mirror of
https://github.com/holub/mame
synced 2025-04-23 17:00:53 +03:00
Fix for chinatow regression, separating rcdino4 decryption WIP (nw)
This commit is contained in:
Scott Stone
parent
40d14ae043
commit
5110021c36
@ -6124,27 +6124,13 @@ DRIVER_INIT_MEMBER(funworld_state, ctunk)
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}
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DRIVER_INIT_MEMBER(funworld_state, rcdino4)
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/*****************************************************
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Dino4 hardware with CPU+PLCC daughterboard
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Program ROM data & address lines are swapped.
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GFX ROMs address lines are swapped and data encrypted.
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Color PROM seems straight.
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******************************************************/
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static void decrypt_rcdino4(UINT8 *rom, int size, UINT8 *gfxrom, int sizeg, UINT8 *src)
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{
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UINT8 *rom = memregion("maincpu")->base();
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int size = memregion("maincpu")->bytes();
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int start = 0x0000;
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UINT8 *gfxrom = memregion("gfx1")->base();
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int sizeg = memregion("gfx1")->bytes();
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int startg = 0;
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int i, a, j;
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int i, a;
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/*****************************
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* Program ROM decryption *
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@ -6170,140 +6156,8 @@ DRIVER_INIT_MEMBER(funworld_state, rcdino4)
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rom[a] = buffer[i];
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}
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j = 0;
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for (i = 0x8101; i < 0x8173;)
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{
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rom[i] ^= 0xb8;
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switch (j)
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{
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case 0:
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case 2:
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case 4:
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case 5:
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{
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i += 2;
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break;
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}
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case 1:
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case 3:
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case 6:
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{
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i += 3;
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break;
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}
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default: /* case 7 */
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{
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i += 2;
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j = 0;
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}
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}
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++j;
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}
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/* I could not find any obvious pattern to these */
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rom[0x8174] ^= 0xb8;
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rom[0x8176] ^= 0xb8;
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rom[0x8177] ^= 0xb8;
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rom[0x8179] ^= 0xb8;
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rom[0x817b] ^= 0xb8;
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rom[0x817d] ^= 0xb8;
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rom[0x8180] ^= 0xb8;
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rom[0x8183] ^= 0xb8;
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rom[0x8185] ^= 0xb8;
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rom[0x8187] ^= 0xb8;
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rom[0x818a] ^= 0xb8;
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rom[0x818c] ^= 0xb8;
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rom[0x818f] ^= 0xb8;
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rom[0x8192] ^= 0xb8;
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rom[0x8195] ^= 0xb8;
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rom[0x8198] ^= 0xb8;
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rom[0x819b] ^= 0xb8;
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rom[0x819d] ^= 0xb8;
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rom[0x81a0] ^= 0xb8;
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rom[0x81b2] ^= 0xb8;
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rom[0x81b3] ^= 0xb8;
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rom[0x81b4] ^= 0xb8;
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rom[0x81b5] ^= 0xb8;
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rom[0x81b7] ^= 0xb8;
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rom[0x81b9] ^= 0xb8;
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rom[0x81bb] ^= 0xb8;
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rom[0x81bd] ^= 0xb8;
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rom[0x81bf] ^= 0xb8;
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rom[0x81c1] ^= 0xb8;
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rom[0x81c3] ^= 0xb8;
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rom[0x81c5] ^= 0xb8;
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rom[0x81c7] ^= 0xb8;
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rom[0x81c9] ^= 0xb8;
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rom[0x81cb] ^= 0xb8;
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rom[0x81cd] ^= 0xb8;
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rom[0x81ce] ^= 0xb8;
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rom[0x81d0] ^= 0xb8;
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rom[0x81d2] ^= 0xb8;
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rom[0x81d3] ^= 0xb8;
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rom[0x81d5] ^= 0xb8;
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rom[0x81d6] ^= 0xb8;
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rom[0x81d8] ^= 0xb8;
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rom[0x81db] ^= 0xb8;
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rom[0x81dd] ^= 0xb8;
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rom[0x81df] ^= 0xb8;
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rom[0x81e0] ^= 0xb8;
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rom[0x81e2] ^= 0xb8;
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rom[0x81e5] ^= 0xb8;
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rom[0x81e7] ^= 0xb8;
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rom[0x81ea] ^= 0xb8;
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rom[0x81ec] ^= 0xb8;
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rom[0x81ef] ^= 0xb8;
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rom[0x81f1] ^= 0xb8;
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rom[0x81f4] ^= 0xb8;
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rom[0x81f6] ^= 0xb8;
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rom[0x81f9] ^= 0xb8;
