).toOpaque() ))
+//        CVDisplayLinkStart(displayLink!)
+
+    }
+    #endif // METAL_YES
     
+    var HiResSubView = [[NSView]]()
+    
+    func createHiRes() {
+        for y in 0 ..< HiRes.blockRows {
+            HiResSubView.append([NSView]())
+            for x in 0 ..< HiRes.blockCols {
+                let blockView = NSView(frame: NSRect(x: x * HiRes.blockWidth, y: y * 8, width: HiRes.blockWidth, height: 8))
+                HiResSubView[y].append(blockView)
+                self.addSubview(blockView)
+            }
+        }
+    }
+
+
     required init?(coder aDecoder: NSCoder) {
         super.init(coder: aDecoder)
         initHiResLineAddresses()
         
-        
-        let scaleSizeW = Double((frame.size).width) / Double(HiRes.PixelWidth)
-        let scaleSizeH = Double((frame.size).height) / Double(HiRes.PixelHeight)
+//        let scaleSizeW = Double((frame.size).width) / Double(HiRes.PixelWidth)
+//        let scaleSizeH = Double((frame.size).height) / Double(HiRes.PixelHeight)
+        let scaleSizeW = 2
+        let scaleSizeH = 2
         scaleUnitSquare(to: NSSize(width: scaleSizeW, height: scaleSizeH))
         
+        // create smaller box views for draw optimization
+//        createHiRes()
+        
+        #if METAL_YES
+        initMetal()
+        #endif
     }
     
     override init(frame: CGRect) {
@@ -54,20 +149,198 @@ class HiRes: NSView {
     }
     
