uint32_t load_rom(uint8_t* filename, uint32_t base_addr, uint8_t flags) {
UINT bytes_read;
DWORD filesize;
UINT count=0;
tick_t ticksstart, ticks_total=0;
ticksstart=getticks();
printf("%s\n", filename);
file_open(filename, FA_READ);
if(file_res) {
uart_putc('?');
uart_putc(0x30+file_res);
return 0;
}
filesize = file_handle.fsize;
smc_id(&romprops);
file_close();
/* reconfigure FPGA if necessary */
if(romprops.fpga_conf) {
printf("reconfigure FPGA with %s...\n", romprops.fpga_conf);
fpga_pgm((uint8_t*)romprops.fpga_conf);
}
set_mcu_addr(base_addr + romprops.load_address);
file_open(filename, FA_READ);
ff_sd_offload=1;
sd_offload_tgt=0;
f_lseek(&file_handle, romprops.offset);
for(;;) {
ff_sd_offload=1;
sd_offload_tgt=0;
bytes_read = file_read();
if (file_res || !bytes_read) break;
if(!(count++ % 512)) {
uart_putc('.');
}
}
file_close();
set_mapper(romprops.mapper_id);
printf("rom header map: %02x; mapper id: %d\n", romprops.header.map, romprops.mapper_id);
ticks_total=getticks()-ticksstart;
printf("%u ticks total\n", ticks_total);
if(romprops.mapper_id==3) {
printf("BSX Flash cart image\n");
printf("attempting to load BSX BIOS /sd2snes/bsxbios.bin...\n");
load_sram_offload((uint8_t*)"/sd2snes/bsxbios.bin", 0x800000);
printf("attempting to load BS data file /sd2snes/bsxpage.bin...\n");
load_sram_offload((uint8_t*)"/sd2snes/bsxpage.bin", 0x900000);
printf("Type: %02x\n", romprops.header.destcode);
set_bsx_regs(0xc0, 0x3f);
uint16_t rombase;
if(romprops.header.ramsize & 1) {
rombase = romprops.load_address + 0xff00;
// set_bsx_regs(0x36, 0xc9);
} else {
rombase = romprops.load_address + 0x7f00;
// set_bsx_regs(0x34, 0xcb);
}
sram_writebyte(0x33, rombase+0xda);
sram_writebyte(0x00, rombase+0xd4);
sram_writebyte(0xfc, rombase+0xd5);
set_fpga_time(0x0220110301180530LL);
}
if(romprops.has_dspx || romprops.has_cx4) {
printf("DSPx game. Loading firmware image %s...\n", romprops.dsp_fw);
load_dspx(romprops.dsp_fw, romprops.fpga_features);
/* fallback to DSP1B firmware if DSP1.bin is not present */
if(file_res && romprops.dsp_fw == DSPFW_1) {
load_dspx(DSPFW_1B, romprops.fpga_features);
}
if(file_res) {
snes_menu_errmsg(MENU_ERR_NODSP, (void*)romprops.dsp_fw);
}
}
uint32_t rammask;
uint32_t rommask;
while(filesize > (romprops.romsize_bytes + romprops.offset)) {
romprops.romsize_bytes <<= 1;
}
if(romprops.header.ramsize == 0) {
rammask = 0;
} else {
rammask = romprops.ramsize_bytes - 1;
}
rommask = romprops.romsize_bytes - 1;
printf("ramsize=%x rammask=%lx\nromsize=%x rommask=%lx\n", romprops.header.ramsize, rammask, romprops.header.romsize, rommask);
set_saveram_mask(rammask);
set_rom_mask(rommask);
readled(0);
if(flags & LOADROM_WITH_SRAM) {
if(romprops.ramsize_bytes) {
sram_memset(SRAM_SAVE_ADDR, romprops.ramsize_bytes, 0);
strcpy(strrchr((char*)filename, (int)'.'), ".srm");
printf("SRM file: %s\n", filename);
load_sram(filename, SRAM_SAVE_ADDR);
saveram_crc_old = calc_sram_crc(SRAM_SAVE_ADDR, romprops.ramsize_bytes);
} else {
printf("No SRAM\n");
}
}
printf("check MSU...");
if(msu1_check(filename)) {
romprops.fpga_features |= FEAT_MSU1;
romprops.has_msu1 = 1;
} else {
romprops.has_msu1 = 0;
}
printf("done\n");
romprops.fpga_features |= FEAT_SRTC;
romprops.fpga_features |= FEAT_213F;
fpga_set_213f(romprops.region);
fpga_set_features(romprops.fpga_features);
if(flags & LOADROM_WITH_RESET) {
fpga_dspx_reset(1);
snes_reset_pulse();
fpga_dspx_reset(0);
}
return (uint32_t)filesize;
}
void cmd_setfeature(void) {
uint8_t feat = parse_unsigned(0, 255, 16);
fpga_set_features(feat);
}
