Update Alien Challenge to use proper protection emulation and remove patches.
This commit is contained in:
iq_132
parent
1cd3992bcc
commit
c8faa5dfac
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@ -33,7 +33,6 @@ static UINT8 *DrvVidRAM2 = NULL;
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static UINT8 *DrvVidRAM3 = NULL;
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static UINT8 *DrvScrRAM = NULL;
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static UINT8 *DrvSprRAM = NULL;
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static UINT8 *DrvProtRAM = NULL;
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static UINT8 *DrvZ80RAM = NULL;
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static UINT32 *DrvPalette = NULL;
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@ -299,33 +298,116 @@ static void lordgun_update_gun(INT32 i)
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}
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}
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static void lordgun_protection_w(UINT8 offset)
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static void lordgun_protection_write(UINT32 offset)
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{
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switch (offset & 0xc0)
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switch (offset & 0x60)
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{
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case 0x00:
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case 0x00/2: // increment counter
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{
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lordgun_protection_data++;
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return;
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lordgun_protection_data &= 0x1f;
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case 0xc0:
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return;
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}
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case 0xc0/2: // reset protection device
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{
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lordgun_protection_data = 0;
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return;
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return;
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}
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}
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}
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static UINT8 lordgun_protection_r()
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static UINT8 lordgun_protection_read(INT32 offset)
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{
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if ((lordgun_protection_data & 0x11) == 0x01) return 0x10;
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if ((lordgun_protection_data & 0x06) == 0x02) return 0x10;
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if ((lordgun_protection_data & 0x09) == 0x08) return 0x10;
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switch (offset & 0x60)
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{
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case 0x40/2: // bitswap and xor counter
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{
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UINT8 x = lordgun_protection_data;
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lordgun_protection_data = ((( x >> 0) | ( x >> 1)) & 1) << 4;
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lordgun_protection_data |= ((~x >> 2) & 1) << 3;
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lordgun_protection_data |= (((~x >> 4) | ( x >> 0)) & 1) << 2;
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lordgun_protection_data |= (( x >> 3) & 1) << 1;
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lordgun_protection_data |= (((~x >> 0) | ( x >> 2)) & 1) << 0;
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return 0;
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}
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case 0x80/2: // return value if conditions are met
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{
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if ((lordgun_protection_data & 0x11) == 0x01) return 0x10;
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if ((lordgun_protection_data & 0x06) == 0x02) return 0x10;
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if ((lordgun_protection_data & 0x09) == 0x08) return 0x10;
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return 0;
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}
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}
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return 0;
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}
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static void aliencha_protection_write(UINT32 offset)
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{
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switch (offset & 0x60)
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{
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case 0xc0/2: // reset protection device
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{
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lordgun_protection_data = 0;
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return;
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}
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}
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}
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static UINT8 aliencha_protection_read(INT32 offset)
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{
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switch (offset & 0x60)
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{
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case 0x00/2: // de-increment counter
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{
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lordgun_protection_data--;
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lordgun_protection_data &= 0x1f;
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return 0;
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}
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case 0x40/2: // bitswap and xor counter
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{
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UINT8 x = lordgun_protection_data;
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lordgun_protection_data = (((x >> 3) ^ (x >> 2)) & 1) << 4;
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lordgun_protection_data |= (((x >> 2) ^ (x >> 1)) & 1) << 3;
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lordgun_protection_data |= (((x >> 1) ^ (x >> 0)) & 1) << 2;
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lordgun_protection_data |= (((x >> 4) ^ (x >> 0)) & 1) << 1;
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lordgun_protection_data |= (((x >> 4) ^ (x >> 3)) & 1) << 0;
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return 0;
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}
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case 0x80/2: // return value if conditions are met
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{
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if ((lordgun_protection_data & 0x11) == 0x00) return 0x20;
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if ((lordgun_protection_data & 0x06) != 0x06) return 0x20;
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if ((lordgun_protection_data & 0x18) == 0x00) return 0x20;
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return 0;
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}
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}
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return 0;
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}
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void __fastcall lordgun_write_word(UINT32 address, UINT16 data)
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{
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if ((address & 0xfffff00) == 0x50a900) {
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lordgun_protection_w(address);
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lordgun_protection_write(address/2);
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return;
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}
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if ((address & 0xfffff00) == 0x50b900) {
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aliencha_protection_write(address/2);
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return;
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}
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@ -391,13 +473,17 @@ void __fastcall lordgun_write_word(UINT32 address, UINT16 data)
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void __fastcall lordgun_write_byte(UINT32 /*address*/, UINT8 /*data*/)
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{
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// address = data; // kill warnings...
