> -----Original Message-----
> From: owner-stella@xxxxxxxxxxx [mailto:owner-stella@xxxxxxxxxxx]On
> Behalf Of Eckhard Stolberg
> Sent: Wednesday, July 08, 1998 11:59 AM
> To: stella@xxxxxxxxxxx
> Subject: RE: [stella] A new version of an old assembler.
>
> If you can't distribute a modified DASM, would it be possible to
> post the altered processor definiton code, so that other can compile
> their own improver version of it. I suppose that was the only part,
> that needed to be modified to get the undocumented opcodes done, right?
Well, I guess it's O.K. to republish a small excerpt ;-)
I also had to comment out a variable called _fmode in main.c. I'm not sure
why, but things seemed to work O.K. without it. Maybe your compiler won't
complain about it.
If you try to assemble undoc.asm with DASM, be sure to add an org statement.
DASM needs one.
This version of mne6502.c is slightly different than one I've already sent
to Bob Colbert. I made some more slight modifications to bring it into
compliance with what Distella would output if it were modified to treat the
undocumented instructions as code instead of data. I think all you would
need to do to Distella is to remove the leading dots from the undocumented
opcodes in table.c. But I haven't tried it. Any volunteers to get Distella
to disassemble the undocumented opcodes?
Of course Bob is still more than welcome to include this file in the
official release of DASM.
John
/* #include "asm.h" */
#define ASTD AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX|\
AF_WORDADRY|AF_INDBYTEX|AF_INDBYTEY
MNE Mne6502[] = {
{ NULL, v_mnemonic, "adc", 0, AF_IMM8|ASTD, { 0x69, 0x65, 0x75, 0x6D, 0x7D, 0x79, 0x61, 0x71 } },
{ NULL, v_mnemonic, "anc", 0, AF_IMM8, { 0x0b } },
{ NULL, v_mnemonic, "and", 0, AF_IMM8|ASTD, { 0x29, 0x25, 0x35, 0x2D, 0x3D, 0x39, 0x21, 0x31 } },
{ NULL, v_mnemonic, "ane", 0, AF_IMM8, { 0x8b } },
{ NULL, v_mnemonic, "arr", 0, AF_IMM8, { 0x6b } },
{ NULL, v_mnemonic, "asl", 0, AF_IMP|AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX, { 0x0A, 0x06, 0x16, 0x0E, 0x1E } },
{ NULL, v_mnemonic, "asr", 0, AF_IMM8, { 0x4b } },
{ NULL, v_mnemonic, "bcc", 0, AF_REL, { 0x90 } },
{ NULL, v_mnemonic, "bcs", 0, AF_REL, { 0xB0 } },
{ NULL, v_mnemonic, "beq", 0, AF_REL, { 0xF0 } },
{ NULL, v_mnemonic, "bit", 0, AF_BYTEADR|AF_WORDADR, { 0x24, 0x2C } },
{ NULL, v_mnemonic, "bmi", 0, AF_REL, { 0x30 } },
{ NULL, v_mnemonic, "bne", 0, AF_REL, { 0xD0 } },
{ NULL, v_mnemonic, "bpl", 0, AF_REL, { 0x10 } },
{ NULL, v_mnemonic, "brk", 0, AF_IMP, { 0x00 } },
