RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-06 23:58:04 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

added 12-in-1 mapper to carthw

Browse source 
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@369 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2008-03-05 18:50:28 +00:00
parent 48df6e9e54
commit 757f8dae1a
7 changed files with 87 additions and 22 deletions
Download patch file Download diff file Expand all files Collapse all files

52
Pico/carthw/carthw.c Normal file
View file

@ -0,0 +1,52 @@
#include "../PicoInt.h"
/* 12-in-1 */
static unsigned int carthw_12in1_read16(unsigned int a, int realsize)
{
// ??
elprintf(EL_UIO, "12-in-1: read [%06x] @ %06x", a, SekPc);
return 0;
}
static void carthw_12in1_write8(unsigned int a, unsigned int d, int realsize)
{
int len;
if (a < 0xA13000 || a >= 0xA13040) {
elprintf(EL_ANOMALY, "12-in-1: unexpected write [%06x] %02x @ %06x", a, d, SekPc);
}
a &= 0x3f; a <<= 16;
len = Pico.romsize - a;
if (len <= 0) {
elprintf(EL_ANOMALY, "12-in-1: missing bank @ %06x", a);
return;
}
memcpy(Pico.rom, Pico.rom + 0x200000 + a, len);
}
static void carthw_12in1_reset(void)
{
carthw_12in1_write8(0xA13000, 0, 0);
}
void carthw_12in1_startup(void)
{
void *tmp;
elprintf(EL_STATUS, "12-in-1 mapper detected");
tmp = realloc(Pico.rom, 0x200000 + 0x200000);
if (tmp == NULL)
{
elprintf(EL_STATUS, "OOM");
return;
}
memcpy(Pico.rom + 0x200000, Pico.rom, 0x200000);
PicoRead16Hook = carthw_12in1_read16;
PicoWrite8Hook = carthw_12in1_write8;
PicoResetHook = carthw_12in1_reset;
}