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fceux/mappers/16.c

304 lines
7.4 KiB
C
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/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 1998 BERO
* Copyright (C) 2002 Xodnizel
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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
*/
#include "mapinc.h"
static void FP_FASTAPASS(1) BandaiIRQHook(int a)
{
if(IRQa)
{
IRQCount-=a;
if(IRQCount<0)
{
X6502_IRQBegin(FCEU_IQEXT);
//printf("IRQ: %d, %d\n",scanline,timestamp);
IRQa=0;
IRQCount=0xFFFF;
}
}
}
static DECLFW(Mapper16_write)
{
A&=0xF;
if(A<=0x7)
VROM_BANK1(A<<10,V);
else if(A==0x8)
ROM_BANK16(0x8000,V);
else switch(A) {
case 0x9: switch(V&3) {
case 0x00:MIRROR_SET2(1);break;
case 0x01:MIRROR_SET2(0);break;
case 0x02:onemir(0);break;
case 0x03:onemir(1);break;
}
break;
case 0xA:X6502_IRQEnd(FCEU_IQEXT);
IRQa=V&1;
IRQCount=IRQLatch;
break;
case 0xB:IRQLatch&=0xFF00; IRQLatch|=V;
break;
case 0xC:IRQLatch&=0xFF; IRQLatch|=V<<8;
break;
case 0xD: break;/* Serial EEPROM control port */
}
}
// Famicom jump 2:
// 0-7: Lower bit of data selects which 256KB PRG block is in use.
// This seems to be a hack on the developers' part, so I'll make emulation
// of it a hack(I think the current PRG block would depend on whatever the
// lowest bit of the CHR bank switching register that corresponds to the
// last CHR address read).
static void PRGO(void)
{
uint32 base=(mapbyte1[0]&1)<<4;
ROM_BANK16(0x8000,(mapbyte2[0]&0xF)|base);
ROM_BANK16(0xC000,base|0xF);
}
static DECLFW(Mapper153_write)
{
A&=0xF;
if(A<=0x7)
{
mapbyte1[A&7]=V;
PRGO();
}
else if(A==0x8)
{
mapbyte2[0]=V;
PRGO();
}
else switch(A) {
case 0x9: switch(V&3) {
case 0x00:MIRROR_SET2(1);break;
case 0x01:MIRROR_SET2(0);break;
case 0x02:onemir(0);break;
case 0x03:onemir(1);break;
}
break;
case 0xA:X6502_IRQEnd(FCEU_IQEXT);
IRQa=V&1;
IRQCount=IRQLatch;
break;
case 0xB:IRQLatch&=0xFF00;
IRQLatch|=V;
break;
case 0xC:IRQLatch&=0xFF;
IRQLatch|=V<<8;
break;
}
}
void Mapper16_init(void)
{
MapIRQHook=BandaiIRQHook;
SetWriteHandler(0x6000,0xFFFF,Mapper16_write);
}
void Mapper153_init(void)
{
MapIRQHook=BandaiIRQHook;
SetWriteHandler(0x8000,0xFFFF,Mapper153_write);
/* This mapper/board seems to have WRAM at $6000-$7FFF, so I'll let the
main ines code take care of that memory region. */
}
static uint8 BarcodeData[256];
static int BarcodeReadPos;
static int BarcodeCycleCount;
static uint32 BarcodeOut;
int FCEUI_DatachSet(const uint8 *rcode)
{
int prefix_parity_type[10][6] = {
{0,0,0,0,0,0}, {0,0,1,0,1,1}, {0,0,1,1,0,1}, {0,0,1,1,1,0},
{0,1,0,0,1,1}, {0,1,1,0,0,1}, {0,1,1,1,0,0}, {0,1,0,1,0,1},
