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https://github.com/dborth/fceugx.git
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306 lines
6.8 KiB
C
306 lines
6.8 KiB
C
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/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 1998 BERO
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* Copyright (C) 2002 Xodnizel
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "mapinc.h"
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static void FP_FASTAPASS(1) BandaiIRQHook(int a)
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{
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if(IRQa)
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{
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IRQCount-=a;
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if(IRQCount<0)
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{
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X6502_IRQBegin(FCEU_IQEXT);
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//printf("IRQ: %d, %d\n",scanline,timestamp);
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IRQa=0;
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IRQCount=0xFFFF;
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}
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}
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}
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static DECLFW(Mapper16_write)
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{
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A&=0xF;
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if(A<=0x7)
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VROM_BANK1(A<<10,V);
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else if(A==0x8)
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ROM_BANK16(0x8000,V);
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else switch(A) {
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case 0x9: switch(V&3) {
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case 0x00:MIRROR_SET2(1);break;
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case 0x01:MIRROR_SET2(0);break;
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case 0x02:onemir(0);break;
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case 0x03:onemir(1);break;
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}
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break;
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case 0xA:X6502_IRQEnd(FCEU_IQEXT);
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IRQa=V&1;
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IRQCount=IRQLatch;
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break;
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case 0xB:IRQLatch&=0xFF00;
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IRQLatch|=V;
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break;
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case 0xC:IRQLatch&=0xFF;
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IRQLatch|=V<<8;
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break;
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case 0xD: break;/* Serial EEPROM control port */
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}
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}
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// Famicom jump 2:
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// 0-7: Lower bit of data selects which 256KB PRG block is in use.
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// This seems to be a hack on the developers' part, so I'll make emulation
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// of it a hack(I think the current PRG block would depend on whatever the
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// lowest bit of the CHR bank switching register that corresponds to the
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// last CHR address read).
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static void PRGO(void)
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{
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uint32 base=(mapbyte1[0]&1)<<4;
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ROM_BANK16(0x8000,(mapbyte2[0]&0xF)|base);
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ROM_BANK16(0xC000,base|0xF);
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}
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static DECLFW(Mapper153_write)
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{
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A&=0xF;
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if(A<=0x7)
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{
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mapbyte1[A&7]=V;
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PRGO();
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}
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else if(A==0x8)
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{
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mapbyte2[0]=V;
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PRGO();
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}
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else switch(A) {
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case 0x9: switch(V&3) {
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case 0x00:MIRROR_SET2(1);break;
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case 0x01:MIRROR_SET2(0);break;
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case 0x02:onemir(0);break;
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case 0x03:onemir(1);break;
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}
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break;
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case 0xA:X6502_IRQEnd(FCEU_IQEXT);
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IRQa=V&1;
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IRQCount=IRQLatch;
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break;
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case 0xB:IRQLatch&=0xFF00;
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IRQLatch|=V;
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break;
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case 0xC:IRQLatch&=0xFF;
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IRQLatch|=V<<8;
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break;
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}
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}
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void Mapper16_init(void)
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{
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MapIRQHook=BandaiIRQHook;
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SetWriteHandler(0x6000,0xFFFF,Mapper16_write);
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}
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void Mapper153_init(void)
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{
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MapIRQHook=BandaiIRQHook;
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SetWriteHandler(0x8000,0xFFFF,Mapper153_write);
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/* This mapper/board seems to have WRAM at $6000-$7FFF, so I'll let the
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main ines code take care of that memory region. */
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}
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static uint8 BarcodeData[256];
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static int BarcodeReadPos;
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static int BarcodeCycleCount;
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static uint32 BarcodeOut;
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int FCEUI_DatachSet(const uint8 *rcode)
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{
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int prefix_parity_type[10][6] = {
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{0,0,0,0,0,0}, {0,0,1,0,1,1}, {0,0,1,1,0,1}, {0,0,1,1,1,0},
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{0,1,0,0,1,1}, {0,1,1,0,0,1}, {0,1,1,1,0,0}, {0,1,0,1,0,1},
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{0,1,0,1,1,0}, {0,1,1,0,1,0}
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};
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int data_left_odd[10][7] = {
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{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},
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{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},
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{0,1,1,0,1,1,1}, {0,0,0,1,0,1,1}
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};
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int data_left_even[10][7] = {
