patching together more mouse work

Makefile

@@ -8,17 +8,17 @@ CXXFLAGS=-Wall -I/usr/include/SDL2 -I .. -I . -I apple -I nix -I sdl -I/usr/loca
 
 TSRC=cpu.cpp util/testharness.cpp
 
-COMMONSRCS=cpu.cpp apple/appledisplay.cpp apple/applekeyboard.cpp apple/applemmu.cpp apple/applevm.cpp apple/diskii.cpp apple/nibutil.cpp LRingBuffer.cpp globals.cpp apple/parallelcard.cpp apple/fx80.cpp lcg.cpp apple/hd32.cpp images.cpp apple/appleui.cpp vmram.cpp bios.cpp apple/noslotclock.cpp apple/woz.cpp apple/crc32.c apple/woz-serializer.cpp
+COMMONSRCS=cpu.cpp apple/appledisplay.cpp apple/applekeyboard.cpp apple/applemmu.cpp apple/applevm.cpp apple/diskii.cpp apple/nibutil.cpp LRingBuffer.cpp globals.cpp apple/parallelcard.cpp apple/fx80.cpp lcg.cpp apple/hd32.cpp images.cpp apple/appleui.cpp vmram.cpp bios.cpp apple/noslotclock.cpp apple/woz.cpp apple/crc32.c apple/woz-serializer.cpp apple/mouse.c
 
-COMMONOBJS=cpu.o apple/appledisplay.o apple/applekeyboard.o apple/applemmu.o apple/applevm.o apple/diskii.o apple/nibutil.o LRingBuffer.o globals.o apple/parallelcard.o apple/fx80.o lcg.o apple/hd32.o images.o apple/appleui.o vmram.o bios.o apple/noslotclock.o apple/woz.o apple/crc32.o apple/woz-serializer.o apple/mouse.o apple/pia6821.o
+COMMONOBJS=cpu.o apple/appledisplay.o apple/applekeyboard.o apple/applemmu.o apple/applevm.o apple/diskii.o apple/nibutil.o LRingBuffer.o globals.o apple/parallelcard.o apple/fx80.o lcg.o apple/hd32.o images.o apple/appleui.o vmram.o bios.o apple/noslotclock.o apple/woz.o apple/crc32.o apple/woz-serializer.o apple/mouse.o
 
 FBSRCS=linuxfb/linux-speaker.cpp linuxfb/fb-display.cpp linuxfb/linux-keyboard.cpp linuxfb/fb-paddles.cpp nix/nix-filemanager.cpp linuxfb/aiie.cpp linuxfb/linux-printer.cpp nix/nix-clock.cpp nix/nix-prefs.cpp
 
 FBOBJS=linuxfb/linux-speaker.o linuxfb/fb-display.o linuxfb/linux-keyboard.o linuxfb/fb-paddles.o nix/nix-filemanager.o linuxfb/aiie.o linuxfb/linux-printer.o nix/nix-clock.o nix/nix-prefs.o
 
-SDLSRCS=sdl/sdl-speaker.cpp sdl/sdl-display.cpp sdl/sdl-keyboard.cpp sdl/sdl-paddles.cpp nix/nix-filemanager.cpp sdl/aiie.cpp sdl/sdl-printer.cpp nix/nix-clock.cpp nix/nix-prefs.cpp nix/debugger.cpp nix/disassembler.cpp
+SDLSRCS=sdl/sdl-speaker.cpp sdl/sdl-display.cpp sdl/sdl-keyboard.cpp sdl/sdl-paddles.cpp nix/nix-filemanager.cpp sdl/aiie.cpp sdl/sdl-printer.cpp nix/nix-clock.cpp nix/nix-prefs.cpp nix/debugger.cpp nix/disassembler.cpp sdl/sdl-mouse.cpp
 
