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Mapper42: Support for 256K prg rom fds conversion of Green Beret

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This commit is contained in:
negativeExponent
2020-03-05 22:27:19 +08:00
parent e9eb314311
commit 80b002a04e
4 changed files with 21 additions and 5 deletions
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8
src/boards/42.c
View File

@@ -18,7 +18,8 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* FDS Conversion
*
* - Ai Senshi Nicol (256K PRG, 128K CHR)
* - Bio Miracle Bokutte Upa (J) (128K PRG, 0K CHR)
*/
#include "mapinc.h"
@@ -76,6 +77,11 @@ static void StateRestore(int version) {
}
void Mapper42_Init(CartInfo *info) {
if (info->CHRRomSize == 0 && info->PRGRomSize > 131072) {
/* Green Beret FDS Conversion can be 160K or 256K */
AC08_Init(info);
return;
}
info->Power = M42Power;
MapIRQHook = M42IRQHook;
GameStateRestore = StateRestore;

8
src/boards/ac-08.c
View File

@@ -18,12 +18,15 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* FDS Conversion
* - [UNIF] Green Beret (FDS Conversion, LH09) (Unl) [U][!][t1] (160K PRG)
* - Green Beret (FDS Conversion) (Unl) (256K PRG)
*
*/
#include "mapinc.h"
static uint8 reg, mirr;
static uint8 prg;
static SFORMAT StateRegs[] =
{
@@ -34,7 +37,7 @@ static SFORMAT StateRegs[] =
static void Sync(void) {
setprg8(0x6000, reg);
setprg32(0x8000, 4);
setprg32(0x8000, prg);
setchr8(0);
setmirror(mirr);
}
@@ -45,7 +48,7 @@ static DECLFW(AC08Mirr) {
}
static DECLFW(AC08Write) {
if (A == 0x8001) /* Green Berret bank switching is only 100x xxxx xxxx xxx1 mask */
if (A == 0x8001) /* Green Berret prg switching is only 100x xxxx xxxx xxx1 mask */
reg = (V >> 1) & 0xf;
else
reg = V & 0xf; /* Sad But True, 2-in-1 mapper, Green Berret need value shifted left one byte, Castlevania doesn't */
@@ -65,6 +68,7 @@ static void StateRestore(int version) {
}
void AC08_Init(CartInfo *info) {
prg = (info->PRGRomSize / 16384) & 0x0F ? 4 : 7;
info->Power = AC08Power;
GameStateRestore = StateRestore;
AddExState(&StateRegs, ~0, 0, 0);