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{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},
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{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},
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{0,0,0,1,0,0,1}, {0,0,1,0,1,1,1}
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};
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int data_right[10][7] = {
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{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},
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{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},
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{1,0,0,1,0,0,0}, {1,1,1,0,1,0,0}
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};
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uint8 code[13+1];
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uint32 tmp_p=0;
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int i, j;
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int len;
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for(i=len=0;i<13;i++)
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{
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if(!rcode[i]) break;
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if((code[i]=rcode[i]-'0') > 9)
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return(0);
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len++;
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}
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if(len!=13 && len!=12 && len!=8 && len!=7) return(0);
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#define BS(x) BarcodeData[tmp_p]=x;tmp_p++
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for(j=0;j<32;j++)
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{
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BS(0x00);
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}
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/* Left guard bars */
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BS(1); BS(0); BS(1);
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if(len==13 || len==12)
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{
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uint32 csum;
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for(i=0;i<6;i++)
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if(prefix_parity_type[code[0]][i])
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{
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for(j=0;j<7;j++)
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{
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BS(data_left_even[code[i+1]][j]);
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}
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}
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else
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for(j=0;j<7;j++)
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{
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BS(data_left_odd[code[i+1]][j]);
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}
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/* Center guard bars */
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BS(0); BS(1); BS(0); BS(1); BS(0);
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for(i=7;i<12;i++)
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for(j=0;j<7;j++)
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{
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BS(data_right[code[i]][j]);
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}
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csum=0;
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for(i=0;i<12;i++) csum+=code[i]*((i&1)?3:1);
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csum=(10-(csum%10))%10;
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//printf("%d\n",csum);
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for(j=0;j<7;j++)
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{
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BS(data_right[csum][j]);
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}
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}
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else if(len==8 || len==7)
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{
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uint32 csum=0;
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for(i=0;i<7;i++) csum+=(i&1)?code[i]:(code[i]*3);
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csum=(10-(csum%10))%10;
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for(i=0;i<4;i++)
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for(j=0;j<7;j++)
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{
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BS(data_left_odd[code[i]][j]);
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}
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/* Center guard bars */
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BS(0); BS(1); BS(0); BS(1); BS(0);
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for(i=4;i<7;i++)
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for(j=0;j<7;j++)
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{
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BS(data_right[code[i]][j]);
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}
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for(j=0;j<7;j++)
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{ BS(data_right[csum][j]);}
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}
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/* Right guard bars */
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BS(1); BS(0); BS(1);
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for(j=0;j<32;j++)
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{
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BS(0x00);
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}
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BS(0xFF);
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#undef BS
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BarcodeReadPos=0;
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BarcodeOut=0x8;
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BarcodeCycleCount=0;
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return(1);
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}
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static void FP_FASTAPASS(1) BarcodeIRQHook(int a)
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{
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BandaiIRQHook(a);
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BarcodeCycleCount+=a;
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if(BarcodeCycleCount >= 1000)
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{
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BarcodeCycleCount -= 1000;
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if(BarcodeData[BarcodeReadPos]==0xFF)
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{
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BarcodeOut=0;
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}
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else
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{
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BarcodeOut=(BarcodeData[BarcodeReadPos]^1)<<3;
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BarcodeReadPos++;
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}
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}
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}
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static DECLFR(Mapper157_read)
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{
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uint8 ret;
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ret=BarcodeOut;
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return(ret);
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}
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void Mapper157_init(void)
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{
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FCEUGameInfo->cspecial = SIS_DATACH;
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MapIRQHook=BarcodeIRQHook;
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SetWriteHandler(0x6000,0xFFFF,Mapper16_write);
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SetReadHandler(0x6000,0x7FFF,Mapper157_read);
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BarcodeData[0]=0xFF;
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BarcodeReadPos=0;
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BarcodeOut=0;
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BarcodeCycleCount=0;
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}
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