-SDLOBJS=sdl/sdl-speaker.o sdl/sdl-display.o sdl/sdl-keyboard.o sdl/sdl-paddles.o nix/nix-filemanager.o sdl/aiie.o sdl/sdl-printer.o nix/nix-clock.o nix/nix-prefs.o nix/debugger.o nix/disassembler.o
+SDLOBJS=sdl/sdl-speaker.o sdl/sdl-display.o sdl/sdl-keyboard.o sdl/sdl-paddles.o nix/nix-filemanager.o sdl/aiie.o sdl/sdl-printer.o nix/nix-clock.o nix/nix-prefs.o nix/debugger.o nix/disassembler.o sdl/sdl-mouse.o
 
 ROMS=apple/applemmu-rom.h apple/diskii-rom.h apple/parallel-rom.h apple/hd32-rom.h MouseInterface.rom
 

apple/mouse.cpp

@@ -5,6 +5,7 @@
 #include "mouse-rom.h"
 
 enum {
+  SW_W_INIT       = 0x00,
   SW_R_HOMEMOUSE  = 0x08,
   SW_R_POSMOUSE   = 0x09,
   SW_R_CLEARMOUSE = 0x0A,
@@ -15,6 +16,11 @@ enum {
   SW_W_SETMOUSE   = 0x0F
 };
 
+// The first 3 soft switch bits technically should pass directly to
+// the PIA6821.  In practice, so far, I've only seen the first (SW_W_INIT)
+// used when PR#4 is invoked to initialize the mouse interface from DOS,
+// so for the moment I'll just catch that specifically.
+
 enum {
   ST_MOUSEENABLE = 1,
   ST_INTMOUSE    = 2,
@@ -26,6 +32,8 @@ Mouse::Mouse()
 {
   status = 0;
   interruptsTriggered = 0;
+  lastX = lastY = 0;
+  lastButton = false;
 }
 
