int fast_base_configured;
unsigned int fast_base;
-#define FAST_SIZE (256 * 1024 * 1024)
+#define FAST_SIZE (8 * 1024 * 1024)
#define GAYLEBASE 0xD80000
#define GAYLESIZE (448 * 1024)
#define KICKBASE 0xF80000
#define KICKSIZE (512 * 1024)
+#define AC_BASE 0xE80000
+#define AC_SIZE (64 * 1024)
+
+#define AC_PIC_COUNT 1
+int ac_current_pic = 0;
+int ac_done = 0;
+
int mem_fd;
int mem_fd_gpclk;
int gayle_emulation_enabled = 1;
return level;
}
+static unsigned char ac_fast_ram_rom[] = {
+ 0xe, 0x0, // 00/02, link into memory free list, 8 MB
+ 0x6, 0x9, // 04/06, product id
+ 0x8, 0x0, // 08/0a, preference to 8 MB space
+ 0x0, 0x0, // 0c/0e, reserved
+ 0x0, 0x7, 0xd, 0xb, // 10/12/14/16, mfg id
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x4, 0x2, 0x0 // 18/.../26, serial
+};
+
+static unsigned int ac_fast_ram_read_memory_8(unsigned int address) {
+ unsigned char val = 0;
+ if ((address & 1) == 0 && (address / 2) < sizeof(ac_fast_ram_rom))
+ val = ac_fast_ram_rom[address / 2];
+ val <<= 4;
+ if (address != 0 && address != 2 && address != 40 && address != 42)
+ val ^= 0xf0;
+ return (unsigned int)val;
+}
+
+static void ac_fast_ram_write_memory_8(unsigned int address, unsigned int value) {
+ int done = 0;
+
+ if (address == 0x4a) { // base[19:16]
+ fast_base = (value & 0xf0) << (16 - 4);
+ } else if (address == 0x48) { // base[23:20]
+ fast_base &= 0xff0fffff;
+ fast_base |= (value & 0xf0) << (20 - 4);
+ fast_base_configured = 1;
+ done = 1;
+ } else if (address == 0x4c) { // shut up
+ done = 1;
+ }
+
+ if (done) {
+ ac_current_pic++;
+ if (ac_current_pic == AC_PIC_COUNT)
+ ac_done = 1;
+ }
+}
+
+static unsigned int autoconfig_read_memory_8(unsigned int address) {
+ if (ac_current_pic == 0) {
+ return ac_fast_ram_read_memory_8(address);
+ }
+}
+
+static void autoconfig_write_memory_8(unsigned int address, unsigned int value) {
+ if (ac_current_pic == 0) {
+ return ac_fast_ram_write_memory_8(address, value);
+ }
+}
+
unsigned int m68k_read_memory_8(unsigned int address) {
if (fast_base_configured && address >= fast_base && address < fast_base + FAST_SIZE) {
return fast_ram_array[address - fast_base];
}
+ if (!ac_done && address >= AC_BASE && address < AC_BASE + AC_SIZE) {
+ return autoconfig_read_memory_8(address - AC_BASE);
+ }
+
if (maprom == 1) {
if (address >= KICKBASE && address < KICKBASE + KICKSIZE) {
return g_kick[address - KICKBASE];
return;
}
+ if (!ac_done && address >= AC_BASE && address < AC_BASE + AC_SIZE) {
+ return autoconfig_write_memory_8(address - AC_BASE, value);
+ }
+
if (gayle_emulation_enabled) {
if (address >= GAYLEBASE && address < GAYLEBASE + GAYLESIZE) {
writeGayleB(address, value);