     
+    #if METAL_YES
+    func compute() {
+        let commandBuffer = commandQueue.makeCommandBuffer()!
+        let computeEncoder = commandBuffer.makeComputeCommandEncoder()
+
+        computeEncoder?.setComputePipelineState(computePipelineState)
+        computeEncoder?.setBuffer(mtlBufferA, offset: 0, index: 0)
+        computeEncoder?.setBuffer(mtlBufferA, offset: 0, index: 1)
+        computeEncoder?.setBuffer(mtlBufferC, offset: 0, index: 2)
+        
+        let gridSize = MTLSizeMake(HiRes.PageSize, 1, 1)
+        let threadGroupSize = min( computePipelineState.maxTotalThreadsPerThreadgroup, HiRes.PageSize )
+        let threadgroupSize = MTLSizeMake(threadGroupSize, 1, 1)
+        // Encode the Compute Command to Execute the Threads
+        computeEncoder?.dispatchThreadgroups(gridSize, threadsPerThreadgroup: threadgroupSize)
+        // no more compute passes
+        computeEncoder?.endEncoding()
+        // Commit the Command Buffer to Execute Its Commands
+        commandBuffer.commit()
+        // Wait for the Calculation to Complete
+        commandBuffer.waitUntilCompleted()
+        // Alternatively, to be notified when Metal has processed all of the commands,
+        // add a completion handler to the command buffer (addCompletedHandler(_:)),
+        // or check the status of a command buffer by reading its status property
+        
+        let result = UnsafeRawBufferPointer(start: mtlBufferC.contents(), count: HiRes.PageSize)
+    }
+
+
+    func render() {
+        guard let drawable = metalLayer?.nextDrawable() else { return }
+        let renderPassDescriptor = MTLRenderPassDescriptor()
+        renderPassDescriptor.colorAttachments[0].texture = drawable.texture
+        renderPassDescriptor.colorAttachments[0].loadAction = .clear
+        renderPassDescriptor.colorAttachments[0].clearColor = MTLClearColor(
+            red: 0.0,
+            green: 104.0/255.0,
+            blue: 55.0/255.0,
+            alpha: 1.0)
+        
+        let commandBuffer = commandQueue.makeCommandBuffer()!
+        
+        let renderEncoder = commandBuffer.makeRenderCommandEncoder(descriptor: renderPassDescriptor)!
+        renderEncoder.setRenderPipelineState(renderPipelineState)
+        renderEncoder.setVertexBuffer(vertexBuffer, offset: 0, index: 0)
+        renderEncoder.drawPrimitives(type: .triangle, vertexStart: 0, vertexCount: 3, instanceCount: 1)
+        renderEncoder.endEncoding()
+        
+        // committing buffer
+        commandBuffer.present(drawable)
+        commandBuffer.commit()
+    }
+    #endif // METAL_YES
+
+    //    @objc func gameloop() {
+    //      autoreleasepool {
+    //        self.render()
+    //      }
+    //    }
+
+    func renderCallback(displayLink : CVDisplayLink,
+                               const  inNow : UnsafePointer<CVTimeStamp>,
+                               const  inOutputTime : UnsafePointer<CVTimeStamp>,
+                               flagsIn : CVOptionFlags,
+                               flagsOut : UnsafeMutablePointer<CVOptionFlags>,
+                               displayLinkContext : UnsafeMutableRawPointer) -> CVReturn
+    {
+        /*  It's prudent to also have a brief discussion about the CVTimeStamp.
+            CVTimeStamp has five properties.  Three of the five are very useful
+            for keeping track of the current time, calculating delta time, the
+            frame number, and the number of frames per second.  The utility of
+            each property is not terribly obvious from just reading the names
+            or the descriptions in the Developer dcumentation and has been a
+            mystery to many a developer.  Thankfully, CaptainRedmuff on
+            StackOverflow asked a question that provided the equation that
+            calculates frames per second.  From that equation, we can
+            extrapolate the value of each field.
+
+            @hostTime = current time in Units of the "root".  Yeah, I don't know.
+              The key to this field is to understand that it is in nanoseconds
+              (e.g. 1/1_000_000_000 of a second) not units.  To convert it to
+              seconds divide by 1_000_000_000.  Dividing by videoRefreshPeriod
+              and videoTimeScale in a calculation for frames per second yields
+              the appropriate number of frames.  This works as a result of
+              proportionality--dividing seconds by seconds.  Note that dividing
+              by videoTimeScale to get the time in seconds does not work like it
+              does for videoTime.
+
+              framesPerSecond:
+                (videoTime / videoRefreshPeriod) / (videoTime / videoTimeScale) = 59
+              and
+                (hostTime / videoRefreshPeriod) / (hostTime / videoTimeScale) = 59
+              but
+                hostTime * videoTimeScale ≠ seconds, but Units = seconds * (Units / seconds) = Units
+
+          @rateScalar = ratio of "rate of device in CVTimeStamp/unitOfTime" to
+            the "Nominal Rate".  I think the "Nominal Rate" is
+            videoRefreshPeriod, but unfortunately, the documentation doesn't
+            just say videoRefreshPeriod is the Nominal rate and then define
+            what that means.  Regardless, because this is a ratio, and the fact
+            that we know the value of one of the parts (e.g. Units/frame), we
+            then know that the "rate of the device" is frame/Units (the units of
+            measure need to cancel out for the ratio to be a ratio).  This
+            makes sense in that rateScalar's definition tells us the rate is
+            "measured by timeStamps".  Since there is a frame for every
+            timeStamp, the rate of the device equals CVTimeStamp/Unit or
+            frame/Unit.  Thus,
+
+              rateScalar = frame/Units : Units/frame
+
+          @videoTime = the time the frame was created since computer started up.
+            If you turn your computer off and then turn it back on, this timer
+            returns to zero.  The timer is paused when you put your computer to
+            sleep.  This value is in Units not seconds.  To get the number of
+            seconds this value represents, you have to apply videoTimeScale.
+
+          @videoRefreshPeriod = the number of Units per frame (i.e. Units/frame)
+            This is useful in calculating the frame number or frames per second.
+            The documentation calls this the "nominal update period" and I am
+            pretty sure that is quivalent to the aforementioned "nominal rate".
+            Unfortunately, the documetation mixes naming conventions and this
+            inconsistency creates confusion.
+
+              frame = videoTime / videoRefreshPeriod
+
+          @videoTimeScale = Units/second, used to convert videoTime into seconds
+            and may also be used with videoRefreshPeriod to calculate the expected
+            framesPerSecond.  I say expected, because videoTimeScale and
+            videoRefreshPeriod don't change while videoTime does change.  Thus,
+            to calculate fps in the case of system slow down, one would need to
+            use videoTime with videoTimeScale to calculate the actual fps value.
+
+              seconds = videoTime / videoTimeScale
+
+              framesPerSecondConstant = videoTimeScale / videoRefreshPeriod (this value does not change if their is system slowdown)
+
+        USE CASE 1: Time in DD:HH:mm:ss using hostTime
+          let rootTotalSeconds = inNow.pointee.hostTime
+          let rootDays = inNow.pointee.hostTime / (1_000_000_000 * 60 * 60 * 24) % 365
+          let rootHours = inNow.pointee.hostTime / (1_000_000_000 * 60 * 60) % 24
+          let rootMinutes = inNow.pointee.hostTime / (1_000_000_000 * 60) % 60
+          let rootSeconds = inNow.pointee.hostTime / 1_000_000_000 % 60
+          Swift.print("rootTotalSeconds: \(rootTotalSeconds) rootDays: \(rootDays) rootHours: \(rootHours) rootMinutes: \(rootMinutes) rootSeconds: \(rootSeconds)")
+
+        USE CASE 2: Time in DD:HH:mm:ss using videoTime
+          let totalSeconds = inNow.pointee.videoTime / Int64(inNow.pointee.videoTimeScale)
+          let days = (totalSeconds / (60 * 60 * 24)) % 365
+          let hours = (totalSeconds / (60 * 60)) % 24
+          let minutes = (totalSeconds / 60) % 60
+          let seconds = totalSeconds % 60
+          Swift.print("totalSeconds: \(totalSeconds) Days: \(days) Hours: \(hours) Minutes: \(minutes) Seconds: \(seconds)")
+
+          Swift.print("fps: \(Double(inNow.pointee.videoTimeScale) / Double(inNow.pointee.videoRefreshPeriod)) seconds: \(Double(inNow.pointee.videoTime) / Double(inNow.pointee.videoTimeScale))")
+         */
+
+        /*  The displayLinkContext in CVDisplayLinkOutputCallback's parameter list is the
+            view being driven by the CVDisplayLink.  In order to use the context as an
+            instance of SwiftOpenGLView (which has our drawView() method) we need to use
+            unsafeBitCast() to cast this context to a SwiftOpenGLView.
+         */
+
+//        let view = unsafeBitCast(displayLinkContext, to: SwiftOpenGLView.self)
+//        //  Capture the current time in the currentTime property.
+//        view.currentTime = inNow.pointee.videoTime / Int64(inNow.pointee.videoTimeScale)
+//        view.drawView()
+
+//        self.render()
+        
+        return kCVReturnSuccess
+    }
+    
     static func createBitmapContext(pixelsWide: Int, _ pixelsHigh: Int) -> CGContext? {
         let bytesPerPixel = 4
         let bytesPerRow = bytesPerPixel * pixelsWide
-        let bitsPerComponent = 8
         