{0,1,0,1,1,0}, {0,1,1,0,1,0}
};
int data_left_odd[10][7] = {
{0,0,0,1,1,0,1}, {0,0,1,1,0,0,1}, {0,0,1,0,0,1,1}, {0,1,1,1,1,0,1},
{0,1,0,0,0,1,1}, {0,1,1,0,0,0,1}, {0,1,0,1,1,1,1}, {0,1,1,1,0,1,1},
{0,1,1,0,1,1,1}, {0,0,0,1,0,1,1}
};
int data_left_even[10][7] = {
{0,1,0,0,1,1,1}, {0,1,1,0,0,1,1}, {0,0,1,1,0,1,1}, {0,1,0,0,0,0,1},
{0,0,1,1,1,0,1}, {0,1,1,1,0,0,1}, {0,0,0,0,1,0,1}, {0,0,1,0,0,0,1},
{0,0,0,1,0,0,1}, {0,0,1,0,1,1,1}
};
int data_right[10][7] = {
{1,1,1,0,0,1,0}, {1,1,0,0,1,1,0}, {1,1,0,1,1,0,0}, {1,0,0,0,0,1,0},
{1,0,1,1,1,0,0}, {1,0,0,1,1,1,0}, {1,0,1,0,0,0,0}, {1,0,0,0,1,0,0},
{1,0,0,1,0,0,0}, {1,1,1,0,1,0,0}
};
uint8 code[13+1];
uint32 tmp_p=0;
int i, j;
int len;
for(i=len=0;i<13;i++)
{
if(!rcode[i]) break;
if((code[i]=rcode[i]-'0') > 9)
return(0);
len++;
}
if(len!=13 && len!=12 && len!=8 && len!=7) return(0);
#define BS(x) BarcodeData[tmp_p]=x;tmp_p++
for(j=0;j<32;j++)
{
BS(0x00);
}
/* Left guard bars */
BS(1); BS(0); BS(1);
if(len==13 || len==12)
{
uint32 csum;
for(i=0;i<6;i++)
if(prefix_parity_type[code[0]][i])
{
for(j=0;j<7;j++)
{
BS(data_left_even[code[i+1]][j]);
}
}
else
for(j=0;j<7;j++)
{
BS(data_left_odd[code[i+1]][j]);
}
/* Center guard bars */
BS(0); BS(1); BS(0); BS(1); BS(0);
for(i=7;i<12;i++)
for(j=0;j<7;j++)
{
BS(data_right[code[i]][j]);
}
csum=0;
for(i=0;i<12;i++) csum+=code[i]*((i&1)?3:1);
csum=(10-(csum%10))%10;
//printf("%d\n",csum);
for(j=0;j<7;j++)
{
BS(data_right[csum][j]);
}
}
else if(len==8 || len==7)
{
uint32 csum=0;
for(i=0;i<7;i++) csum+=(i&1)?code[i]:(code[i]*3);
csum=(10-(csum%10))%10;
for(i=0;i<4;i++)
for(j=0;j<7;j++)
{
BS(data_left_odd[code[i]][j]);
}
/* Center guard bars */
BS(0); BS(1); BS(0); BS(1); BS(0);
for(i=4;i<7;i++)
for(j=0;j<7;j++)
{
BS(data_right[code[i]][j]);
}
for(j=0;j<7;j++)
{ BS(data_right[csum][j]);}
}
/* Right guard bars */
BS(1); BS(0); BS(1);
for(j=0;j<32;j++)
{
BS(0x00);
}
BS(0xFF);
#undef BS
BarcodeReadPos=0;
BarcodeOut=0x8;
BarcodeCycleCount=0;
return(1);
}
static void FP_FASTAPASS(1) BarcodeIRQHook(int a)
{
BandaiIRQHook(a);
BarcodeCycleCount+=a;
if(BarcodeCycleCount >= 1000)
{
BarcodeCycleCount -= 1000;
if(BarcodeData[BarcodeReadPos]==0xFF)
{
BarcodeOut=0;
}
else
{
BarcodeOut=(BarcodeData[BarcodeReadPos]^1)<<3;
BarcodeReadPos++;
}
}
}
static DECLFR(Mapper157_read)
{
uint8 ret;
ret=BarcodeOut;
return(ret);
}
void Mapper157_init(void)
{
FCEUGameInfo->cspecial = SIS_DATACH;
MapIRQHook=BarcodeIRQHook;
SetWriteHandler(0x6000,0xFFFF,Mapper16_write);
SetReadHandler(0x6000,0x7FFF,Mapper157_read);
BarcodeData[0]=0xFF;
BarcodeReadPos=0;
BarcodeOut=0;
BarcodeCycleCount=0;
}
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