From 5b10b2de05a770c4a2d6430e437f7eef6293ebce Mon Sep 17 00:00:00 2001
From: jespergravgaard <jesper@balmangravgaard.dk>
Date: Sun, 7 Mar 2021 10:27:22 +0100
Subject: [PATCH] Work in progress on MEGA65 DevKit support.

---
 .gitignore                                    |  3 +-
 src/main/kc/target/mega65_c64_remote.tgt      | 13 ++++
 src/main/kc/target/mega65_remote.tgt          | 12 ++++
 src/test/kc/examples/mega65/dypp65.c          | 12 ++--
 src/test/kc/examples/mega65/test-fullcolour.c | 72 +++++++++++++++++++
 5 files changed, 104 insertions(+), 8 deletions(-)
 create mode 100644 src/main/kc/target/mega65_c64_remote.tgt
 create mode 100644 src/main/kc/target/mega65_remote.tgt
 create mode 100644 src/test/kc/examples/mega65/test-fullcolour.c

diff --git a/.gitignore b/.gitignore
index 582aefa19..3665c34eb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,9 +5,8 @@
 */*.sym
 */.tmpdirs
 */bin/
+/target/
 */workspace.xml
-./target/
-target/
 **/.DS_Store
 .project
 .tmpdirs
diff --git a/src/main/kc/target/mega65_c64_remote.tgt b/src/main/kc/target/mega65_c64_remote.tgt
new file mode 100644
index 000000000..3d6e2f4b0
--- /dev/null
+++ b/src/main/kc/target/mega65_c64_remote.tgt
@@ -0,0 +1,13 @@
+{
+    "description": "MEGA65 platform executable starting in C64 mode.",
+    "extension": "prg",
+    "link": "mega65_c64.ld",
+    "start_address": "0x080d",
+    "cpu": "MEGA45GS02",
+    "interrupt": "rom_min_c64",
+    "emulator": "m65 -l /dev/cu.usbserial-251633005A061 -F -r -4",
+    "defines": {
+        "__MEGA65__": 1,
+        "__MEGA65_C64__": 1
+    }
+}
\ No newline at end of file
diff --git a/src/main/kc/target/mega65_remote.tgt b/src/main/kc/target/mega65_remote.tgt
new file mode 100644
index 000000000..4f5dabb91
--- /dev/null
+++ b/src/main/kc/target/mega65_remote.tgt
@@ -0,0 +1,12 @@
+{
+    "description": "MEGA65 platform PRG executable starting in MEGA65 mode.",
+    "extension": "prg",
+    "link": "mega65.ld",
+    "start_address": "0x2017",
+    "cpu": "MEGA45GS02",
+    "interrupt": "rom_min_mega65",
+    "emulator": "m65 -l /dev/cu.usbserial-251633005A061 -F -r",
+    "defines": {
+        "__MEGA65__": 1
+    }
+}
\ No newline at end of file
diff --git a/src/test/kc/examples/mega65/dypp65.c b/src/test/kc/examples/mega65/dypp65.c
index f753ae61a..4085824e9 100644
--- a/src/test/kc/examples/mega65/dypp65.c
+++ b/src/test/kc/examples/mega65/dypp65.c
@@ -25,6 +25,12 @@ void main() {
     SEI();
     // Map memory to BANK 0 : 0x00XXXX - giving access to I/O
     memoryRemap(0,0,0);
+    // Enable 48MHz fast mode
+    VICIV->CONTROLB |= 0x40;
+    VICIV->CONTROLC |= 0x40;
+    // Enable the VIC 4
+    VICIV->KEY = 0x47;
+    VICIV->KEY = 0x53;
     // Set sideborder width=0, disable raster delay and hot registers
     VICIV->SIDBDRWD_LO = 0;
     VICIV->SIDBDRWD_HI = 0;   
@@ -33,12 +39,6 @@ void main() {
     VICIV->TBDRPOS_HI = 0;
     VICIV->BBDRPOS_LO = 0;
     VICIV->BBDRPOS_HI = 2;
-    // Enable 48MHz fast mode
-    VICIV->CONTROLB |= 0x40;
-    VICIV->CONTROLC |= 0x40;
-    // Enable the VIC 4
-    VICIV->KEY = 0x47;
-    VICIV->KEY = 0x53;
     // Enable Super Extended Attribute Mode
     VICIV->CONTROLC |= 1;
     // Mode 40x25 chars - will be 45*25 when utilizing the borders
diff --git a/src/test/kc/examples/mega65/test-fullcolour.c b/src/test/kc/examples/mega65/test-fullcolour.c
new file mode 100644
index 000000000..39261db53
--- /dev/null
+++ b/src/test/kc/examples/mega65/test-fullcolour.c
@@ -0,0 +1,72 @@
+// Test Full-Colour Graphics
+
+#pragma target(mega65_remote)
+#include <mega65.h>
+#include <mega65-dma.h>
+#include <6502.h>
+#include <string.h>
+
+// The screen address (40*25=0x03e8 bytes)
+char * const SCREEN = 0x0400;
+// The charset address (45*32*8=0x2d00 bytes)
+char * const CHARSET = 0x2000;
+
+void main() {
+    // Avoid interrupts
+    SEI();
+    // Map memory to BANK 0 : 0x00XXXX - giving access to I/O
+    memoryRemap(0,0,0);
+    // Enable 48MHz fast mode
+    VICIV->CONTROLB |= 0x40;
+    VICIV->CONTROLC |= 0x40;
+    // Enable the VIC 4
+    VICIV->KEY = 0x47;
+    VICIV->KEY = 0x53;
+    // Enable Full-Colour Mode
+    VICIV->CONTROLC |= 2;
+    // Mode 40x25 chars 
+    VICIV->CONTROLB &= 0x7f;
+    VICIV->CHARSTEP_LO = 40;
+    VICIV->CHARSTEP_HI = 0;
+    // Set number of characters to display per row
+    VICIV->CHRCOUNT = 40;
+    // Set exact screen address
+    VICIV->SCRNPTR_LOLO = <SCREEN;
+    VICIV->SCRNPTR_LOHI = >SCREEN;
+    VICIV->SCRNPTR_HILO = 0;
+    VICIV->SCRNPTR_HIHI = 0;
+    // Set exact charset address
+    //VICIV->CHARPTR_LOLO = <CHARSET;
+    //VICIV->CHARPTR_LOHI = >CHARSET;
+    //VICIV->CHARPTR_HILO = 0;
+    // Backgound color black
+    VICIV->BG_COLOR = BLACK;
+
+    // Put some colours into the palettes
+    char c=0; do {
+        PALETTE_RED[c] = c & 0x0f;
+        PALETTE_GREEN[c] = 0x00;
+        PALETTE_BLUE[c] = c / 0x10;
+
+    } while (++c);
+
+    // Fill the screen with 0x80 (char at 64*0x80 = 0x2000)
+    memset_dma(SCREEN, 0x80, 40*25);
+    // Fill the colours with WHITE - directly into $ff80000
+    memset_dma256(0xff,0x08,0x0000, WHITE, 40*25);
+    // Fill the charset with 0x55
+    //memset_dma(CHARSET, 0x55, 256*64);
+
+    for(char i=0, c=0;i<64;i++) {        
+        CHARSET[i] = i;
+        //CHARSET[i] = c?0:i;
+        //c ^= 1;
+        //if((i&7)==7) c ^= 1;
+    }
+
+
+    // Loop forever
+    for(;;) {        
+        VICIV->BORDER_COLOR = VICII->RASTER;
+    }
+}
\ No newline at end of file