mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-09-19 04:39:42 +02:00
99 lines
2.7 KiB
C
99 lines
2.7 KiB
C
/****************************************************************************
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* Super Street Fighter 2 - The New Challengers
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*
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* This is the ROM mapper for this game.
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* Called from mem68k.c
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***************************************************************************/
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#include "shared.h"
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#ifdef NGC
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char *shadow_rom = (char *) 0x8000;
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#else
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char shadow_rom[0x500000];
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#endif
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int SSF2TNC = 0;
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static int oldaddr = 0;
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static uint8 olddata = 0;
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void ssf2bankrom (int address, unsigned char data)
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{
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/* Banking performed on odd addresses only */
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if (!(address & 1)) return;
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/*
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* Whilst debugging the ARAM stuff, I noticed that this ROM
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* requested the same address/data on subsequent calls.
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* This is just a little speedup, which seems to make the
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* sound etc in the intro much less choppy.
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*
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* Happy dance anyone?
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*/
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if ((oldaddr == address) && (olddata == data)) return;
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if ((address > 0xa130f2) && (address < 0xa13100))
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{
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switch (address & 0xf)
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{
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case 0x3: /* 080000-0FFFFF */
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#ifdef NGC
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ARAMFetch (cart_rom + 0x080000, shadow_rom + (data * 0x80000), 0x80000);
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#else
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memcpy (cart_rom + 0x080000, shadow_rom + (data * 0x80000), 0x80000);
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#endif
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break;
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case 0x5: /* 100000 - 17FFFF */
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#ifdef NGC
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ARAMFetch (cart_rom + 0x100000, shadow_rom + (data * 0x80000), 0x80000);
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#else
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memcpy (cart_rom + 0x100000, shadow_rom + (data * 0x80000), 0x80000);
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#endif
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break;
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case 0x7: /* 180000 - 1FFFFF */
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#ifdef NGC
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ARAMFetch (cart_rom + 0x180000, shadow_rom + ( data * 0x80000), 0x80000);
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#else
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memcpy (cart_rom + 0x180000, shadow_rom + ( data * 0x80000), 0x80000);
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#endif
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break;
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case 0x9: /* 200000 - 27FFFF */
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#ifdef NGC
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ARAMFetch (cart_rom + 0x200000, shadow_rom + ( data * 0x80000), 0x80000);
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#else
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memcpy (cart_rom + 0x200000, shadow_rom + ( data * 0x80000), 0x80000);
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#endif
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break;
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case 0xb: /* 280000 - 2FFFFF */
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#ifdef NGC
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ARAMFetch (cart_rom + 0x280000, shadow_rom + ( data * 0x80000), 0x80000);
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#else
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memcpy (cart_rom + 0x280000, shadow_rom + ( data * 0x80000), 0x80000);
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#endif
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break;
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case 0xd: /* 300000 - 37FFFF */
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#ifdef NGC
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ARAMFetch (cart_rom + 0x300000, shadow_rom + ( data * 0x80000), 0x80000);
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#else
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memcpy (cart_rom + 0x300000, shadow_rom + ( data * 0x80000), 0x80000);
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#endif
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break;
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case 0xf: /* 380000 - 3FFFFF */
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#ifdef NGC
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ARAMFetch (cart_rom + 0x380000, shadow_rom + ( data * 0x80000), 0x80000);
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#else
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memcpy (cart_rom + 0x380000, shadow_rom + ( data * 0x80000), 0x80000);
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#endif
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break;
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}
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}
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oldaddr = address;
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olddata = data;
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}
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