         let byteCount = (bytesPerRow * pixelsHigh)
         
-        guard let colorSpace = CGColorSpace(name: CGColorSpace.linearSRGB) else { return nil }
-        
+//        guard let colorSpace = CGColorSpace(name: CGColorSpace.linearSRGB) else { return nil }
+        guard let colorSpace = CGColorSpace(name: CGColorSpace.genericRGBLinear) else { return nil }
+
         let pixels = UnsafeMutablePointer<CUnsignedChar>.allocate(capacity: byteCount)
 
         let bitmapInfo = CGImageAlphaInfo.premultipliedFirst.rawValue | CGBitmapInfo.byteOrder32Little.rawValue
         
-        let context = CGContext(data: pixels, width: pixelsWide, height: pixelsHigh, bitsPerComponent: bitsPerComponent, bytesPerRow: bytesPerRow, space: colorSpace, bitmapInfo: bitmapInfo)
+        let context = CGContext(
+            data: pixels,
+            width: pixelsWide,
+            height: pixelsHigh,
+            bitsPerComponent: 8,
+            bytesPerRow: bytesPerRow,
+            space: colorSpace,
+            bitmapInfo: bitmapInfo)
         
         return context
     }
@@ -106,11 +379,12 @@ class HiRes: NSView {
         }
     }
 
+    #if HIRESLOW
+    static let ScreenBitmapSize = (PixelWidth * PixelHeight * 4)
+    static let context = createBitmapContext(pixelsWide: PixelWidth, PixelHeight)
+    static let pixels = UnsafeMutableRawBufferPointer(start: context?.data, count: ScreenBitmapSize)  // UnsafeMutablePointer<CUnsignedChar>.allocate(capacity: byteCount)
+    #endif
     
