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Diffstat (limited to 'trunk/src/emu/cpu/pps4/pps4dasm.c')
-rw-r--r--trunk/src/emu/cpu/pps4/pps4dasm.c135
1 files changed, 135 insertions, 0 deletions
diff --git a/trunk/src/emu/cpu/pps4/pps4dasm.c b/trunk/src/emu/cpu/pps4/pps4dasm.c
new file mode 100644
index 00000000000..51bdd5211c2
--- /dev/null
+++ b/trunk/src/emu/cpu/pps4/pps4dasm.c
@@ -0,0 +1,135 @@
+/*****************************************************************************
+ *
+ * pps4dasm.c
+ *
+ * Rockwell PPS-4 CPU Disassembly
+ *
+ * Initial version by Miodrag Milanovic
+ *
+ *****************************************************************************/
+
+#include "emu.h"
+
+#define OP(A) oprom[(A) - PC]
+#define ARG(A) opram[(A) - PC]
+
+CPU_DISASSEMBLE( pps4 )
+{
+ UINT32 flags = 0;
+ unsigned PC = pc;
+ UINT8 op;
+ switch (op = OP(pc++))
+ {
+ // Arithmetic instructions
+ case 0x0b: sprintf (buffer,"ad"); break;
+ case 0x0a: sprintf (buffer,"adc"); break;
+ case 0x09: sprintf (buffer,"adsk"); break;
+ case 0x08: sprintf (buffer,"adcsk"); break;
+ case 0x60: case 0x61: case 0x62: case 0x63:
+ case 0x64: case 0x66: case 0x67: case 0x68:
+ case 0x69: case 0x6a: case 0x6b: case 0x6c:
+ case 0x6d: case 0x6e:
+ sprintf (buffer,"adi %01x",(op & 0x0f)); break;
+ case 0x65: sprintf (buffer,"dc"); break;
+ // Logical instructions
+ case 0x0d: sprintf (buffer,"and"); break;
+ case 0x0f: sprintf (buffer,"or"); break;
+ case 0x0c: sprintf (buffer,"eor"); break;
+ case 0x0e: sprintf (buffer,"comp"); break;
+ // Data transfer instructions
+ case 0x20: sprintf (buffer,"sc"); break;
+ case 0x24: sprintf (buffer,"rc"); break;
+ case 0x22: sprintf (buffer,"sf1"); break;
+ case 0x26: sprintf (buffer,"rf1"); break;
+ case 0x21: sprintf (buffer,"sf2"); break;
+ case 0x25: sprintf (buffer,"rf2"); break;
+ case 0x30: case 0x31: case 0x32: case 0x33:
+ case 0x34: case 0x35: case 0x36: case 0x37:
+ sprintf (buffer,"ld %01x",(op & 0x07)); break;
+ case 0x38: case 0x39: case 0x3a: case 0x3b:
+ case 0x3c: case 0x3d: case 0x3e: case 0x3f:
+ sprintf (buffer,"ex %01x",(op & 0x07)); break;
+ case 0x28: case 0x29: case 0x2a: case 0x2b:
+ case 0x2c: case 0x2d: case 0x2e: case 0x2f:
+ sprintf (buffer,"exd %01x",(op & 0x07)); break;
+ case 0x70: case 0x71: case 0x72: case 0x73:
+ case 0x74: case 0x75: case 0x76: case 0x77:
+ sprintf (buffer,"ldi %01x",(op & 0x0f)); break;
+ case 0x12: sprintf (buffer,"lax"); break;
+ case 0x1b: sprintf (buffer,"lxa"); break;
+ case 0x11: sprintf (buffer,"labl"); break;
+ case 0x10: sprintf (buffer,"lbmx"); break;
+ case 0x04: sprintf (buffer,"lbua"); break;
+ case 0x19: sprintf (buffer,"xabl"); break;
+ case 0x18: sprintf (buffer,"xbmx"); break;
+ case 0x1a: sprintf (buffer,"xax"); break;
+ case 0x06: sprintf (buffer,"xs"); break;
+ case 0x6f: sprintf (buffer,"cys"); break;
+ 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,"lb %02x",ARG(pc)); pc++; break;
+ case 0x00: sprintf (buffer,"lbl %02x",ARG(pc)); pc++; break;
+ case 0x17: sprintf (buffer,"incb"); break;
+ case 0x1f: sprintf (buffer,"decb"); break;
+ // Control transfer instructions
+ 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:
+ 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:
+ 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:
+ 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,"t %02x",(op & 0x3f)); break;
+ 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:
+ case 0xe0: case 0xe1: case 0xe2: case 0xe3:
+ case 0xe4: case 0xe5: case 0xe6: case 0xe7:
+ case 0xe8: case 0xe9: case 0xea: case 0xeb:
+ case 0xec: case 0xed: case 0xee: case 0xef:
+ case 0xf0: case 0xf1: case 0xf2: case 0xf3:
+ case 0xf4: case 0xf5: case 0xf6: case 0xf7:
+ case 0xf8: case 0xf9: case 0xfa: case 0xfb:
+ case 0xfc: case 0xfd: case 0xfe: case 0xff:
+ sprintf (buffer,"tm %02x %02x",(op & 0x3f),ARG(pc)); pc++; break;
+ case 0x50: case 0x51: case 0x52: case 0x53:
+ case 0x54: case 0x55: case 0x56: case 0x57:
+ case 0x58: case 0x59: case 0x5a: case 0x5b:
+ case 0x5c: case 0x5d: case 0x5e: case 0x5f:
+ sprintf (buffer,"tl %01x %02x",(op & 0x0f),ARG(pc)); pc++; break;
+ case 0x01: case 0x02: case 0x03:
+ sprintf (buffer,"tml %02x",ARG(pc)); pc++; break;
+ case 0x15: sprintf (buffer,"skc"); break;
+ case 0x1e: sprintf (buffer,"skz"); break;
+ 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:
+ sprintf (buffer,"skbi %01x",(op & 0x0f)); break;
+ case 0x16: sprintf (buffer,"skf1"); break;
+ case 0x14: sprintf (buffer,"skf2"); break;
+ case 0x05: sprintf (buffer,"rtn"); break;
+ case 0x07: sprintf (buffer,"rtnsk"); break;
+ // Input/Output instructions
+ case 0x1c: sprintf (buffer,"iol %02x",ARG(pc)); pc++; break;
+ case 0x27: sprintf (buffer,"dia"); break;
+ case 0x23: sprintf (buffer,"dib"); break;
+ case 0x1d: sprintf (buffer,"doa"); break;
+ // Special instructions
+ case 0x13: sprintf (buffer,"sag"); break;
+ }
+
+ return (pc - PC) | flags | DASMFLAG_SUPPORTED;
+}