diff options
Diffstat (limited to 'src/emu/cpu/ccpu/ccpudasm.c')
-rw-r--r-- | src/emu/cpu/ccpu/ccpudasm.c | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/src/emu/cpu/ccpu/ccpudasm.c b/src/emu/cpu/ccpu/ccpudasm.c new file mode 100644 index 00000000000..c51f2c7ca84 --- /dev/null +++ b/src/emu/cpu/ccpu/ccpudasm.c @@ -0,0 +1,327 @@ +/*************************************************************************** + + ccpudasm.c + Core implementation for the portable Cinematronics CPU disassembler. + + Written by Aaron Giles + Special thanks to Zonn Moore for his detailed documentation. + +***************************************************************************/ + +#include "ccpu.h" + + +offs_t ccpu_dasm(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram) +{ + unsigned startpc = pc; + UINT8 opcode = oprom[pc++ - startpc]; + UINT8 tempval; + + switch (opcode) + { + /* LDAI */ + case 0x00: case 0x01: case 0x02: case 0x03: + case 0x04: case 0x05: case 0x06: case 0x07: + case 0x08: case 0x09: case 0x0a: case 0x0b: + case 0x0c: case 0x0d: case 0x0e: case 0x0f: + sprintf(buffer, "LDAI $%X", opcode & 0x0f); + break; + + /* INP */ + case 0x10: case 0x11: case 0x12: case 0x13: + case 0x14: case 0x15: case 0x16: case 0x17: + case 0x18: case 0x19: case 0x1a: case 0x1b: + case 0x1c: case 0x1d: case 0x1e: case 0x1f: + sprintf(buffer, "INP $%X", opcode & 0x0f); + break; + + /* A8I */ + case 0x20: + sprintf(buffer, "A8I $%X", oprom[pc++ - startpc]); + break; + + /* A4I */ + case 0x21: case 0x22: case 0x23: + case 0x24: case 0x25: case 0x26: case 0x27: + case 0x28: case 0x29: case 0x2a: case 0x2b: + case 0x2c: case 0x2d: case 0x2e: case 0x2f: + sprintf(buffer, "A4I $%X", opcode & 0x0f); + break; + + /* S8I */ + case 0x30: + sprintf(buffer, "S8I $%X", oprom[pc++ - startpc]); + break; + + /* S4I */ + case 0x31: case 0x32: case 0x33: + case 0x34: case 0x35: case 0x36: case 0x37: + case 0x38: case 0x39: case 0x3a: case 0x3b: + case 0x3c: case 0x3d: case 0x3e: case 0x3f: + sprintf(buffer, "S4I $%X", opcode & 0x0f); + break; + + /* LPAI */ + case 0x40: case 0x41: case 0x42: case 0x43: + case 0x44: case 0x45: case 0x46: case 0x47: + case 0x48: case 0x49: case 0x4a: case 0x4b: + case 0x4c: case 0x4d: case 0x4e: case 0x4f: + tempval = oprom[pc++ - startpc]; + sprintf(buffer, "LPAI $%03X", (opcode & 0x0f) + (tempval & 0xf0) + ((tempval & 0x0f) << 8)); + break; + + /* T4K */ + case 0x50: + sprintf(buffer, "T4K"); + break; + + /* JMIB/JEHB */ + case 0x51: + sprintf(buffer, "JMIB/JEHB"); + break; + + /* JVNB */ + case 0x52: + sprintf(buffer, "JVNB"); + break; + + /* JLTB */ + case 0x53: + sprintf(buffer, "JLTB"); + break; + + /* JEQB */ + case 0x54: + sprintf(buffer, "JEQB"); + break; + + /* JCZB */ + case 0x55: + sprintf(buffer, "JCZB"); + break; + + /* JOSB */ + case 0x56: + sprintf(buffer, "JOSB"); + break; + + /* SSA */ + case 0x57: + sprintf(buffer, "SSA"); + break; + + /* JMP */ + case 0x58: + sprintf(buffer, "JMP"); + break; + + /* JMI/JEH */ + case 0x59: + sprintf(buffer, "JMI/JEH"); + break; + + /* JVN */ + case 0x5a: + sprintf(buffer, "JVN"); + break; + + /* JLT */ + case 0x5b: + sprintf(buffer, "JLT"); + break; + + /* JEQ */ + case 0x5c: + sprintf(buffer, "JEQ"); + break; + + /* JCZ */ + case 0x5d: + sprintf(buffer, "JCZ"); + break; + + /* JOS */ + case 0x5e: + sprintf(buffer, "JOS"); + break; + + /* NOP */ + case 0x5f: + sprintf(buffer, "NOP"); + break; + + /* ADD */ + case 0x60: case 0x61: case 0x62: case 0x63: + case 0x64: case 0x65: case 0x66: case 0x67: + case 0x68: case 0x69: case 0x6a: case 0x6b: + case 0x6c: case 0x6d: case 0x6e: case 0x6f: + sprintf(buffer, "ADD $%X", opcode & 0x0f); + break; + + /* SUB n */ + case 0x70: case 0x71: case 0x72: case 0x73: + case 0x74: case 0x75: case 0x76: case 0x77: + case 0x78: case 0x79: case 0x7a: case 0x7b: + case 0x7c: case 0x7d: case 0x7e: case 0x7f: + sprintf(buffer, "SUB $%X", opcode & 0x0f); + break; + + /* SETP n */ + case 0x80: case 0x81: case 0x82: case 0x83: + case 0x84: case 0x85: case 0x86: case 0x87: + case 0x88: case 0x89: case 0x8a: case 0x8b: + case 0x8c: case 0x8d: case 0x8e: case 0x8f: + sprintf(buffer, "SETP $%X", opcode & 0x0f); + break; + + /* OUT */ + case 0x90: case 0x91: case 0x92: case 0x93: + case 0x94: case 0x95: case 0x96: case 0x97: + case 0x98: case 0x99: case 0x9a: case 0x9b: + case 0x9c: case 0x9d: case 0x9e: case 0x9f: + sprintf(buffer, "OUT $%X", opcode & 0x0f); + break; + + /* LDA */ + case 0xa0: case 0xa1: case 0xa2: case 0xa3: + case 0xa4: case 0xa5: case 0xa6: case 0xa7: + case 0xa8: case 0xa9: case 0xaa: case 0xab: + case 0xac: case 0xad: case 0xae: case 0xaf: + sprintf(buffer, "LDA $%X", opcode & 0x0f); + break; + + /* CMP */ + case 0xb0: case 0xb1: case 0xb2: case 0xb3: + case 0xb4: case 0xb5: case 0xb6: case 0xb7: + case 0xb8: case 0xb9: case 0xba: case 0xbb: + case 0xbc: case 0xbd: case 0xbe: case 0xbf: + sprintf(buffer, "TST $%X", opcode & 0x0f); + break; + + /* WS */ + case 0xc0: case 0xc1: case 0xc2: case 0xc3: + case 0xc4: case 0xc5: case 0xc6: case 0xc7: + case 0xc8: case 0xc9: case 0xca: case 0xcb: + case 0xcc: case 0xcd: case 0xce: case 0xcf: + sprintf(buffer, "WS $%X", opcode & 0x0f); + break; + + /* STA n */ + case 0xd0: case 0xd1: case 0xd2: case 0xd3: + case 0xd4: case 0xd5: case 0xd6: case 0xd7: + case 0xd8: case 0xd9: case 0xda: case 0xdb: + case 0xdc: case 0xdd: case 0xde: case 0xdf: + sprintf(buffer, "STA $%X", opcode & 0x0f); + break; + + /* DV */ + case 0xe0: + sprintf(buffer, "DV"); + break; + + /* LPAP */ + case 0xe1: + sprintf(buffer, "LPAP"); + break; + + /* WSP */ + case 0xf1: + sprintf(buffer, "WSP"); + break; + + /* LKP */ + case 0xe2: + case 0xf2: + sprintf(buffer, "LKP"); + break; + + /* MUL */ + case 0xe3: + case 0xf3: + sprintf(buffer, "MUL"); + break; + + /* NV */ + case 0xe4: + case 0xf4: + sprintf(buffer, "NV"); + break; + + /* FRM */ + case 0xe5: + case 0xf5: + sprintf(buffer, "FRM"); + break; + + /* STAP */ + case 0xe6: + case 0xf6: + sprintf(buffer, "STAP"); + break; + + /* CST */ + case 0xf7: + sprintf(buffer, "CST"); + break; + + /* ADDP */ + case 0xe7: + sprintf(buffer, "ADDP"); + break; + + /* SUBP */ + case 0xe8: + case 0xf8: + sprintf(buffer, "SUBP"); + break; + + /* ANDP */ + case 0xe9: + case 0xf9: + sprintf(buffer, "ANDP"); + break; + + /* LDAP */ + case 0xea: + case 0xfa: + sprintf(buffer, "LDAP"); + break; + + /* SHR */ + case 0xeb: + case 0xfb: + sprintf(buffer, "SHR"); + break; + + /* SHL */ + case 0xec: + case 0xfc: + sprintf(buffer, "SHL"); + break; + + /* ASR */ + case 0xed: + case 0xfd: + sprintf(buffer, "ASR"); + break; + + /* SHRB */ + case 0xee: + case 0xfe: + sprintf(buffer, "SHRB"); + break; + + /* SHLB */ + case 0xef: + case 0xff: + sprintf(buffer, "SHLB"); + break; + + /* IV */ + case 0xf0: + sprintf(buffer, "IV"); + break; + } + + return (pc - startpc) | DASMFLAG_SUPPORTED; +} |