-    static let byteCount = (HiRes.PixelWidth * HiRes.PixelHeight * 4)
-    static let context = createBitmapContext(pixelsWide: HiRes.PixelWidth, HiRes.PixelHeight)
-    static let pixels = UnsafeMutableRawBufferPointer(start: context?.data, count: byteCount)  // UnsafeMutablePointer<CUnsignedChar>.allocate(capacity: byteCount)
-
     let R = 2
     let G = 1
     let B = 0
@@ -118,25 +392,35 @@ class HiRes: NSView {
     
     var shadowScreen = [Int](repeating: 1, count: PageSize)
 
+    var was = 0;
+    
+    #if HIRESLOW
     override func draw(_ rect: CGRect) {
+        // print("HIRESSLOW\n")
+
+//        if was > 100 {
+//            return
+//        }
+//        was += 1
+
         var pixelAddr = 0
-        
-        var minX = 0
-        var minY = 0
+
+        var minX = 9999
+        var minY = 9999
         var maxX = 0
         var maxY = 0
 
         var x = 0
         var y = 0
-        
+
         for lineAddr in HiResLineAddrTbl {
-            for blockAddr in 0..<UInt16(HiRes.LineBlocks) {
+            for blockAddr in 0..<HiRes.blockCols {
                 let block = Int(HiResBufferPointer[ Int(lineAddr + blockAddr) ])
-                let screenIdx = y * HiRes.LineBlocks + x
+                let screenIdx = y * HiRes.blockCols + x
 
                 if ( shadowScreen[ screenIdx ] != block ) {
                     shadowScreen[ screenIdx ] = block
-                    
+
                     for bit in stride(from: 0, through: 6, by: 1) {
                         let bitMask = 1 << bit
                         if (block & bitMask) == 0 {
@@ -149,14 +433,14 @@ class HiRes: NSView {
                             HiRes.pixels[pixelAddr + R] = 0x08;
                             HiRes.pixels[pixelAddr + G] = 0xA2;
                             HiRes.pixels[pixelAddr + B] = 0x12;
-                            HiRes.pixels[pixelAddr + A] = 0xFF;
+                            HiRes.pixels[pixelAddr + A] = 0x7F;
                         }
-                        
-                        if ( minX == 0 ) { minX = x }
-                        if ( minY == 0 ) { minY = y }
+
+                        if ( minX > x ) { minX = x }
+                        if ( minY > y ) { minY = y }
                         if ( maxX < x ) { maxX = x }
                         if ( maxY < y ) { maxY = y }
-                        
+
                         pixelAddr += 4
                         x += 1
                     }
@@ -166,21 +450,133 @@ class HiRes: NSView {
                     x += 7
                 }
             }
-            
+
             y += 1
             x = 0
         }
 