{ NULL, v_mnemonic, "bvc", 0, AF_REL, { 0x50 } },
{ NULL, v_mnemonic, "bvs", 0, AF_REL, { 0x70 } },
{ NULL, v_mnemonic, "clc", 0, AF_IMP, { 0x18 } },
{ NULL, v_mnemonic, "cld", 0, AF_IMP, { 0xD8 } },
{ NULL, v_mnemonic, "cli", 0, AF_IMP, { 0x58 } },
{ NULL, v_mnemonic, "clv", 0, AF_IMP, { 0xB8 } },
{ NULL, v_mnemonic, "cmp", 0, AF_IMM8|ASTD, { 0xC9, 0xC5, 0xD5, 0xCD, 0xDD, 0xD9, 0xC1, 0xD1 } },
{ NULL, v_mnemonic, "cpx", 0, AF_IMM8|AF_BYTEADR|AF_WORDADR, { 0xE0, 0xE4, 0xEC } },
{ NULL, v_mnemonic, "cpy", 0, AF_IMM8|AF_BYTEADR|AF_WORDADR, { 0xC0, 0xC4, 0xCC } },
{ NULL, v_mnemonic, "dcp", 0, AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX|AF_WORDADRY|AF_INDBYTEX|AF_INDBYTEY, { 0xc7, 0xd7, 0xcf, 0xdf, 0xdb, 0xc3, 0xd3 } },
{ NULL, v_mnemonic, "dec", 0, AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX, { 0xC6, 0xD6, 0xCE, 0xDE } },
{ NULL, v_mnemonic, "dex", 0, AF_IMP, { 0xCA } },
{ NULL, v_mnemonic, "dey", 0, AF_IMP, { 0x88 } },
{ NULL, v_mnemonic, "eor", 0, AF_IMM8|ASTD, { 0x49, 0x45, 0x55, 0x4D, 0x5D, 0x59, 0x41,0x51 } },
{ NULL, v_mnemonic, "inc", 0, AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX, { 0xE6, 0xF6, 0xEE, 0xFE } },
{ NULL, v_mnemonic, "inx", 0, AF_IMP, { 0xE8 } },
{ NULL, v_mnemonic, "iny", 0, AF_IMP, { 0xC8 } },
{ NULL, v_mnemonic, "jam", 0, AF_IMP, { 0x02 } },
{ NULL, v_mnemonic, "isb", 0, AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX|AF_WORDADRY|AF_INDBYTEX|AF_INDBYTEY, { 0xe7, 0xf7, 0xef, 0xff, 0xfb, 0xe3, 0xf3 } },
{ NULL, v_mnemonic, "jmp", 0, AF_WORDADR|AF_INDWORD, { 0x4C, 0x6C } },
{ NULL, v_mnemonic, "jsr", 0, AF_WORDADR, { 0x20 } },
{ NULL, v_mnemonic, "las", 0, AF_WORDADRY, { 0xbb } },
{ NULL, v_mnemonic, "lax", 0, AF_BYTEADR|AF_BYTEADRY|AF_WORDADR|AF_WORDADRY|AF_INDBYTEX|AF_INDBYTEY, { 0xa7, 0xb7, 0xaf, 0xbf, 0xa3, 0xb3 } },
{ NULL, v_mnemonic, "lda", 0, AF_IMM8|ASTD, { 0xA9, 0xA5, 0xB5, 0xAD, 0xBD, 0xB9, 0xA1, 0xB1 } },
{ NULL, v_mnemonic, "ldx", 0, AF_IMM8|AF_BYTEADR|AF_BYTEADRY|AF_WORDADR|AF_WORDADRY, { 0xA2, 0xA6, 0xB6, 0xAE, 0xBE } },
{ NULL, v_mnemonic, "ldy", 0, AF_IMM8|AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX, { 0xA0, 0xA4, 0xB4, 0xAC, 0xBC } },
{ NULL, v_mnemonic, "lsr", 0, AF_IMP|AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX, { 0x4A, 0x46, 0x56, 0x4E, 0x5E } },
{ NULL, v_mnemonic, "lxa", 0, AF_IMM8, { 0xab } },
{ NULL, v_mnemonic, "noop", 0, AF_IMM8|AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX, { 0x80, 0x04, 0x14, 0x0c, 0x1c } },
{ NULL, v_mnemonic, "nop", 0, AF_IMP, { 0xEA } },