 Mouse::~Mouse()
@@ -50,29 +58,43 @@ uint8_t Mouse::readSwitches(uint8_t s)
 {
   switch (s) {
   case SW_R_HOMEMOUSE:
-    printf("unimplemented SW_R_HOMEMOUSE\n");
+    g_mouse->setPosition( (g_ram.readByte(0x578) << 8) | g_ram.readByte(0x478),
-    /* physical mouse X = $578/$478; 
+			  (g_ram.readByte(0x5F8) << 8) | g_ram.readByte(0x4F8)
-     * physical mouse Y = $5f8/$4f8 */
+			  );
     break;
   case SW_R_POSMOUSE:
-    printf("unimplemented SW_R_POSMOUSE\n");
+    g_mouse->setPosition( (g_ram.readByte(0x578+4) << 8) | g_ram.readByte(0x478+4),
-    /* physical mouse X = $578+4/$478+4;
+			  (g_ram.readByte(0x5F8+4) << 8) | g_ram.readByte(0x4F8+4)
-     * physical mouse Y + $5F8+4/$4f8+4 */
+			  );
     break;
   case SW_R_CLEARMOUSE:
     g_ram.writeByte(0x578+4, 0);
     g_ram.writeByte(0x478+4, 0);
     g_ram.writeByte(0x5F8+4, 0);
     g_ram.writeByte(0x4F8+4, 0);
-    /* physical mouse X = Y = 0 */
+    g_mouse->setPosition(0,0);
     break;
   case SW_R_READMOUSE:
-    printf("unimplemented SW_R_READMOUSE\n");
+    {
-    // FIXME: read from physical mouse and write to:
+      uint16_t xpos, ypos;
-    g_ram.writeByte(0x578+4, 0); // high X
+      g_mouse->getPosition(&xpos, &ypos);
-    g_ram.writeByte(0x478+4, 0); // low X
+      if (lastX != xpos || lastY != ypos) {
-    g_ram.writeByte(0x5F8+4, 0); // high Y
+	interruptsTriggered |= 0x20; // "x or y changed since last reading"
-    g_ram.writeByte(0x4F8+4, 0); // low Y
+	lastX = xpos; lastY = ypos;
+      }
+      curButton = g_mouse->getButton();
+      uint8_t newStatus = g_ram.readByte(0x778+4) & ~0xC0;
+      if (curButton) { newStatus |= 0x80; };
+      if (lastButton) { newStatus |= 0x40; };
+
+      uint16_t xv = xpos >> 8; xv &= 0xFF;
+      printf("XPOS: %d => 0x%X 0x%X\n", xpos, xv, xpos & 0xFF);
+      
+      g_ram.writeByte(0x578+4, xv); // high X
+      g_ram.writeByte(0x478+4, xpos & 0xFF); // low X
+      g_ram.writeByte(0x5F8+4, (ypos >> 8) & 0xFF); // high Y
+      g_ram.writeByte(0x4F8+4, ypos); // low Y
+    }
     break;
   case SW_R_INITMOUSE:
     // Set clamp to (0,0) - (1023,1023)
@@ -80,11 +102,15 @@ uint8_t Mouse::readSwitches(uint8_t s)
     g_ram.writeByte(0x478, 0); // low of lowclamp
     g_ram.writeByte(0x5F8, 0x03); // high of highclamp
     g_ram.writeByte(0x4F8, 0xFF); // low of highclamp
-    printf("unimplemented SW_R_INITMOUSE\n");
+    g_mouse->setClamp(XCLAMP, 0, 1023);
-    /* physicalMouse->setClamp(XCLAMP, 0, 1023);
+    g_mouse->setClamp(YCLAMP, 0, 1023);
-     * physicalMouse->setClamp(YCLAMP, 0, 1023); */
     break;
   case SW_R_SERVEMOUSE:
+    if (lastButton) interruptsTriggered |= 0x40;
+    if (curButton != lastButton) {
+      interruptsTriggered |= 0x80;
+      lastButton = curButton;
+    }
     g_ram.writeByte(0x778+4, interruptsTriggered);
     g_ram.writeByte(0x6B8+4, interruptsTriggered); // hack to appease ROM
     interruptsTriggered = 0;
@@ -98,25 +124,30 @@ uint8_t Mouse::readSwitches(uint8_t s)
 void Mouse::writeSwitches(uint8_t s, uint8_t v)
 {
   switch (s) {
+  case SW_W_INIT:
+    v &= 0x03; // just the low 3 bits apparently?
+    printf("Simple init: value is 0x%X\n", v);
+    status = v;
+    g_ram.writeByte(0x7f8 + 4, v);
+    break;
   case SW_W_CLAMPMOUSE:
     {
       uint16_t lowval = (g_ram.readByte(0x578) << 8) | (g_ram.readByte(0x478));
       uint16_t highval = (g_ram.readByte(0x5F8) << 8) | (g_ram.readByte(0x4F8));
       if (v) {
-	// Y is clamping
+	g_mouse->setClamp(YCLAMP, lowval, highval);
-	/* physicalMouse->setClamp(YCLAMP, lowval, highval); */
       } else {
 	// X is clamping
-	/* physicalMouse->setClamp(XCLAMP, lowval, highval); */
+	g_mouse->setClamp(XCLAMP, lowval, highval);
       }
-      printf("unimplemented SW_W_CLAMPMOUSE [0x%X]\n", v);
     }
     break;
   case SW_W_SETMOUSE:
     status = v;
+    g_ram.writeByte(0x7f8 + 4, v);
     break;
   default:
-    printf("mouse: unknown switch write 0x%X\n", s);
+    printf("mouse: unknown switch write 0x%X = 0x%2X\n", s, v);
     break;
   }
 }
@@ -125,7 +156,7 @@ void Mouse::loadROM(uint8_t *toWhere)
 {
   /* Actual mouse ROM Disassembly:
 C400-   2C 58 FF    BIT   $FF58   ; test bits in FF58 w/ A
-C403-   70 1B       BVS   $C420   ; V will contain bit 6 from $FF58, which should be $20 on boot-up
+C403-   70 1B       BVS   $C420   ; V will contain bit 6 from $FF58, which should be $60 on boot-up (RTS), which has $40 set, so should branch here
 C405-   38          SEC
 C406-   90 18       BCC   $C420   ; no-op; unless called @ $C406 directly?
 
