Mercurial > repos > blastem

changeset 279:6be6056735a9

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fix native address lookup in bannked memory area
author Mike Pavone <pavone@retrodev.com>
date Fri, 03 May 2013 20:18:28 -0700
parents 9578e5dea147
children 9ee64039ddeb
files blastem.c z80_to_x86.c zruntime.S
diffstat 3 files changed, 17 insertions(+), 4 deletions(-) [+]
line wrap: on
line diff
--- a/blastem.c	Fri May 03 20:15:23 2013 -0700
+++ b/blastem.c	Fri May 03 20:18:28 2013 -0700
@@ -133,7 +133,7 @@
 uint8_t busack = 0;
 uint32_t busack_cycle = CYCLE_NEVER;
 uint8_t new_busack = 0;
-//#define DO_DEBUG_PRINT
+#define DO_DEBUG_PRINT
 #ifdef DO_DEBUG_PRINT
 #define dprintf printf
 #define dputs puts
@@ -350,6 +350,8 @@
 	}*/
 }
 
+uint32_t zram_counter = 0;
+
 m68k_context * io_write(uint32_t location, m68k_context * context, uint8_t value)
 {
 	if (location < 0x10000) {
@@ -401,6 +403,11 @@
 				} else {
 					if (busreq) {
 						dputs("releasing z80 bus");
+						char fname[20];
+						sprintf(fname, "zram-%d", zram_counter++);
+						FILE * f = fopen(fname, "wb");
+						fwrite(z80_ram, 1, sizeof(z80_ram), f);
+						fclose(f);
 						z80_context * z_context = context->next_cpu;
 						//TODO: Add necessary delay between release of busreq and resumption of execution
 						z_context->current_cycle = (context->current_cycle * MCLKS_PER_68K) / MCLKS_PER_Z80;
@@ -485,6 +492,11 @@
 				} else {
 					if (busreq) {
 						dprintf("releasing Z80 bus @ %d\n", (context->current_cycle * MCLKS_PER_68K) / MCLKS_PER_Z80);
+						char fname[20];
+						sprintf(fname, "zram-%d", zram_counter++);
+						FILE * f = fopen(fname, "wb");
+						fwrite(z80_ram, 1, sizeof(z80_ram), f);
+						fclose(f);
 						z80_context * z_context = context->next_cpu;
 						//TODO: Add necessary delay between release of busreq and resumption of execution
 						z_context->current_cycle = (context->current_cycle * MCLKS_PER_68K) / MCLKS_PER_Z80;
--- a/z80_to_x86.c	Fri May 03 20:15:23 2013 -0700
+++ b/z80_to_x86.c	Fri May 03 20:18:28 2013 -0700
@@ -1421,7 +1421,7 @@
 		map = context->static_code_map;
 	} else if (address >= 0x8000) {
 		address &= 0x7FFF;
-		map = context->banked_code_map + (context->bank_reg << 15);
+		map = context->banked_code_map + context->bank_reg;
 	} else {
 		dprintf("z80_get_native_address: %X NULL\n", address);
 		return NULL;
@@ -1455,7 +1455,7 @@
 		context->ram_code_flags[((address + size) & 0x1C00) >> 10] |= 1 << (((address + size) & 0x380) >> 7);
 	} else if (address >= 0x8000) {
 		address &= 0x7FFF;
-		map = context->banked_code_map + (context->bank_reg << 15);
+		map = context->banked_code_map + context->bank_reg;
 		if (!map->offsets) {
 			map->offsets = malloc(sizeof(int32_t) * 0x8000);
 			memset(map->offsets, 0xFF, sizeof(int32_t) * 0x8000);
@@ -1474,7 +1474,7 @@
 			map = context->static_code_map;
 		} else if (address >= 0x8000) {
 			address &= 0x7FFF;
-			map = context->banked_code_map + (context->bank_reg << 15);
+			map = context->banked_code_map + context->bank_reg;
 		} else {
 			return;
 		}
--- a/zruntime.S	Fri May 03 20:15:23 2013 -0700
+++ b/zruntime.S	Fri May 03 20:18:28 2013 -0700
@@ -68,6 +68,7 @@
 	cmp $0x8000, %r13w
 	jae z80_read_bank
 	/* TODO: Bank reg, YM-2612, PSG/VDP */
+	mov $FF, $r13b
 	ret
 z80_read_ram:
 	and $0x1FFF, %r13