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Forums > C64 Coding > Addressing with values in zeropages
2009-11-04 22:02
8bitforever
Account closed

Registered: Oct 2009
Posts: 48
Addressing with values in zeropages

Addressing with values in zeropages.

I need to do a lot of coding to solve an addressing problem that I think is actually simple.
I want to take the values from two zeropages and combine them into an address.

Example:
Lets say that zeropages fb and fa contain the values hex 20 and hex 40.

$fb = hex 20
$fa = hex 40

The goal now is to combine them so they can be used in addressing like below.
lda $2040,x
Is this possible ?

Writing
lda $fb$fa,x
is not possible :-).

The question is how to pull the values out and use them in addressing ?
2009-11-04 22:14
WVL

Registered: Mar 2002
Posts: 902
it only works with y

$fb = #$00
$fc = #$10

ldy #0
lda ($fb),y == lda $1000,y
2009-11-04 22:15
Pantaloon

Registered: Aug 2003
Posts: 124
Panta here, i will give you a smash in the face if you post here agsin. i know you are a trolling bitch but if you ever get revealed you know what...
2009-11-04 22:38
8bitforever
Account closed

Registered: Oct 2009
Posts: 48
Thanks WVL, that made my life easier :-)
2009-11-04 22:41
Frantic

Registered: Mar 2003
Posts: 1648
@8bit: At least read the introductory chapters of any book on assembler coding before you run into forums asking for every silly little detail, or else.. what Pantaloon says! You know, reading just a little will actually save you (and US) time.

Relevant books are available here:

http://codebase64.org/doku.php?id=books:start
http://www.bombjack.org/commodore/

Good bye!
2009-11-05 09:31
Skate

Registered: Jul 2003
Posts: 494
Be careful dudes, don't criticize 8bitforever or Oswald strikes! ;)
2010-01-31 12:14
White Flame

Registered: Sep 2002
Posts: 136
If you don't need to have an additional offset to the 16-bit address in zp, you can use .X:

ldx #$00
lda ($fa,x)

This form is good for having arrays of pointers in zeropage (where .X is a multiple of 2), but obviously can consume your valuable zp space pretty quickly.
2010-01-31 14:23
Ventura
Account closed

Registered: Jan 2006
Posts: 67
? As in: Huh!? Pick up a manual first. Waste of space. Gee, thanks WVL/White-Flamer i'm a lamer!.
2010-01-31 17:35
Ventura
Account closed

Registered: Jan 2006
Posts: 67
#define OPCODE_ILLEGAL 0x8000 // illegal opcode, unpredictable behaviour
#define OPCODE_NOPARAM 0x4000 // single byte operand, takes no parameters
#define OPCODE_IMM8 0x2000 // load a 8bit value
#define OPCODE_POINTER 0x1000 // load a pointer for adressing
#define OPCODE_MEM8 0x0800 // use 8 bit adressing
#define OPCODE_MEM16 0x0400 // use 16 bit adressing
#define OPCODE_X 0x0200 // mem indexing uses x
#define OPCODE_Y 0x0100 // mem indexing uses y
#define OPCODE_BRANCH8 0x0080 // branch to offset
#define OPCODE_ZEROPAGE OPCODE_POINTER | OPCODE_MEM8 // load from zeropage
#define OPCODE_WORDPTR OPCODE_POINTER | OPCODE_MEM16 // load from 16bit adress