@@ -154,13 +185,12 @@ C41D-   AE
 C41E-   AE
 C41F-   AE
 
-; Main
+; Main (installs KSW for IN# handling)
 C420-   48          PHA  ; push accumulator to stack
 C421-   98          TYA
 C422-   48          PHA  ; push Y to stack
 C423-   8A          TXA  
 C424-   48          PHA  ; push X to stack
-C424-   48          PHA
 C425-   08          PHP  ; push status to stack
 C426-   78          SEI  ; disable interrupts
 
@@ -176,28 +206,30 @@ C426-   78          SEI  ; disable interrupts
 ;   TSX
 ;   LDA $100, X  ; grab the return address off the stack
 
-C427-   20 58 FF    JSR   $FF58
+C427-   20 58 FF    JSR   $FF58  ; call something that will RTS
-C42A-   BA          TSX
+C42A-   BA          TSX          ; pull stack pointer to X
-C42B-   BD 00 01    LDA   $0100,X
+C42B-   BD 00 01    LDA   $0100,X ; grab A from the current stack pointer, which has our return addr
-C42E-   AA          TAX
+C42E-   AA          TAX          ; X = return addr
 C42F-   0A          ASL
 C430-   0A          ASL
 C431-   0A          ASL
 C432-   0A          ASL
-C433-   A8          TAY
+C433-   A8          TAY          ; Y = (return addr) << 4
-C434-   28          PLP          ; restore status from stack
+C434-   28          PLP          ; restore status from stack (includes V,C)
-C435-   50 0F       BVC   $C446  ; overflow is clear if ... ?
+C435-   50 0F       BVC   $C446  ; overflow is clear from when we were called?
-C437-   A5 38       LDA   $38    ; >> what's in $38?
+C437-   A5 38       LDA   $38    ; >> $38 is the IN# vector ("KSW") low byte
 C439-   D0 0D       BNE   $C448  ; restore stack & return
 C43B-   8A          TXA
-C43C-   45 39       EOR   $39    ; >> what's in $39?
+C43C-   45 39       EOR   $39    ; >> KSW high byte
 C43E-   D0 08       BNE   $C448  ; restore stack & return
 C440-   A9 05       LDA   #$05
 C442-   85 38       STA   $38    ; ($38) = $05
-C442-   85 38       STA   $38
 C444-   D0 0B       BNE   $C451
 
+;; we wind up here when the entry vector $c405 is called directly (from $9eba)
 C446-   B0 09       BCS   $C451 ; carry set if ... ?
+
+;; entry point when called as PR# so BASIC/DOS can init the mouse
 C448-   68          PLA         ; pull X from stack
 C449-   AA          TAX
 C44A-   68          PLA         ; pull Y from stack, but
@@ -277,6 +309,7 @@ C4A7-   D0 F1       BNE   $C49A
 C4A9-   EA          NOP
 C4AA-   A9 07       LDA   #$07
 C4AC-   D0 EC       BNE   $C49A
+; "TimeData" to set freq before init to 50/60 Hz? Doesn't look like it...
 C4AE-   A2 03       LDX   #$03
 C4B0-   38          SEC
 C4B1-   60          RTS
@@ -314,8 +347,7 @@ Patch: C471 from 99 82 C0 60 => 8D CF C0 60
 
 SERVEMOUSE @ $C4B2:
         78 SEI
-  AD CE C0 LDA $C0CE   ; use soft switch 0xE (read) to trigger this - expect ne\
+  AD CE C0 LDA $C0CE   ; use soft switch 0xE (read) to trigger this - expect new value to be placed in $7f8+4 and $6b8+4
-w value to be placed in $7f8+4 and $6b8+4
      A2 04 LDX #$04    ; our slot number, for cleanup code
         18 CLC
      90 C1 BCC $C47C
@@ -324,7 +356,7 @@ Patch: C4B2 from 08 A5 00 48 A9 60 85 00 78 =>
                  78 AD CE C0 A2 04 18 90 C1
 