{ NULL, v_mnemonic, "ora", 0, AF_IMM8|ASTD, { 0x09, 0x05, 0x15, 0x0D, 0x1D, 0x19, 0x01, 0x11 } },
{ NULL, v_mnemonic, "pha", 0, AF_IMP, { 0x48 } },
{ NULL, v_mnemonic, "php", 0, AF_IMP, { 0x08 } },
{ NULL, v_mnemonic, "pla", 0, AF_IMP, { 0x68 } },
{ NULL, v_mnemonic, "plp", 0, AF_IMP, { 0x28 } },
{ NULL, v_mnemonic, "rla", 0, AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX|AF_WORDADRY|AF_INDBYTEX|AF_INDBYTEY, { 0x27, 0x37, 0x2f, 0x3f, 0x3b, 0x23, 0x33 } },
{ NULL, v_mnemonic, "rol", 0, AF_IMP|AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX, { 0x2A, 0x26, 0x36, 0x2E, 0x3E } },
{ NULL, v_mnemonic, "ror", 0, AF_IMP|AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX, { 0x6A, 0x66, 0x76, 0x6E, 0x7E } },
{ NULL, v_mnemonic, "rra", 0, AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX|AF_WORDADRY|AF_INDBYTEX|AF_INDBYTEY, { 0x67, 0x77, 0x6f, 0x7f, 0x7b, 0x63, 0x73 } },
{ NULL, v_mnemonic, "rti", 0, AF_IMP, { 0x40 } },
{ NULL, v_mnemonic, "rts", 0, AF_IMP, { 0x60 } },
{ NULL, v_mnemonic, "sax", 0, AF_BYTEADR|AF_BYTEADRY|AF_WORDADR|AF_INDBYTEX, { 0x87, 0x97, 0x8f, 0x83 } },
{ NULL, v_mnemonic, "sbc", 0, AF_IMM8|ASTD, { 0xE9, 0xE5, 0xF5, 0xED, 0xFD, 0xF9, 0xE1, 0xF1 } },
{ NULL, v_mnemonic, "sbx", 0, AF_IMM8, { 0xcb } },
{ NULL, v_mnemonic, "sec", 0, AF_IMP, { 0x38 } },
{ NULL, v_mnemonic, "sed", 0, AF_IMP, { 0xF8 } },
{ NULL, v_mnemonic, "sei", 0, AF_IMP, { 0x78 } },
{ NULL, v_mnemonic, "sha", 0, AF_WORDADRY|AF_INDBYTEY, { 0x9f, 0x93 } },
{ NULL, v_mnemonic, "shs", 0, AF_WORDADRY, { 0x9b } },
{ NULL, v_mnemonic, "shx", 0, AF_WORDADRY, { 0x9e } },
{ NULL, v_mnemonic, "shy", 0, AF_WORDADRX, { 0x9c } },
{ NULL, v_mnemonic, "slo", 0, AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX|AF_WORDADRY|AF_INDBYTEX|AF_INDBYTEY, { 0x07, 0x17, 0x0f, 0x1f, 0x1b, 0x03, 0x13 } },
{ NULL, v_mnemonic, "sre", 0, AF_BYTEADR|AF_BYTEADRX|AF_WORDADR|AF_WORDADRX|AF_WORDADRY|AF_INDBYTEX|AF_INDBYTEY, { 0x47, 0x57, 0x4f, 0x5f, 0x5b, 0x43, 0x53 } },
{ NULL, v_mnemonic, "sta", 0, ASTD, { 0x85, 0x95, 0x8D, 0x9D, 0x99, 0x81, 0x91 } },
{ NULL, v_mnemonic, "stx", 0, AF_BYTEADR|AF_BYTEADRY|AF_WORDADR, { 0x86, 0x96, 0x8E } },
{ NULL, v_mnemonic, "sty", 0, AF_BYTEADR|AF_BYTEADRX|AF_WORDADR, { 0x84, 0x94, 0x8C } },
{ NULL, v_mnemonic, "tax", 0, AF_IMP, { 0xAA } },
{ NULL, v_mnemonic, "tay", 0, AF_IMP, { 0xA8 } },
{ NULL, v_mnemonic, "tsx", 0, AF_IMP, { 0xBA } },
{ NULL, v_mnemonic, "txa", 0, AF_IMP, { 0x8A } },
{ NULL, v_mnemonic, "txs", 0, AF_IMP, { 0x9A } },
{ NULL, v_mnemonic, "tya", 0, AF_IMP, { 0x98 } },
{ NULL, v_mnemonic, "usbc", 0, AF_IMM8, { 0xeb } },
{ NULL, }
};
