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loader.c
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#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200809L
#undef _GNU_SOURCE
#define _GNU_SOURCE
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h>
#include "defs.h"
#include "regs.h"
#include "mem.h"
#include "hw.h"
#include "rtc.h"
#include "rc.h"
#include "lcd.h"
#include "save.h"
#include "sound.h"
#include "sys.h"
static const int mbc_table[256] =
{
0, 1, 1, 1, 0, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 3,
3, 3, 3, 3, 0, 0, 0, 0, 0, 5, 5, 5, MBC_RUMBLE, MBC_RUMBLE, MBC_RUMBLE, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, MBC_HUC3, MBC_HUC1
};
static const int rtc_table[256] =
{
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0
};
static const int batt_table[256] =
{
0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0,
1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0,
0
};
static const int romsize_table[256] =
{
2, 4, 8, 16, 32, 64, 128, 256, 512,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 128, 128, 128
/* 0, 0, 72, 80, 96 -- actual values but bad to use these! */
};
static const int ramsize_table[256] =
{
1, 1, 1, 4, 16,
4 /* FIXME - what value should this be?! */
};
static char *romfile;
static char *sramfile;
static char *rtcfile;
static char *saveprefix;
static char *savename;
static char *savedir;
static int saveslot;
static int forcebatt, nobatt;
static int forcedmg, gbamode;
static int memfill = -1, memrand = -1;
static void initmem(void *mem, int size)
{
char *p = mem;
if (memrand >= 0)
{
srand(memrand ? memrand : time(0));
while(size--) *(p++) = rand();
}
else if (memfill >= 0)
memset(p, memfill, size);
}
static byte *decompress(byte *data, int *len)
{
unsigned long pos = 0;
if (data[0] != 0x1f || data[1] != 0x8b)
{
printf("not compressed\n");
return data;
}
die("compressed roms not supported\n");
}
int rom_load(const byte * data, int len)
{
byte c, *header;
/// if (!ram) ram = calloc(sizeof *ram, 1);
/// if (!rom) rom = calloc(sizeof *rom, 1);
/// if (!ram) ram = ps_calloc(sizeof *ram, 1);
/// if (!rom) rom = ps_calloc(sizeof *rom, 1);
/// if (!ram || !rom) die("ram=%p rom=%p\n", ram, rom);
/// printf("%s: ram=%p rom=%p\n", __func__, ram, rom);
header = data = decompress(data, &len);
memcpy(rom.name, header+0x0134, 16);
if (rom.name[14] & 0x80) rom.name[14] = 0;
if (rom.name[15] & 0x80) rom.name[15] = 0;
rom.name[16] = 0;
c = header[0x0147];
mbc.type = mbc_table[c];
mbc.batt = (batt_table[c] && !nobatt) || forcebatt;
rtc.batt = rtc_table[c];
mbc.romsize = romsize_table[header[0x0148]];
mbc.ramsize = ramsize_table[header[0x0149]];
printf("ROM name: '%s'\n", rom.name);
printf("ROM size: %d\n", mbc.romsize);
printf("RAM size: %d\n", mbc.ramsize);
if (!mbc.romsize) die("unknown ROM size %02X\n", header[0x0148]);
if (!mbc.ramsize) die("unknown SRAM size %02X\n", header[0x0149]);
const int rlen = 16384 * mbc.romsize;
if (rlen != len)
die("ROM len %d != image len %d\n", rlen, len);
rom.bank = data;
ram.sbank = malloc(8192 * mbc.ramsize);
printf("%s: ram.sbank=%p\n", __func__, ram.sbank);
if (!ram.sbank)
die("RAM allocate %d failed\n", 8192 * mbc.ramsize);
initmem(ram.sbank, 8192 * mbc.ramsize);
initmem(ram.ibank, 4096 * 8);
mbc.rombank = 1;
mbc.rambank = 0;
c = header[0x0143];
hw.cgb = ((c == 0x80) || (c == 0xc0)) && !forcedmg;
hw.gba = (hw.cgb && gbamode);
return 0;
}
void loader_unload()
{
/// sram_save();
/// rtc_save();
/// if (romfile) free(romfile);
/// if (sramfile) free(sramfile);
/// if (rtcfile) free(rtcfile);
/// if (saveprefix) free(saveprefix);
if (rom.bank) free(rom.bank);
if (ram.sbank) free(ram.sbank);
romfile = sramfile = saveprefix = rtcfile = 0;
rom.bank = 0;
ram.sbank = 0;
mbc.type = mbc.romsize = mbc.ramsize = mbc.batt = 0;
}