 READMOUSE
-C48E-  AD CB C0 LDA $C04B  ; soft switch 0x0B for readmouse
+C48E-  AD CB C0 LDA $C0CB  ; soft switch 0x0B for readmouse
              18 CLC
              60 RTS
 
@@ -332,14 +364,14 @@ Patch: from A9 04 99 83 C0 =>
             AD CB C0 18 60
 
 CLEARMOUSE
-C49F-  AD CA C0 LDA $C04A  ; soft switch 0x0A for clearmouse
+C49F-  AD CA C0 LDA $C0CA  ; soft switch 0x0A for clearmouse
              18 CLC
              60 RTS
 
 Patch: from EA A9 05 D0 F6 =>
             AD CA C0 18 60
 POSMOUSE
-C4a4-  AD C9 C0 LDA $C049  ; soft switch 0x09 for posmouse
+C4a4-  AD C9 C0 LDA $C0C9  ; soft switch 0x09 for posmouse
              18 CLC
              60 RTS
 
@@ -347,20 +379,20 @@ Patch: from EA A9 06 D0 F1 =>
             AD C9 C0 18 60
 
 CLAMPMOUSE
-C48A- 8D CD C0  STA $C04D ; use write to soft switch 0x0D to trigger clamp
+C48A- 8D CD C0  STA $C0CD ; use write to soft switch 0x0D to trigger clamp
             60  RTS
 
 Patch: from 99 83 C0 60 => 8D CD C0 60
 
 HOMEMOUSE
-C4A9- AD C8 C0 LDA $c048  ; soft switch 0x08 for homemouse (read)
+C4A9- AD C8 C0 LDA $c0C8  ; soft switch 0x08 for homemouse (read)
             18      CLC
             60       RTS
 
 Patch: from EA A9 07 D0 EC => AD C8 C0 18 60
 
 INITMOUSE
-C498- AD CC C0 LDA $C04C ; soft switch 0x0C read for initmouse
+C498- AD CC C0 LDA $C0CC ; soft switch 0x0C read for initmouse
             18 CLC
             60 RTS
 
@@ -376,8 +408,8 @@ Patch: from A9 02 99 83 C0 => AD CC C0 18 60
 		       0x0A, 0x0A, 0x0A, 0xA8, 0x28, 0x50, 0x0F, 0xA5,  // C430
 		       0x38, 0xd0, 0x0d, 0x8a, 0x45, 0x39, 0xd0, 0x08,
 		       0xa9, 0x05, 0x85, 0x38, 0xd0, 0x0b, 0xb0, 0x09,  // C440
-		       0x68, 0xaa, 0x68, 0xea, 0x68, 0x99, 0x80, 0xc0,
+		       0x68, 0xaa, 0x68, 0xea, 0x68, 0xea, 0xea, 0xea,
-		       0x60, 0x99, 0x81, 0xc0, 0x68, 0xbd, 0x38, 0x06,  // C450
+                       0x60, 0x99, 0x81, 0xc0, 0x68, 0xbd, 0x38, 0x06,  // C450
 		       0xaa, 0x68, 0xa8, 0x68, 0xbd, 0x00, 0x02, 0x60,
 		       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // C460
 		       0x00, 0x00, 0x00, 0x00, 0x00, 0xc9, 0x10, 0xb0,
@@ -426,13 +458,25 @@ void Mouse::maintainMouse(int64_t cycleCount)
   static int64_t nextInterruptTime = cycleCount + 17050;
 
   if ( (status & ST_MOUSEENABLE) &&
-       (status & ST_INTVBL) ) {
+       (status & ST_INTVBL)  &&
-    if (cycleCount >= nextInterruptTime) {
+       (cycleCount >= nextInterruptTime) ) {
+    g_cpu->irq();
+    
+    interruptsTriggered |= ST_INTVBL;
+    
+    nextInterruptTime += 17050;
+  } else {
+    uint16_t xpos, ypos;
+    g_mouse->getPosition(&xpos, &ypos);
+
+    if ( (status & ST_MOUSEENABLE) &&
+	 (status & ST_INTMOUSE) &&
+	 (xpos != lastX || ypos != lastY) ) {
       g_cpu->irq();
       