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rom[0x81fb] ^= 0xb8;
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rom[0x81fe] ^= 0xb8;
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rom[0x8201] ^= 0x32;
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rom[0x8204] ^= 0x32;
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rom[0x8207] ^= 0x32;
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rom[0x8209] ^= 0x32;
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rom[0x820a] ^= 0x32;
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rom[0x820d] ^= 0x32;
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rom[0x820e] ^= 0x32;
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rom[0x8210] ^= 0x32;
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rom[0x8212] ^= 0x32;
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rom[0x8213] ^= 0x32;
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rom[0x8214] ^= 0x32;
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rom[0x8215] ^= 0x32;
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rom[0x8216] ^= 0x32;
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rom[0x8217] ^= 0x32;
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rom[0x8219] ^= 0x32;
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rom[0x821b] ^= 0x32;
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rom[0x821d] ^= 0x32;
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rom[0x821f] ^= 0x32;
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rom[0x8221] ^= 0x32;
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rom[0x8223] ^= 0x32;
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rom[0x8225] ^= 0x32;
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rom[0x8226] ^= 0x32;
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rom[0x8227] ^= 0x32;
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rom[0x822a] ^= 0x32;
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rom[0x822c] ^= 0x32;
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rom[0x822d] ^= 0x32;
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rom[0x8230] ^= 0x32;
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rom[0x8232] ^= 0x32;
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rom[0x8254] ^= 0x32;
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rom[0x8255] ^= 0x32;
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rom[0x8256] ^= 0x32;
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rom[0x8259] ^= 0x32;
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rom[0x825a] ^= 0x32;
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rom[0x825c] ^= 0x32;
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}
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/******************************
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* Graphics ROM decryption *
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******************************/
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@ -6324,7 +6178,6 @@ DRIVER_INIT_MEMBER(funworld_state, rcdino4)
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/* d4-d5 data lines swap, plus a XOR with 0x81, implemented in two steps for an easy view */
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int x;
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UINT8 *src = memregion( "gfx1" )->base();
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for (x = 0x0000; x < 0x10000; x++)
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{
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@ -6334,6 +6187,168 @@ DRIVER_INIT_MEMBER(funworld_state, rcdino4)
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}
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DRIVER_INIT_MEMBER(funworld_state, rcdino4)
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/*****************************************************
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Dino4 hardware with CPU+PLCC daughterboard
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Program ROM data & address lines are swapped.
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GFX ROMs address lines are swapped and data encrypted.
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Color PROM seems straight.
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******************************************************/
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{
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int i, j;
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UINT8 *rom = memregion("maincpu")->base();
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decrypt_rcdino4(rom, memregion("maincpu")->bytes(), memregion("gfx1")->base(), memregion("gfx1")->bytes(), memregion( "gfx1" )->base());
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j = 0;
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for (i = 0x8101; i < 0x8173;)
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{
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rom[i] ^= 0xb8;
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switch (j)
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{
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case 0:
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case 2:
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case 4:
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case 5:
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{
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i += 2;
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break;
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}
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case 1:
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case 3:
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case 6:
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{
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i += 3;
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break;
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}
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default: /* case 7 */
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{
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i += 2;
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j = 0;
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}
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}
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++j;
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}
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/* I could not find any obvious pattern to these */
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rom[0x8174] ^= 0xb8;
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rom[0x8176] ^= 0xb8;
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rom[0x8177] ^= 0xb8;
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rom[0x8179] ^= 0xb8;
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rom[0x817b] ^= 0xb8;
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rom[0x817d] ^= 0xb8;
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rom[0x8180] ^= 0xb8;
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rom[0x8183] ^= 0xb8;
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rom[0x8185] ^= 0xb8;
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rom[0x8187] ^= 0xb8;
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rom[0x818a] ^= 0xb8;
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rom[0x818c] ^= 0xb8;
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rom[0x818f] ^= 0xb8;
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rom[0x8192] ^= 0xb8;
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rom[0x8195] ^= 0xb8;
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rom[0x8198] ^= 0xb8;
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rom[0x819b] ^= 0xb8;
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rom[0x819d] ^= 0xb8;
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rom[0x81a0] ^= 0xb8;
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rom[0x81b2] ^= 0xb8;
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rom[0x81b3] ^= 0xb8;
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rom[0x81b4] ^= 0xb8;
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rom[0x81b5] ^= 0xb8;
