// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** ccpudasm.c Core implementation for the portable Cinematronics CPU disassembler. Written by Aaron Giles Special thanks to Zonn Moore for his detailed documentation. ***************************************************************************/ #include "emu.h" #include "ccpu.h" CPU_DISASSEMBLE( ccpu ) { 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; }