-      interruptsTriggered |= ST_INTVBL;
+      interruptsTriggered |= ST_INTMOUSE;
-      
+      lastX = xpos; lastY = ypos;
-      nextInterruptTime += 17050;
     }
   }
+  /* FIXME: still need button */
 }

apple/mouse.h

@@ -32,6 +32,10 @@ class Mouse : public Slot {
 private:
   uint8_t status;
   uint8_t interruptsTriggered;
+
+  uint16_t lastX, lastY;
+  bool lastButton;
+  bool curButton;
 };
 
 #endif

globals.cpp

@@ -5,6 +5,7 @@ Cpu *g_cpu = NULL;
 VM *g_vm = NULL;
 PhysicalDisplay *g_display = NULL;
 PhysicalKeyboard *g_keyboard = NULL;
+PhysicalMouse *g_mouse = NULL;
 PhysicalSpeaker *g_speaker = NULL;
 PhysicalPaddles *g_paddles = NULL;
 PhysicalPrinter *g_printer = NULL;

globals.h

@@ -8,6 +8,7 @@
 #include "vm.h"
 #include "physicaldisplay.h"
 #include "physicalkeyboard.h"
+#include "physicalmouse.h"
 #include "physicalspeaker.h"
 #include "physicalpaddles.h"
 #include "physicalprinter.h"
@@ -41,6 +42,7 @@ extern Cpu *g_cpu;
 extern VM *g_vm;
 extern PhysicalDisplay *g_display;
 extern PhysicalKeyboard *g_keyboard;
+extern PhysicalMouse *g_mouse;
 extern PhysicalSpeaker *g_speaker;
 extern PhysicalPaddles *g_paddles;
 extern PhysicalPrinter *g_printer;

nix/debugger.cpp

@@ -51,6 +51,9 @@ Debugger::Debugger()
   server.sin_addr.s_addr = INADDR_ANY;
   server.sin_port = htons(12345);
 
+  steppingOut = false;
+  singleStep = false;
+
   if (bind(sd, (struct sockaddr *) &server, sizeof(server)) < 0) {
     perror("error binding to debug socket");
     exit(1);
@@ -71,10 +74,14 @@ Debugger::~Debugger()
 bool getAddress(const char *buf, unsigned int *addrOut)
 {
   unsigned int val;
-  if (sscanf(buf, " 0x%X", &val) == 1) {
+  if (sscanf(buf, " 0x%X", &val) == 1 ||
+      sscanf(buf, " 0x%x", &val) == 1
+      ) {
     *addrOut = val;
     return true;
-  } else if (sscanf(buf, " $%X", &val) == 1) {
+  } else if (sscanf(buf, " $%X", &val) == 1 ||
+	     sscanf(buf, " $%x", &val) == 1
+	     ) {
     *addrOut = val;
     return true;
   } else if (sscanf(buf, " %d", &val) == 1) {
@@ -91,11 +98,10 @@ bool getAddress(const char *buf, unsigned int *addrOut)
 #define HEXCHAR(x) ((x>='0'&&x<='9')?x-'0':(x>='a'&&x<='f')?x-'a'+10:(x>='A'&&x<='F')?x-'A'+10:(x=='i' || x=='I')?1:(x=='o' || x=='O')?0:0)
 #define FROMHEXP(p) ((HEXCHAR(*p) << 4) | HEXCHAR(*(p+1)))
 
-bool steppingOut = false;
-
 void Debugger::step()
 {
   static char buf[256];
+  uint8_t cmdbuf[50];
 
   // FIXME: add more than just RTS(0x60) here
   if (steppingOut &&
@@ -124,39 +130,55 @@ void Debugger::step()
       return;
     }
 
