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add GameGenie / Pro Action Replay(PAR) support to SNES.

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for .ini files (f.ex, support/cheats/snes_ffight2.ini)
This commit is contained in:
dinkc64 2024-11-14 01:41:51 -05:00
parent ab8621536c
commit 714b7f17e9
3 changed files with 123 additions and 4 deletions
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3
src/burn/cheat.cpp
View File

@ -5,7 +5,8 @@
#define CHEAT_MAXCPU 8 // enough?
#define HW_NES ( ((BurnDrvGetHardwareCode() & HARDWARE_PUBLIC_MASK) == HARDWARE_NES) || ((BurnDrvGetHardwareCode() & HARDWARE_PUBLIC_MASK) == HARDWARE_FDS) )
// any system that uses Game Genie/Pro Action Replay codes can be defined as HW_NES...
#define HW_NES ( ((BurnDrvGetHardwareCode() & HARDWARE_PUBLIC_MASK) == HARDWARE_SNES) || ((BurnDrvGetHardwareCode() & HARDWARE_PUBLIC_MASK) == HARDWARE_NES) || ((BurnDrvGetHardwareCode() & HARDWARE_PUBLIC_MASK) == HARDWARE_FDS) )
void (*nes_add_cheat)(char *) = NULL;
void (*nes_remove_cheat)(char *) = NULL;

120
src/burn/drv/snes/snes.cpp
View File

@ -27,6 +27,7 @@ static uint8_t snes_rread(Snes* snes, uint32_t adr); // wrapped by read, to set
static int snes_getAccessTime(Snes* snes, uint32_t adr);
static void build_accesstime(Snes* snes);
static void free_accesstime();
static void snes_init_fbn_cheat_subsys();
static uint8_t *access_time;
@ -41,6 +42,8 @@ Snes* snes_init(void) {
snes->input2 = input_init(snes, 2);
snes->palTiming = false;
snes_init_fbn_cheat_subsys();
return snes;
}
@ -649,9 +652,124 @@ static void free_accesstime() {
BurnFree(access_time);
}
// game genie/par cheat system
static UINT8 gg_nibble(UINT8 g)
{
const UINT8 gg_str[] = "DF4709156BC8A23E";
for (UINT8 i = 0; i < 0x10; i++) {
if (g == gg_str[i]) {
return i;
}
}
return 0;
}
static INT32 gg_decode(char *gg_code, UINT32 &address, UINT8 &value)
{
UINT32 type = strlen(gg_code);
UINT32 temp = 0;
if (type != 8 && type != 9) {
// bad code!
return 1;
}
switch (type) {
case 8: { // Pro Action Replay (PAR)
temp = (UINT32)strtoul(gg_code, NULL, 16);
address = (temp >> 8) & 0xffffff;
value = temp & 0xff;
break;
}
case 9: { // Game Genie
for (int i = 0; i < 9; i++) {
if (i != 4) temp = (temp << 4) | gg_nibble(gg_code[i]);
}
value = (temp >> 24) & 0xff;
address = (temp >> 10) & 0xf;
address = (address << 4) | ((temp >> 2) & 0xf);
address = (address << 4) | ((temp >> 20) & 0xf);
address = (address << 4) | ((temp << 2) & 0xc) | ((temp >> 14) & 0x3);
address = (address << 4) | ((temp >> 16) & 0xf);
address = (address << 4) | ((temp >> 6) & 0xf);
break;
}
}
return 0;
}
static const INT32 cheat_MAX = 0x100;
static INT32 cheats_active = 0;
struct cheat_struct {
char code[0x10]; // gamegenie, par code
UINT32 address;
UINT8 value;
};
static cheat_struct cheats[cheat_MAX];
static void snes_add_cheat(char *code)
{
UINT32 address;
UINT8 value;
if (!gg_decode(code, address, value) && cheats_active < (cheat_MAX-1)) {
strncpy(cheats[cheats_active].code, code, 9);
cheats[cheats_active].address = address;
cheats[cheats_active].value = value;
bprintf(0, _T("cheat #%d (%S) added. (%x, %x)\n"), cheats_active, cheats[cheats_active].code, address, value);
cheats_active++;
} else {
if (cheats_active < (cheat_MAX-1)) {
bprintf(0, _T("snes cheat engine: bad GameGenie code %S\n"), code);
} else {
bprintf(0, _T("snes cheat engine: too many active!\n"));
}
}
}
static void snes_remove_cheat(char *code)
{
cheat_struct cheat_temp[cheat_MAX];
INT32 temp_num = 0;
for (INT32 i = 0; i < cheats_active; i++) {
if (strcmp(code, cheats[i].code) != 0) {
memcpy(&cheat_temp[temp_num], &cheats[i], sizeof(cheat_struct));
temp_num++;
} else {
bprintf(0, _T("cheat %S disabled.\n"), cheats[i].code);
}
}
memcpy(cheats, cheat_temp, sizeof(cheats));
cheats_active = temp_num;
}
static void snes_init_fbn_cheat_subsys()
{
nes_init_cheat_functions(snes_add_cheat, snes_remove_cheat);
}
static inline UINT8 cheat_check(UINT32 address, UINT8 value)
{
for (INT32 i = 0; i < cheats_active; i++) {
if (cheats[i].address == address) {
//bprintf(0, _T("."));
return cheats[i].value;
}
}
return value;
}
uint8_t snes_read(Snes* snes, uint32_t adr) {
snes->adrBus = adr;
uint8_t val = snes_rread(snes, adr);
const uint8_t val = cheat_check(adr, snes_rread(snes, adr));
snes->openBus = val;
return val;
}

4
src/burner/conc.cpp
View File

@ -1,6 +1,6 @@
#include "burner.h"
#define HW_NES ( ((BurnDrvGetHardwareCode() & HARDWARE_PUBLIC_MASK) == HARDWARE_NES) || ((BurnDrvGetHardwareCode() & HARDWARE_PUBLIC_MASK) == HARDWARE_FDS) )
#define HW_NES ( ((BurnDrvGetHardwareCode() & HARDWARE_PUBLIC_MASK) == HARDWARE_SNES) || ((BurnDrvGetHardwareCode() & HARDWARE_PUBLIC_MASK) == HARDWARE_NES) || ((BurnDrvGetHardwareCode() & HARDWARE_PUBLIC_MASK) == HARDWARE_FDS) )
static bool SkipComma(TCHAR** s)
{
@ -237,7 +237,7 @@ static INT32 ConfigParseFile(TCHAR* pszFilename)
for (INT32 z = 0; z < strlen(t); z++) {
#endif
char c = toupper((char)*s);
if (c >= 'A' && c <= 'Z' && newlen < 10)
if ( ((c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || (c == '-' || c == ':')) && newlen < 10)
pCurrentCheat->pOption[n]->AddressInfo[nCurrentAddress].szGenieCode[newlen++] = c;
s++;
if (*s == _T(',')) break;