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}
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UINT16 __fastcall lordgun_read_word(UINT32 address)
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{
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if ((address & 0xfffff00) == 0x50a900) {
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return lordgun_protection_r();
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return lordgun_protection_read(address/2);
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}
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if ((address & 0xfffff00) == 0x50b900) {
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return aliencha_protection_read(address/2);
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}
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switch (address)
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@ -678,7 +764,6 @@ static INT32 MemIndex()
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DrvVidRAM3 = Next; Next += 0x002000;
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DrvScrRAM = Next; Next += 0x000800;
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DrvSprRAM = Next; Next += 0x000800;
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DrvProtRAM = Next; Next += 0x000400;
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DrvPalRAM = Next; Next += 0x001000;
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DrvZ80RAM = Next; Next += 0x001000;
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@ -779,8 +864,6 @@ static INT32 DrvInit(INT32 (*pInitCallback)(), INT32 lordgun)
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SekMapMemory(DrvScrRAM, 0x31c000, 0x31c7ff, SM_RAM);
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SekMapMemory(DrvSprRAM, 0x400000, 0x4007ff, SM_RAM);
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SekMapMemory(DrvPalRAM, 0x500000, 0x500fff, SM_RAM);
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// SekMapMemory(DrvProtRAM, 0x50a800, 0x50abff, SM_RAM); // 900-9ff (lordgun)
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SekMapMemory(DrvProtRAM, 0x50b800, 0x50bbff, SM_RAM); // 900-9ff (aliencha)
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SekSetWriteWordHandler(0, lordgun_write_word);
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SekSetWriteByteHandler(0, lordgun_write_byte);
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SekSetReadWordHandler(0, lordgun_read_word);
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@ -921,24 +1004,6 @@ static INT32 alienchaLoadRoms()
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if (BurnLoadRom(DrvSndROM2 + 0x000000, 13, 1)) return 1;
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UINT16 *rom = (UINT16*)Drv68KROM;
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rom[0x0A558/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 0A558 beq.s $A56C
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rom[0x0A8DC/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 0A8DC beq.s $A8F0
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rom[0x0AC92/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 0AC92 beq.s $ACA6
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rom[0x124CC/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 124CC beq.s $124E0
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rom[0x12850/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 12850 beq.s $12864
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rom[0x12C06/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 12C06 beq.s $12C1A
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rom[0x1862A/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 1862A beq.s $1863E
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rom[0x189AE/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 189AE beq.s $189C2
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rom[0x18D64/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 18D64 beq.s $18D78
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rom[0x230FC/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 230FC beq.s $23110
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rom[0x23480/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 23480 beq.s $23494
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rom[0x23836/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 23836 beq.s $2384A
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rom[0x2BD0E/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 2BD0E beq.s $2BD22
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rom[0x2C092/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 2C092 beq.s $2C0A6
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rom[0x2C448/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 2C448 beq.s $2C45C
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return 0;
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}
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@ -969,24 +1034,6 @@ static INT32 alienchacLoadRoms()
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if (BurnLoadRom(DrvSndROM2 + 0x000000, 15, 1)) return 1;
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UINT16 *rom = (UINT16*)Drv68KROM;
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rom[0x0A550/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 0A558 beq.s $A564
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rom[0x0A8D4/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 0A8D4 beq.s $A8E8
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rom[0x0AC8A/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 0AC8A beq.s $AC9E
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rom[0x124B8/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 124B8 beq.s $124CC
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rom[0x1283C/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 1283C beq.s $12850
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rom[0x12BF2/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 12BF2 beq.s $12C06
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rom[0x18616/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 18616 beq.s $1862A
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rom[0x1899A/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 1899A beq.s $189AE
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rom[0x18D50/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 18D50 beq.s $18D64
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rom[0x230E8/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 230E8 beq.s $230FC
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rom[0x2346C/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 2346C beq.s $23480
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rom[0x23822/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 23822 beq.s $23822
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rom[0x2BCFA/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 2BCFA beq.s $2BD0E
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rom[0x2C07E/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 2C07E beq.s $2C092
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rom[0x2C434/2] = BURN_ENDIAN_SWAP_INT16(0x6012); // 2C434 beq.s $2C448
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return 0;
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}
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