-    uint8_t cmdbuf[50];
+    if (!singleStep && breakpoint && g_cpu->pc != breakpoint) {
-
-    uint16_t loc=g_cpu->pc;
-    for (int i=0; i<50/3; i++) {
-      for (int idx=0; idx<sizeof(cmdbuf); idx++) {
-	cmdbuf[idx] = g_vm->getMMU()->read(loc+idx);
-      }
-      loc += dis.instructionToMnemonic(loc, cmdbuf, buf, sizeof(buf));
-      write(cd, buf, strlen(buf));
-      buf[0] = 13;
-      buf[1] = 10;
-      write(cd, buf, 2);
-    }
-
-
-    if (breakpoint && g_cpu->pc != breakpoint) {
       // Running until we reach the breakpoint
       return;
     }
+    singleStep = false; // we have taken a single step, so reset flag
 
     uint8_t b; // byte value used in parsing
     unsigned int val; // common value buffer used in parsing
     
-    GETCH;
+    // debugging what's at FF58 right now
-    snprintf(buf, sizeof(buf), "Got char %d\012\015", b);
+    uint8_t tmp = g_vm->getMMU()->read(0xff58);
+    sprintf(buf, " 0xFF58: 0x%.2X\r\n", tmp);
     write(cd, buf, strlen(buf));
 
+  doover:
+    do {
+      GETCH;
+    } while (b != 'c' && // continue (with breakpoint set)
+	     b != 'q' && // quit
+	     b != 's' && // single step
+	     b != 'S' && // step out
+	     b != 'b' && // set breakpoint
+	     b != 'd' && // show disassembly
+	     b != 'L' && // load memory (lines)
+	     b != '*'    // show memory (byte)
+	     );
+
     switch (b) {
-    case 'c': // Continue - close connection and let execution flow
+    case 'c': // continue (if there is a breakpoint set)
+      if (breakpoint) {
+	snprintf(buf, sizeof(buf), "Continuing until breakpoint 0x%X\012\015", breakpoint);
+	write(cd, buf, strlen(buf));
+      } else {
+	snprintf(buf, sizeof(buf), "No breakpoint to continue until\012\015");
+	write(cd, buf, strlen(buf));
+	goto doover;
+      }
+      break;
+      
+    case 'q': // Close debugging socket and quit
       printf("Closing debugging socket\n");
+      breakpoint = 0;
       close(cd); cd=-1;
       break;
 
+    case 's':
+      singleStep = true; // for when breakpoint is set: just step once
+      break;
+      
     case 'S':
       steppingOut = true;
       break;
@@ -176,6 +198,23 @@ void Debugger::step()
       write(cd, buf, strlen(buf));
       break;
 
+    case 'd': // show disassembly @ PC
+      { 
+	uint16_t loc=g_cpu->pc;
+	for (int i=0; i<50/3; i++) {
+	  for (int idx=0; idx<sizeof(cmdbuf); idx++) {
+	    cmdbuf[idx] = g_vm->getMMU()->read(loc+idx);
+	  }
+	  loc += dis.instructionToMnemonic(loc, cmdbuf, buf, sizeof(buf));
+	  write(cd, buf, strlen(buf));
+	  buf[0] = 13;
+	  buf[1] = 10;
+	  write(cd, buf, 2);
+	}
+      }
+      goto doover;
+      break;
+      
     case 'L': // Load data to memory. Use: "L 0x<address>\n" followed by lines of packed hex; ends with a blank line
       {
 	printf("Loading data\n");
@@ -198,6 +237,7 @@ void Debugger::step()
 	  }
 	}
       }
+      goto doover;
       break;
 
     case '*': // read 1 byte of memory. Use '* 0x<address>'
@@ -214,6 +254,7 @@ void Debugger::step()
 	  write(cd, buf, strlen(buf));
 	}
       }
+      goto doover;
       break;
 
     case 'G': // Goto (set PC)

nix/debugger.h

@@ -19,6 +19,8 @@ class Debugger {
   pthread_t listenThreadID;
 
   uint32_t breakpoint;
+  bool steppingOut;
+  bool singleStep;
 };
 