         guard let image = HiRes.context?.makeImage() else { return }
-
-        if let currentContext: CGContext = currentContext {
-//            UIImagePNGRepresentation(UIImage(CGImage:image!))?.writeToFile("/Users/admin/Desktop/aaaaa.png", atomically: true)
-//            if ( maxX > minX ) && ( maxY > minY ) {
-                let boundingBox = CGRect(x: 0, y: 0, width: CGFloat(HiRes.PixelWidth), height: CGFloat(HiRes.PixelHeight))
-//                let boundingBox = CGRect(x: minX, y: minY, width: maxX - minX, height: maxY - minY)
-                currentContext.draw  (image, in: boundingBox)
-//            }
-        }
+        let boundingBox = CGRect(x: 0, y: 0, width: CGFloat(HiRes.PixelWidth), height: CGFloat(HiRes.PixelHeight))
+        currentContext!.draw  (image, in: boundingBox)
     }
+    #elseif HIRESDRAW
+    override func draw(_ rect: CGRect) {
+//        NSColor.green.setFill()
+        NSColor(calibratedRed: 0.0314, green: 0.635, blue: 0.071, alpha: 0.5).setStroke()
+
+        let path = NSBezierPath()
+        path.lineWidth=1
+        path.move(to: NSPoint(x: 0, y: 0))
+        
+//        path.appendRect(NSRect(x: 0, y: 0, width: 10, height: 10))
+
+        for y in 0 ..< HiRes.PixelHeight {
+            var inX = false
+            path.move(to: NSPoint(x: 0, y: y))
+
+            for blockX in 0 ..< HiRes.blockCols {
+                
+                let lineAddr = HiResLineAddrTbl[y]
+                let block = Int(HiResBufferPointer[ Int(lineAddr + blockX) ])
+
+    //                    if( shadowScreen[ screenIdx ] != block ) {
+    //                        shadowScreen[ screenIdx ] = block
+    //
+                var x = blockX * HiRes.blockWidth
+                for bit in stride(from: 0, through: 6, by: 1) {
+                    let bitMask = 1 << bit
+                    if (block & bitMask) == 0 {
+                        if inX {
+                            inX = false
+                            path.line(to: NSPoint(x: x, y: 192-y))
+                        }
+                    }
+                    else { // 28CD41
+                        if ( inX == false ) {
+                            inX = true
+                            path.move(to: NSPoint(x: x, y: 192-y))
+                        }
+                    }
+                    
+                    x += 1
+                }
+            } // x
+            if inX {
+                inX = false
+                path.line(to: NSPoint(x: 279, y: 192-y))
+            }
+        }
+//        path.fill()
+        path.stroke()
+
+    }
+    #elseif HIRES
+    override func draw(_ rect: CGRect) {
+        
+        // print("HIRESBLOCKS\n")
+        
+//        if was > 100 {
+//            return
+//        }
+//        was += 1
+        
+        for blockY in 0 ..< HiRes.blockRows {
+            for blockX in 0 ..< HiRes.blockCols {
+                let blockView = HiResSubView[blockY][blockX]
+                
+                let bitmapSize = HiRes.blockWidth * HiRes.blockHeight * 4
+                let context = HiRes.createBitmapContext(pixelsWide: HiRes.blockWidth, HiRes.blockHeight)
+                let pixels = UnsafeMutableRawBufferPointer(start: context?.data, count: bitmapSize)  // UnsafeMutablePointer<CUnsignedChar>.allocate(capacity: byteCount)
+
+
+                var blockNeedsDisplay = false
+                for line in 0 ... 7 {
+                    let y = blockY + line
+                    let screenIdx = y * HiRes.blockCols + blockX
+                    let pixelAddr = line
+
+                    let lineAddr = HiResLineAddrTbl[y]
+                    let block = Int(HiResBufferPointer[ Int(lineAddr + blockX) ])
+
+                    if( shadowScreen[ screenIdx ] != block ) {
+                        shadowScreen[ screenIdx ] = block
+
+                        blockNeedsDisplay = true
+
+                        var x = blockX * HiRes.blockWidth
+                        for bit in stride(from: 0, through: 6, by: 1) {
+                            let bitMask = 1 << bit
+                            if (block & bitMask) == 0 {
+                                pixels[pixelAddr + R] = 0x00;
+                                pixels[pixelAddr + G] = 0x00;
+                                pixels[pixelAddr + B] = 0x00;
+                                pixels[pixelAddr + A] = 0x00;
+                            }
+                            else { // 28CD41
+                                pixels[pixelAddr + R] = 0x08;
+                                pixels[pixelAddr + G] = 0xA2;
+                                pixels[pixelAddr + B] = 0x12;
+                                pixels[pixelAddr + A] = 0x7F;
+                            }
+                            
+                            x += 1
+                        }
+                    }
+                }
+
+                if blockNeedsDisplay {
+                    blockView.needsDisplay = true
+//                    print("block(\(blockX),\(blockY))")
+                    guard let image = context?.makeImage() else { return }
+                    let boundingBox = CGRect(x: 0, y: 0, width: CGFloat(HiRes.PixelWidth), height: CGFloat(HiRes.PixelHeight))
+                    currentContext!.draw(image, in: boundingBox)
+                }
+
+            }
+        }
+
+    }
+    #endif
+
     
 }
diff --git a/A2Mac/MonitorView.swift b/A2Mac/MonitorView.swift
index 3af0305..a6920e7 100644
--- a/A2Mac/MonitorView.swift
+++ b/A2Mac/MonitorView.swift
@@ -8,7 +8,7 @@
 