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rom[0x81b7] ^= 0xb8;
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rom[0x81b9] ^= 0xb8;
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rom[0x81bb] ^= 0xb8;
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rom[0x81bd] ^= 0xb8;
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rom[0x81bf] ^= 0xb8;
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rom[0x81c1] ^= 0xb8;
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rom[0x81c3] ^= 0xb8;
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rom[0x81c5] ^= 0xb8;
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rom[0x81c7] ^= 0xb8;
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rom[0x81c9] ^= 0xb8;
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rom[0x81cb] ^= 0xb8;
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rom[0x81cd] ^= 0xb8;
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rom[0x81ce] ^= 0xb8;
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rom[0x81d0] ^= 0xb8;
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rom[0x81d2] ^= 0xb8;
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rom[0x81d3] ^= 0xb8;
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rom[0x81d5] ^= 0xb8;
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rom[0x81d6] ^= 0xb8;
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rom[0x81d8] ^= 0xb8;
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rom[0x81db] ^= 0xb8;
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rom[0x81dd] ^= 0xb8;
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rom[0x81df] ^= 0xb8;
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rom[0x81e0] ^= 0xb8;
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rom[0x81e2] ^= 0xb8;
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rom[0x81e5] ^= 0xb8;
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rom[0x81e7] ^= 0xb8;
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rom[0x81ea] ^= 0xb8;
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rom[0x81ec] ^= 0xb8;
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rom[0x81ef] ^= 0xb8;
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rom[0x81f1] ^= 0xb8;
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rom[0x81f4] ^= 0xb8;
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rom[0x81f6] ^= 0xb8;
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rom[0x81f9] ^= 0xb8;
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rom[0x81fb] ^= 0xb8;
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rom[0x81fe] ^= 0xb8;
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rom[0x8201] ^= 0x32;
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rom[0x8204] ^= 0x32;
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rom[0x8207] ^= 0x32;
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rom[0x8209] ^= 0x32;
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rom[0x820a] ^= 0x32;
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rom[0x820d] ^= 0x32;
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rom[0x820e] ^= 0x32;
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rom[0x8210] ^= 0x32;
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rom[0x8212] ^= 0x32;
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rom[0x8213] ^= 0x32;
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rom[0x8214] ^= 0x32;
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rom[0x8215] ^= 0x32;
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rom[0x8216] ^= 0x32;
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rom[0x8217] ^= 0x32;
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rom[0x8219] ^= 0x32;
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rom[0x821b] ^= 0x32;
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rom[0x821d] ^= 0x32;
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rom[0x821f] ^= 0x32;
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rom[0x8221] ^= 0x32;
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rom[0x8223] ^= 0x32;
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rom[0x8225] ^= 0x32;
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rom[0x8226] ^= 0x32;
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rom[0x8227] ^= 0x32;
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rom[0x822a] ^= 0x32;
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rom[0x822c] ^= 0x32;
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rom[0x822d] ^= 0x32;
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rom[0x8230] ^= 0x32;
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rom[0x8232] ^= 0x32;
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rom[0x8254] ^= 0x32;
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rom[0x8255] ^= 0x32;
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rom[0x8256] ^= 0x32;
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rom[0x8259] ^= 0x32;
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rom[0x825a] ^= 0x32;
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rom[0x825c] ^= 0x32;
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}
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DRIVER_INIT_MEMBER(funworld_state, rcdinch)
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/*****************************************************
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Dino4 hardware with CPU+PLCC daughterboard
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Less encryption than rc4dino
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******************************************************/
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{
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decrypt_rcdino4(memregion("maincpu")->base(), memregion("maincpu")->bytes(), memregion("gfx1")->base(), memregion("gfx1")->bytes(), memregion( "gfx1" )->base());
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}
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/**********************************************
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* Game Drivers *
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**********************************************/
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@ -6431,7 +6446,7 @@ GAMEL( 1993, jolycdic, jollycrd, cuoreuno, jolycdic, funworld_state, tabblue,
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// Dino 4 encrypted hardware...
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GAMEL( 1997, pool10e, pool10, cuoreuno, cuoreuno, funworld_state, dino4, ROT0, "C.M.C.", "Pool 10 (Italian, Dino 4 hardware, encrypted)", 0, layout_jollycrd )
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GAME( 1998, rcdino4, 0, cuoreuno, cuoreuno, funworld_state, rcdino4, ROT0, "<unknown>", "unknown encrypted Royal Card (Dino4 HW)", GAME_NOT_WORKING )
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GAMEL( 1998, chinatow, 0, chinatow, chinatow, funworld_state, rcdino4, ROT0, "<unknown>", "China Town (Ver 1B, Dino4 HW)", 0, layout_jollycrd )
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GAMEL( 1998, chinatow, 0, chinatow, chinatow, funworld_state, rcdinch, ROT0, "<unknown>", "China Town (Ver 1B, Dino4 HW)", 0, layout_jollycrd )
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// MCU based games...
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GAME( 199?, mongolnw, 0, royalcd1, royalcrd, funworld_state, mongolnw, ROT0, "<unknown>", "Mongolfier New (Italian)", GAME_UNEMULATED_PROTECTION )
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@ -33,6 +33,7 @@ public:
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DECLARE_DRIVER_INIT(dino4);
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DECLARE_DRIVER_INIT(ctunk);
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DECLARE_DRIVER_INIT(rcdino4);
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DECLARE_DRIVER_INIT(rcdinch);
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TILE_GET_INFO_MEMBER(get_bg_tile_info);
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DECLARE_VIDEO_START(funworld);
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DECLARE_PALETTE_INIT(funworld);
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