- Added support for reading, and writing outside the

  emulator's memory.

  All reads outside of the emulator's memory give back
  $/0xFF bytes, while all writes outside of the
  emulator's memory are ignored.

- Implemented malloc(), and free() in the SuB Suite.

  In order to do this, I had to add support for a heap,
  which I did by reserving the first 3 banks of the
  address space (the first 192K), and by adding a
  routine that finds the end of the RAM.

  In this case, I set the starting address for the
  routine at bank 3 (bank 4 with one indexing), but,
  the routine's starting address isn't hardcoded, and
  thus, any starting address can be passed as an
  argument.

  The routine uses the fact that we can now read/write
  outside the emulator's memory, and also uses the
  fact that writing outside the emulator's memory will
  be ignored, and that reading outside the emulator's
  memory will always read $/0xFF bytes, and uses that
  to signal that it's reached the end of the RAM.

- Added a test program for getting the size of RAM
  starting at address $/0x20000.

1 files changed, 9 insertions, 6 deletions

diff --git a/disasm.c b/disasm.c
index 3fd0c11..da468dd 100644
--- a/disasm.c
+++ b/disasm.c
@@ -107,14 +107,15 @@ void disasm(struct sux *cpu, uint8_t lines, uint8_t opcode, uint8_t prefix, uint
 	if (subdbg) {
 		uint8_t ln = 33;
 		uint16_t line_idx = 0;
-		uint32_t tmpad = 0x31000;
+		uint32_t tmpad = 0x20237;
 		int row, col;
 		uint8_t iscursor = 0;
 		union reg ptr;
 		ptr.u64 = 0;
 		uint32_t adr;
 		if (address == CTRL_ADDR || addr[STEP_ADDR]) {
-			adr = 0x30000;
+			adr = read_value(cpu, 0, tmpad, 7, 0, 0);
+			tmpad += 8;
 			wprintw(scr, ", scr_row: %02u, scr_col: %02u, scr_str: %02u, scr_end: %02u", addr[0], addr[1], addr[2], addr[3]);
 			wmove(scr, 32, 0);
 			wprintw(scr, "bitabl: ");
@@ -125,10 +126,11 @@ void disasm(struct sux *cpu, uint8_t lines, uint8_t opcode, uint8_t prefix, uint
 			wmove(scr, ln++, 0);
 			uint8_t maxrow = 10;
 			int line_offset = (addr[0]-(maxrow-1) >= 0) ? addr[0]-(maxrow-1) : 0;
+			adr = read_value(cpu, 0, tmpad, 7, 0, 0);
 			for (uint8_t i = 0; i < maxrow; i++) {
 				line_idx = (i+addr[2]+line_offset << 6) + (i+addr[2]+line_offset << 4);
 				for (uint8_t j = 0; j < 0x50; j++) {
-					wprintw(scr, "%02X", addr[tmpad+j+line_idx]);
+					wprintw(scr, "%02X", addr[adr+j+line_idx]);
 						if ((addr[0] == i+line_offset) && addr[1] == j) {
 							iscursor=1;
 							getyx(scr,row, col);
@@ -183,7 +185,7 @@ void disasm(struct sux *cpu, uint8_t lines, uint8_t opcode, uint8_t prefix, uint
 
 		wmove(scr, 31, 0);
 		wclrtoeol(scr);
-		adr = 0x204CA;
+		adr = 0x200CA;
 		ptr.u64 = read_value(cpu, 0, adr, 3, 0, 0);
 		wprintw(scr, "t_id: $%02X", ptr.u8[0]);
 		wprintw(scr, ", t_type: $%02X", ptr.u8[1]);
@@ -209,7 +211,8 @@ void disasm(struct sux *cpu, uint8_t lines, uint8_t opcode, uint8_t prefix, uint
 		wprintw(scr, " d: $%02X,", addr[0x0D]);
 		wprintw(scr, " e: $%02X,", addr[0x0E]);
 		wprintw(scr, " f: $%02X",  addr[0x0F]);
-		tmpad = 0x33000;
+		tmpad += 8;
+		adr = read_value(cpu, 0, tmpad, 7, 0, 0);
 		line_idx = 0;
 		wprintw(scr, "cmd_buf:");
 		for (uint8_t i = 0; i < 1; i++) {
@@ -217,7 +220,7 @@ void disasm(struct sux *cpu, uint8_t lines, uint8_t opcode, uint8_t prefix, uint
 			wclrtoeol(scr);
 			line_idx = (i << 4)+(i << 6);
 			for (uint8_t j = 0; j < 0x50; j++) {
-				wprintw(scr, "%02X", addr[tmpad+j+line_idx]);
+				wprintw(scr, "%02X", addr[adr+j+line_idx]);
 			}
 			wprintw(scr, ", i: %02X", i);
 		}*/