 import Cocoa
 
-class QuietView: NSView {
+class MonitorView: NSView {
     override func performKeyEquivalent(with event: NSEvent) -> Bool {
         return true
     }
diff --git a/A2Mac/Shaders.metal b/A2Mac/Shaders.metal
new file mode 100644
index 0000000..707de46
--- /dev/null
+++ b/A2Mac/Shaders.metal
@@ -0,0 +1,34 @@
+//
+//  Shaders.metal
+//  A2Mac
+//
+//  Created by Tamas Rudnai on 9/27/19.
+//  Copyright © 2019 GameAlloy. All rights reserved.
+//
+
+#include <metal_stdlib>
+using namespace metal;
+
+
+vertex float4 basic_vertex(                           // 1
+  const device packed_float3* vertex_array [[ buffer(0) ]], // 2
+  unsigned int vid [[ vertex_id ]]) {                 // 3
+  return float4(vertex_array[vid], 1.0);              // 4
+}
+
+fragment half4 basic_fragment() { // 1
+  return half4(0.7);              // 2
+}
+
+
+kernel void add_arrays(device const float* inA,
+                       device const float* inB,
+                       device float* result,
+                       uint index [[thread_position_in_grid]])
+{
+    // the for-loop is replaced with a collection of threads, each of which
+    // calls this function.
+    result[index] = inA[index] + inB[index] + 1;
+}
+
+
diff --git a/A2Mac/ViewController.swift b/A2Mac/ViewController.swift
index 468dea1..6256a03 100644
--- a/A2Mac/ViewController.swift
+++ b/A2Mac/ViewController.swift
@@ -8,12 +8,17 @@
 
 import Cocoa
 
+#if METAL_YES
+import Metal
+#endif
+
 class ViewController: NSViewController {
 
     @IBOutlet weak var displayField: NSTextField!
     @IBOutlet weak var display: NSTextFieldCell!
     @IBOutlet weak var speedometer: NSTextFieldCell!
-    @IBOutlet weak var HiRes: HiRes!
+    @IBOutlet weak var hires: HiRes!
+    
     
 //    static let charConvStr : String =
 //        "@🄰🄱🄲🄳🄴🄵🄶🄷🄸🄹🄺🄻🄼🄽🄾🄿🅀🅁🅂🅃🅄🅅🅆🅇🅈🅉[\\]^_ !\"#$%&'()*+,-./0123456789:;<=>?" +
@@ -73,7 +78,7 @@ class ViewController: NSViewController {
             DispatchQueue.global().async(execute: workItem!);
         }
         #else
-        m6502_Reset()
+        m6502_ColdReset()
         #endif
     }
     
@@ -171,7 +176,6 @@ class ViewController: NSViewController {
 //        }
 //    }
 
-    
     static let textBaseAddr = 0x400
     static let textBufferSize = 0x400
     let textLines = 24
@@ -185,8 +189,8 @@ class ViewController: NSViewController {
     let blockChar : Character = "░"
     var flashingSpace : Character = " "
     
-    let ramBufferPointer = UnsafeRawBufferPointer(start: &RAM, count: 64 * 1024)
-    let textBufferPointer = UnsafeRawBufferPointer(start: &RAM + textBaseAddr, count: textBufferSize)
+    let ramBufferPointer = UnsafeRawBufferPointer(start: RAM, count: 64 * 1024)
+    let textBufferPointer = UnsafeRawBufferPointer(start: RAM + textBaseAddr, count: textBufferSize)
     var txtArr = [Character](repeating: " ", count: textBufferSize)
     
     var s = String()
@@ -210,6 +214,9 @@ class ViewController: NSViewController {
         }
     }
     
+    
+    var was = 0;
+    
     func Update() {
 
         #if SPEEDTEST
@@ -217,6 +224,9 @@ class ViewController: NSViewController {
         m6502_Run()
         #endif
         
+//        render()
+//        hires.compute()
+        
 //        HexDump()
 //        return
         
@@ -273,16 +283,31 @@ class ViewController: NSViewController {
 
         DispatchQueue.main.async {
             self.display.stringValue = txt
+//            self.display.stringValue = "testing\nit\nout"
+
             if ( mhz < 10 ) {
                 self.speedometer.stringValue = String(format: "%0.3lf MHz", mhz);
             }
             else {
                 self.speedometer.stringValue = String(format: "%.0lf MHz", mhz);
             }
-//            self.HiRes.setNeedsDisplay(self.HiRes.frame)
-//            self.HiRes.setNeedsDisplay(CGRect(x: 0, y: 191-50, width: 50, height: 50))
             
-//            self.HiRes.needsDisplay = true
+            #if HIRES
+//            if ( self.was < 300 ) {
+//                self.was += 1
+//
+//                for x in stride(from: 0, to: 280, by: 7) {
+//                    for y in stride(from: 0, to: 192, by: 8) {
+//                        self.hires.setNeedsDisplay( CGRect(x: x, y: y, width: 7, height: 8) )
+//                    }
+//                }
+//            }
+            
+//                self.HiRes.setNeedsDisplay(self.HiRes.frame)
+//            self.hires.setNeedsDisplay( CGRect(x: 0, y: 191-50, width: 50, height: 50) )
+            self.hires.needsDisplay = true
+//            }
+            #endif
         }
     }
 
@@ -295,13 +320,17 @@ class ViewController: NSViewController {
 //            return nil // the bytes aren't valid UTF8
 //        }
 //    }
-
+    
     
     let upd = RepeatingTimer(timeInterval: 1/Double(fps))
     
     override func viewDidLoad() {
         super.viewDidLoad()
         
+        //view.frame = CGRect(origin: CGPoint(), size: NSScreen.main!.visibleFrame.size)
+                
+//        createHiRes()
+        
         self.displayField.scaleUnitSquare(to: NSSize(width: 1, height: 1))
         
 //        NSEvent.removeMonitor(NSEvent.EventType.flagsChanged)
@@ -309,12 +338,13 @@ class ViewController: NSViewController {
 //            self.flagsChanged(with: $0)
 //            return $0
 //        }
-//        NSEvent.removeMonitor(NSEvent.EventType.keyDown)
-        NSEvent.addLocalMonitorForEvents(matching: .keyDown) {
-//            print("keyDown event")
-            self.keyDown(with: $0)
-            return $0
-        }
+
+//        //        NSEvent.removeMonitor(NSEvent.EventType.keyDown)
+//        NSEvent.addLocalMonitorForEvents(matching: .keyDown) {
+////            print("keyDown event")
+//            self.keyDown(with: $0)
+//            return $0
+//        }
         
         displayField.maximumNumberOfLines = textLines
         displayField.preferredMaxLayoutWidth = displayField.frame.width
diff --git a/A2Mac/disassembler.h b/A2Mac/disassembler.h
index f9dbfcc..b68b3dd 100644
--- a/A2Mac/disassembler.h
+++ b/A2Mac/disassembler.h
@@ -9,54 +9,51 @@
 #ifndef disassembler_h
 #define disassembler_h
 
-#define NO_DISASSEMBLER
-
-
 #ifdef DISASSEMBLER
 
 #define disHexB( to, b ) \
-    if ( m6502.dbgLevel >= DISASSEMBLY ) { \
+    if ( m6502.dbgLevel.trace ) { \
         snprintf((to), 4, "%02X ", (b)); \
         to += 3; \
     }
 
 #define disHexW( to, w ) \
-    if ( m6502.dbgLevel >= DISASSEMBLY ) { \
+    if ( m6502.dbgLevel.trace ) { \
         snprintf((to), 6, "%04X ", (w)); \
         to += 5; \
     }
 
 #define disPuts( to, from ) { \
     char * s = from; \
-    if ( m6502.dbgLevel >= DISASSEMBLY ) { \
+    if ( m6502.dbgLevel.trace ) { \
         while ( (*(to)++ = *s++) ); \
     } \
 }
 
 #define disPrintf( to, fmt, args... ) { \
-    if ( m6502.dbgLevel >= DISASSEMBLY ) { \
+    if ( m6502.dbgLevel.trace ) { \
         snprintf( (to), sizeof(to), fmt, ##args ); \
     } \
 }
 
 #define disNewInstruction() { \
-    if ( m6502.dbgLevel >= DISASSEMBLY ) { \
-        disassembly.pHex = disassembly.hex; \
-        *disassembly.hex = '\0'; \
+    if ( m6502.dbgLevel.trace ) { \
+        snprintf(disassembly.addr, 5, "%04X ", m6502.PC); \
+        *disassembly.opcode = '\0'; \
+        disassembly.pOpcode = disassembly.opcode; \
         *disassembly.inst = '\0'; \
-        *disassembly.addr = '\0'; \
+        *disassembly.oper = '\0'; \
         *disassembly.comment = '\0'; \
-        snprintf(disassembly.codeAddr, 5, "%04X ", m6502.PC); \
     } \
 }
 