 

physicalmouse.h

@@ -2,13 +2,27 @@
 #define __PHYSICALMOUSE_H
 
 #include <stdint.h>
+#include <stdio.h>
+
+enum {
+  XCLAMP = 0,
+  YCLAMP = 1
+};
 
 class PhysicalMouse {
  public:
-  PhysicalMouse() {}
+  PhysicalMouse() { lowClamp[XCLAMP] = lowClamp[YCLAMP] = 0; highClamp[XCLAMP] = highClamp[YCLAMP] = 1023; }
   virtual ~PhysicalMouse() {};
 
   virtual void maintainMouse() = 0;
+
+  virtual void setClamp(uint8_t direction, uint16_t low, uint16_t high) { lowClamp[direction] = low; highClamp[direction] = high; printf("clamp %d %d-%d\n", direction, low, high); }
+  virtual void setPosition(uint16_t x, uint16_t y) = 0;
+  virtual void getPosition(uint16_t *x, uint16_t *y) = 0;
+  virtual bool getButton() = 0;
+
+protected:
+  uint16_t lowClamp[2], highClamp[2];
 };
 
 #endif

sdl/aiie.cpp

@@ -7,6 +7,7 @@
 #include "applevm.h"
 #include "sdl-display.h"
 #include "sdl-keyboard.h"
+#include "sdl-mouse.h"
 #include "sdl-speaker.h"
 #include "sdl-paddles.h"
 #include "nix-filemanager.h"
@@ -291,7 +292,7 @@ struct timespec runMaintenance(struct timespec now)
     initialized = true;
   }
 
-  timespec_add_us(&startTime, 100000*cycleCount, &nextRuntime); // FIXME: what's a good time here? 1/10 sec?
+  timespec_add_us(&startTime, 16667*cycleCount, &nextRuntime); // FIXME: what's a good time here? 60 Hz?
 
   // Check if it's time to run - and if not, return how long it will
   // be until we need to run
@@ -305,6 +306,7 @@ struct timespec runMaintenance(struct timespec now)
   if (!g_biosInterrupt) {
     // If the BIOS is running, then let it handle the keyboard directly
     g_keyboard->maintainKeyboard();
+    g_mouse->maintainMouse();
   }
 
   doDebugging();
@@ -389,6 +391,7 @@ int main(int argc, char *argv[])
   g_vm = new AppleVM();
 
   g_keyboard = new SDLKeyboard(g_vm->getKeyboard());
+  g_mouse = new SDLMouse();
 
   // Now that the VM exists and it has created an MMU, we tell the CPU how to access memory through the MMU.
   g_cpu->SetMMU(g_vm->getMMU());

sdl/sdl-keyboard.cpp

@@ -1,6 +1,7 @@
 #include "sdl-keyboard.h"
 
 #include "sdl-paddles.h"
+#include "sdl-mouse.h"
 #include "globals.h"
 
 SDLKeyboard::SDLKeyboard(VMKeyboard *k) : PhysicalKeyboard(k)
@@ -149,12 +150,18 @@ void SDLKeyboard::maintainKeyboard()
       if (event.key.repeat == 0)
 	handleKeypress(&event.key);
       break;
+    case SDL_MOUSEBUTTONDOWN:
+    case SDL_MOUSEBUTTONUP:
+      ((SDLMouse *)g_mouse)->mouseButtonEvent(event.type == SDL_MOUSEBUTTONDOWN);
+      break;
     case SDL_MOUSEMOTION:
       // We are handling the SDL input loop, so need to pass this off to the paddles. :/
       // FIXME: nasty rooting around in other objects and typecasting.
       // FIXME: event.motion.state & SDL_BUTTON_LMASK, et al?
 
       ((SDLPaddles *)g_paddles)->gotMouseMovement(event.motion.x, event.motion.y);
+      ((SDLMouse *)g_mouse)->gotMouseEvent(event.motion.state, // button
+					   event.motion.xrel, event.motion.yrel);
       break;
 
     case SDL_QUIT: