*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "mapinc.h"
+static uint8 is2kbank, isnot2kbank, dipreg;
/*void Mapper83_init(void)
{
}
*/
-static void FP_FASTAPASS(1) m83IRQHook(int a)
+static void m83IRQHook(int a)
{
if(IRQa)
{
return mapbyte4[A&3];
}
+static DECLFR(rd5000)
+{
+ return dipreg;
+}
+
static void m83prg(void)
{
ROM_BANK16(0x8000,(mapbyte1[0]&0x3F));
static void m83chr(void)
{
-// if(0)
-// {
-// VROM_BANK2(0x0000,mapbyte2[0]);
-// VROM_BANK2(0x0800,mapbyte2[1]);
-// VROM_BANK2(0x1000,mapbyte2[6]);
-// VROM_BANK2(0x1800,mapbyte2[7]);
-// }
-// else
-// {
+ if(is2kbank&&!isnot2kbank)
+ {
+ VROM_BANK2(0x0000,mapbyte2[0]);
+ VROM_BANK2(0x0800,mapbyte2[1]);
+ VROM_BANK2(0x1000,mapbyte2[6]);
+ VROM_BANK2(0x1800,mapbyte2[7]);
+ }
+ else
+ {
int x;
for(x=0;x<8;x++)
VROM_BANK1(x*0x400,mapbyte2[x]|((mapbyte1[0]&0x30)<<4));
-// }
+ }
}
static DECLFW(Mapper83_write)
//printf("$%04x:$%02x\n",A,V);
switch(A)
{
- case 0x8000:
+ case 0x8000: is2kbank = 1;
case 0xB000:
case 0xB0FF:
case 0xB1FF:
case 0x8302:ROM_BANK8(0xC000,V);break;
case 0x8310:mapbyte2[0]=V;m83chr();break;
case 0x8311:mapbyte2[1]=V;m83chr();break;
- case 0x8312:mapbyte2[2]=V;m83chr();break;
- case 0x8313:mapbyte2[3]=V;m83chr();break;
- case 0x8314:mapbyte2[4]=V;m83chr();break;
- case 0x8315:mapbyte2[5]=V;m83chr();break;
+ case 0x8312:mapbyte2[2]=V;isnot2kbank = 1;m83chr();break; // 2 mappers in one :)
+ case 0x8313:mapbyte2[3]=V;isnot2kbank = 1;m83chr();break;
+ case 0x8314:mapbyte2[4]=V;isnot2kbank = 1;m83chr();break;
+ case 0x8315:mapbyte2[5]=V;isnot2kbank = 1;m83chr();break;
case 0x8316:mapbyte2[6]=V;m83chr();break;
case 0x8317:mapbyte2[7]=V;m83chr();break;
case 0x8318:mapbyte1[1]=V;m83prg();break;
}
+static void m83Reset(void)
+{
+ dipreg^=1;
+}
+
void Mapper83_init(void)
{
+ is2kbank = 0;
+ isnot2kbank = 0;
+ dipreg = 0;
ROM_BANK8(0xc000,0x1e);
ROM_BANK8(0xe000,0x1f);
MapIRQHook=m83IRQHook;
+ MapperReset=m83Reset;
+ SetReadHandler(0x5000,0x5000,rd5000); // title scren dip switch
SetReadHandler(0x5100,0x5103,rdlow);
SetWriteHandler(0x5100,0x5103,wrlow);
SetWriteHandler(0x8000,0xffff,Mapper83_write);