 INLINE void printDisassembly() {
-    if ( m6502.dbgLevel >= DISASSEMBLY ) {
+    if ( m6502.dbgLevel.trace ) {
         printf("%s: %-14s%-6s%-14s%s\n",
-               disassembly.codeAddr,
-               disassembly.hex,
-               disassembly.inst,
                disassembly.addr,
+               disassembly.opcode,
+               disassembly.inst,
+               disassembly.oper,
                disassembly.comment
                );
     }
diff --git a/A2Mac/instructions/6502_instr_branch.h b/A2Mac/instructions/6502_instr_branch.h
index 6e923eb..8235822 100644
--- a/A2Mac/instructions/6502_instr_branch.h
+++ b/A2Mac/instructions/6502_instr_branch.h
@@ -52,7 +52,7 @@ INLINE void BCC( int8_t reladdr ) {
  **/
 INLINE void BCS( int8_t reladdr ) {
     dbgPrintf("BCS ");
-    disPrintf(disassembly.inst, "RCS");
+    disPrintf(disassembly.inst, "BCS");
     if ( m6502.C == 1 ) {
         BRA( reladdr );
     }
diff --git a/A2Mac/instructions/6502_instr_misc.h b/A2Mac/instructions/6502_instr_misc.h
index c9c3319..868762a 100644
--- a/A2Mac/instructions/6502_instr_misc.h
+++ b/A2Mac/instructions/6502_instr_misc.h
@@ -28,7 +28,7 @@ INLINE void BRK() {
     m6502.B = 1;
     PUSH(m6502.SR);
     m6502.I = 1;
-    JMP(memread16(IRQ_VECTOR));
+    m6502.PC = memread16(IRQ_VECTOR);
 }
 
 /**
diff --git a/A2Mac/verticies.swift b/A2Mac/verticies.swift
new file mode 100644
index 0000000..5414c3b
--- /dev/null
+++ b/A2Mac/verticies.swift
@@ -0,0 +1,1036 @@
+//
+//  verticies.swift
+//  A2Mac
+//
+//  Created by Tamas Rudnai on 9/28/19.
+//  Copyright © 2019 GameAlloy. All rights reserved.
+//
+
+import Foundation
+
+let vertexData: [Float] = [
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
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+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+      0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+   0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+0.0,  1.0, 0.0,   -1.0, -1.0, 0.0,   1.0, -1.0, 0.0,
+]
diff --git a/A2Mac/woz.h b/A2Mac/woz.h
new file mode 100644
index 0000000..e1c303c
--- /dev/null
+++ b/A2Mac/woz.h
@@ -0,0 +1,56 @@
+//
+//  woz1.h
+//  A2Mac
+//
+//  Created by Tamas Rudnai on 11/18/19.
+//  Copyright © 2019 GameAlloy. All rights reserved.
+//
+
+#ifndef woz_h
+#define woz_h
+
+
+typedef struct woz_header_s {
+    uint32_t    magic;
+    uint8_t     no7;
+    char        lineend [3];
+    uint32_t    crc;
+} woz_header_t;
+
+typedef struct woz_chunk_header_s {
+    uint32_t    magic;
+    uint32_t    size;
+} woz_chunk_header_t;
+
+// chunk data only
+typedef struct woz_info_s {
+    uint8_t     version;
+    uint8_t     disk_type;              // 1 = 5.25, 2 = 3.5
+    uint8_t     is_write_protected;
+    uint8_t     sync;                   // 1 = Cross track sync
+    uint8_t     cleaned;                // 1 = MC3470 fake bits removed
+    char        creator [32];           // Name of software created this file (UTF-8, 0x20 padded, NOT zero terminated)
+} woz_info_t;
+
+// chunk data only
+typedef struct woz_tmap_s {
+    uint8_t     phase [80 * 4];
+} woz_tmap_t;
+
+#define WOZ_TRACK_BYTE_COUNT 6646
+// chunk data only
+typedef struct woz_track_s {
+    uint8_t     data [WOZ_TRACK_BYTE_COUNT];
+    uint16_t    bytes_used;
+    uint16_t    bit_count;
+    uint16_t    splice_point;
+    uint8_t     splice_nibble;
+    uint8_t     splice_bit_count;
+    uint16_t    reserved;
+} woz_track_t;
+
+// chunk data only
+typedef woz_track_t woz_trks_t[80];
+
+
+#endif /* woz_h */