diff options
Diffstat (limited to 'src/mame/machine/cclimber.c')
-rw-r--r-- | src/mame/machine/cclimber.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/src/mame/machine/cclimber.c b/src/mame/machine/cclimber.c new file mode 100644 index 00000000000..24fce0fb794 --- /dev/null +++ b/src/mame/machine/cclimber.c @@ -0,0 +1,142 @@ +#include "driver.h" +#include "includes/cclimber.h" + +/* set to 1 to fix protection check after bonus round (see notes in pacman.c driver) */ +#define CANNONB_HACK 0 + +static void cclimber_decode(const UINT8 convtable[8][16]) +{ + UINT8 *rom = memory_region(REGION_CPU1); + UINT8 *decrypt = auto_malloc(0x10000); + int A; + + memory_set_decrypted_region(0, 0x0000, 0xffff, decrypt); + + for (A = 0x0000;A < 0x10000;A++) + { + int i,j; + UINT8 src; + + + src = rom[A]; + + /* pick the translation table from bit 0 of the address */ + /* and from bits 1 7 of the source data */ + i = (A & 1) | (src & 0x02) | ((src & 0x80) >> 5); + + /* pick the offset in the table from bits 0 2 4 6 of the source data */ + j = (src & 0x01) | ((src & 0x04) >> 1) | ((src & 0x10) >> 2) | ((src & 0x40) >> 3); + + /* decode the opcodes */ + decrypt[A] = (src & 0xaa) | convtable[i][j]; + } +} + +DRIVER_INIT( cclimber ) +{ + static const UINT8 convtable[8][16] = + { + /* -1 marks spots which are unused and therefore unknown */ + { 0x44,0x14,0x54,0x10,0x11,0x41,0x05,0x50,0x51,0x00,0x40,0x55,0x45,0x04,0x01,0x15 }, + { 0x44,0x10,0x15,0x55,0x00,0x41,0x40,0x51,0x14,0x45,0x11,0x50,0x01,0x54,0x04,0x05 }, + { 0x45,0x10,0x11,0x44,0x05,0x50,0x51,0x04,0x41,0x14,0x15,0x40,0x01,0x54,0x55,0x00 }, + { 0x04,0x51,0x45,0x00,0x44,0x10, -1,0x55,0x11,0x54,0x50,0x40,0x05, -1,0x14,0x01 }, + { 0x54,0x51,0x15,0x45,0x44,0x01,0x11,0x41,0x04,0x55,0x50, -1,0x00,0x10,0x40, -1 }, + { -1,0x54,0x14,0x50,0x51,0x01, -1,0x40,0x41,0x10,0x00,0x55,0x05,0x44,0x11,0x45 }, + { 0x51,0x04,0x10, -1,0x50,0x40,0x00, -1,0x41,0x01,0x05,0x15,0x11,0x14,0x44,0x54 }, + { -1, -1,0x54,0x01,0x15,0x40,0x45,0x41,0x51,0x04,0x50,0x05,0x11,0x44,0x10,0x14 } + }; + + cclimber_decode(convtable); +} + +DRIVER_INIT( cclimbrj ) +{ + static const UINT8 convtable[8][16] = + { + { 0x41,0x54,0x51,0x14,0x05,0x10,0x01,0x55,0x44,0x11,0x00,0x50,0x15,0x40,0x04,0x45 }, + { 0x50,0x11,0x40,0x55,0x51,0x14,0x45,0x04,0x54,0x15,0x10,0x05,0x44,0x01,0x00,0x41 }, + { 0x44,0x11,0x00,0x50,0x41,0x54,0x04,0x14,0x15,0x40,0x51,0x55,0x05,0x10,0x01,0x45 }, + { 0x10,0x50,0x54,0x55,0x01,0x44,0x40,0x04,0x14,0x11,0x00,0x41,0x45,0x15,0x51,0x05 }, + { 0x14,0x41,0x01,0x44,0x04,0x50,0x51,0x45,0x11,0x40,0x54,0x15,0x10,0x00,0x55,0x05 }, + { 0x01,0x05,0x41,0x45,0x54,0x50,0x55,0x10,0x11,0x15,0x51,0x14,0x44,0x40,0x04,0x00 }, + { 0x05,0x55,0x00,0x50,0x11,0x40,0x54,0x14,0x45,0x51,0x10,0x04,0x44,0x01,0x41,0x15 }, + { 0x55,0x50,0x15,0x10,0x01,0x04,0x41,0x44,0x45,0x40,0x05,0x00,0x11,0x14,0x51,0x54 }, + }; + + cclimber_decode(convtable); +} + +DRIVER_INIT( mshuttle ) +{ + static const UINT8 convtable[8][16] = + { + /* -1 marks spots which are unused and therefore unknown */ + { 0x40,0x41,0x44,0x15,0x05,0x51,0x54,0x55,0x50,0x00,0x01,0x04, -1,0x10,0x11,0x14 }, + { 0x45,0x51,0x55,0x44,0x40,0x11,0x05,0x41,0x10,0x14,0x54,0x50,0x15,0x04,0x00,0x01 }, + { 0x11,0x14,0x10,0x00,0x44,0x05, -1,0x04,0x45,0x15,0x55,0x50, -1,0x01,0x54,0x51 }, + { 0x14,0x01,0x11,0x10,0x50,0x15,0x00,0x40,0x04,0x51,0x45,0x05,0x55,0x54, -1,0x44 }, + { 0x04,0x10, -1,0x40,0x15,0x41,0x50,0x50,0x11, -1,0x14,0x00,0x51,0x45,0x55,0x01 }, + { 0x44,0x45,0x00,0x51, -1, -1,0x15,0x11,0x01,0x10,0x04,0x55,0x05,0x40,0x50,0x41 }, + { 0x51,0x00,0x01,0x05,0x04,0x55,0x54,0x50,0x41, -1,0x11,0x15,0x14,0x10,0x44,0x40 }, + { 0x05,0x04,0x51,0x01, -1, -1,0x55, -1,0x00,0x50,0x15,0x14,0x44,0x41,0x40,0x54 }, + }; + + cclimber_decode(convtable); +} + +DRIVER_INIT( ckongb ) +{ + int A; + UINT8 *rom = memory_region(REGION_CPU1); + + for (A = 0x0000;A < 0x6000;A++) /* all the program ROMs are encrypted */ + { + rom[A] = rom[A] ^ 0xf0; + } +} + +#if CANNONB_HACK +static void cannonb_patch(void) +{ + UINT8 *rom = memory_region(REGION_CPU1); + + rom[0x2ba0] = 0x21; + rom[0x2ba1] = 0xfb; + rom[0x2ba2] = 0x0e; + rom[0x2ba3] = 0x00; +} +#endif + +DRIVER_INIT( cannonb ) +{ + int A; + UINT8 *rom = memory_region(REGION_CPU1); + + for (A = 0x0000;A < 0x1000;A++) /* only first ROM is encrypted */ + { + UINT8 src; + int i; + static const UINT8 xor_tab[4] ={0x92, 0x82, 0x12, 0x10}; + + src = rom[A+0x10000]; + + i = ((A&0x200)>>8) | ((A&0x80)>>7); + + src ^= xor_tab[i]; + + rom[A] = src; + } + +#if CANNONB_HACK + cannonb_patch(); +#endif +} + +DRIVER_INIT( cannonb2 ) +{ +#if CANNONB_HACK + cannonb_patch(); +#endif +} + |