RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 07:17:45 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

sms, improve ROM bank mapping, add some SRAM support

Browse source
This commit is contained in:
kub 2021-10-03 23:59:09 +02:00
parent 15caa286fc
commit b784d4a5f7
4 changed files with 69 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

16
pico/cart.c
View file

@ -34,6 +34,7 @@ void (*PicoCDLoadProgressCB)(const char *fname, int percent) = NULL; // handled
int PicoGameLoaded;
static void PicoCartDetect(const char *carthw_cfg);
static void PicoCartDetectMS(void);
/* cso struct */
typedef struct _cso_struct
@ -850,6 +851,8 @@ int PicoCartInsert(unsigned char *rom, unsigned int romsize, const char *carthw_
if (!(PicoIn.AHW & (PAHW_MCD|PAHW_SMS)))
PicoCartDetect(carthw_cfg);
else if (PicoIn.AHW & PAHW_SMS)
PicoCartDetectMS();
// setup correct memory map for loaded ROM
switch (PicoIn.AHW) {
@ -1320,4 +1323,17 @@ static void PicoCartDetect(const char *carthw_cfg)
*(u32 *) (Pico.rom + 0x1f0) = CPU_LE4(0x20204520);
}
static void PicoCartDetectMS(void)
{
memset(&Pico.sv, 0, sizeof(Pico.sv));
// Always map SRAM, since there's no indicator in ROM if it's needed or not
// TODO: this should somehow be coming from a cart database!
Pico.sv.size = 0x8000; // Sega mapper, 2 banks of 16 KB each
Pico.sv.flags |= SRF_ENABLED;
Pico.sv.data = calloc(Pico.sv.size, 1);
if (Pico.sv.data == NULL)
Pico.sv.flags &= ~SRF_ENABLED;
}
// vim:shiftwidth=2:expandtab