struct {
const char* name;
unsigned char opcode;
unsigned char size_t;
unsigned int param;
} X6510_mnemonics[] = {
{ "brk", 0x00, 1, OPCODE_NOPARAM } ,
{ "ora", 0x01, 2, OPCODE_ZEROPAGE | OPCODE_X } , // ora ($..,x)
{ "jam", 0x02, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM, } ,
{ "slo", 0x03, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_X, } , // slo ($..,x)
{ "nop", 0x04, 2, OPCODE_ILLEGAL | OPCODE_MEM8, } , // nop $..
{ "ora", 0x05, 2, OPCODE_MEM8, } , // ora $..
{ "asl", 0x06, 2, OPCODE_MEM8, } , // asl $..
{ "slo", 0x07, 2, OPCODE_ILLEGAL | OPCODE_MEM8, } , // slo $..
{ "php", 0x08, 1, OPCODE_NOPARAM, } ,
{ "ora", 0x09, 2, OPCODE_IMM8, } , // ora #$..
{ "asl", 0x0a, 1, OPCODE_NOPARAM, } ,
{ "anc", 0x0b, 2, OPCODE_ILLEGAL | OPCODE_IMM8, } , // anc #$..
{ "nop", 0x0c, 3, OPCODE_ILLEGAL | OPCODE_MEM16, } , // nop $....
{ "ora", 0x0d, 3, OPCODE_MEM16, } , // ora $....
{ "asl", 0x0e, 3, OPCODE_MEM16, } , // asl $....
{ "slo", 0x0f, 3, OPCODE_ILLEGAL | OPCODE_MEM16, } , //slo $....
{ "bpl", 0x10, 2, OPCODE_BRANCH8, } , // bpl $offset
{ "ora", 0x11, 2, OPCODE_ZEROPAGE | OPCODE_Y, } , // ora ($..),y
{ "jam", 0x12, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM, } ,
{ "slo", 0x13, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_Y, } , // slo ($..),y
{ "nop", 0x14, 2, OPCODE_ILLEGAL | OPCODE_MEM8 | OPCODE_X, } , // nop $..,x
{ "ora", 0x15, 2, OPCODE_MEM8 | OPCODE_X, } , // ora $..,x
{ "asl", 0x16, 2, OPCODE_MEM8 | OPCODE_X, } , // asl $..,x
{ "slo", 0x17, 2, OPCODE_ILLEGAL | OPCODE_MEM8 | OPCODE_X, } , // slo $..,x
{ "clc", 0x18, 1, OPCODE_NOPARAM, } ,
{ "ora", 0x19, 3, OPCODE_MEM16 | OPCODE_Y, } , // ora $....,y
{ "nop", 0x1a, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM, } ,
{ "slo", 0x1b, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_Y, } , // slo $....,y
{ "nop", 0x1c, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_X, } , // nop $....,x
{ "ora", 0x1d, 3, OPCODE_MEM16 | OPCODE_X, } , // ora $....,x
{ "asl", 0x1e, 3, OPCODE_MEM16 | OPCODE_X, } , // asl $....,x
{ "slo", 0x1f, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_X, } , // slo $....,x
{ "jsr", 0x20, 3, OPCODE_MEM16, } , // jsr $....
{ "and", 0x21, 2, OPCODE_ZEROPAGE | OPCODE_X, } , // and ($..,x)
{ "jam", 0x22, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM, } ,
{ "rla", 0x23, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_X, } , // rla ($..,x)
{ "bit", 0x24, 2, OPCODE_MEM8, } , // bit $..
{ "and", 0x25, 2, OPCODE_MEM8, } , // and $..
{ "rol", 0x26, 2, OPCODE_MEM8, } , // rol $..
{ "rla", 0x27, 2, OPCODE_ILLEGAL | OPCODE_MEM8, } , // rla $..
{ "plp", 0x28, 1, OPCODE_NOPARAM, } ,
{ "and", 0x29, 2, OPCODE_IMM8, } , // and #$..
{ "rol", 0x2a, 2, OPCODE_NOPARAM, } ,
{ "anc", 0x2b, 2, OPCODE_ILLEGAL | OPCODE_IMM8, } , // anc #$..
{ "bit", 0x2c, 3, OPCODE_MEM16, } , // bit $....
{ "and", 0x2d, 3, OPCODE_MEM16, } , // and $....
{ "rol", 0x2e, 3, OPCODE_MEM16, } , // rol $....
{ "rla", 0x2f, 3, OPCODE_ILLEGAL | OPCODE_MEM16, } , // rla $....
{ "bmi", 0x30, 2, OPCODE_BRANCH8, } , // bmi $....
{ "and", 0x31, 2, OPCODE_ZEROPAGE | OPCODE_Y, } , // and ($..),y
{ "jam", 0x32, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM, } ,
{ "rla", 0x33, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_Y, } , // rla ($..),y
{ "nop", 0x34, 2, OPCODE_ILLEGAL | OPCODE_MEM8 | OPCODE_X, } , // nop $..,x
{ "and", 0x35, 2, OPCODE_MEM8 | OPCODE_X, } , // and $..,x
{ "rol", 0x36, 2, OPCODE_MEM8 | OPCODE_X, } , // rol $..,x
{ "rla", 0x37, 2, OPCODE_ILLEGAL | OPCODE_MEM8 | OPCODE_X, } , // rla $..,x
{ "sec", 0x38, 1, OPCODE_NOPARAM, } ,
{ "and", 0x39, 3, OPCODE_MEM16 | OPCODE_Y, } , // and $....,y
{ "nop", 0x3a, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM, } ,
{ "rla", 0x3b, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_Y, } , // rla $....,y
{ "nop", 0x3c, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_X, } , // nop $....,x
{ "and", 0x3d, 3, OPCODE_MEM16 | OPCODE_X, } , // and $....,x
{ "rol", 0x3e, 3, OPCODE_MEM16 | OPCODE_X, } , // rol $....,x
{ "rla", 0x3f, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_X, } , // rla $....,x
{ "rti", 0x40, 1, OPCODE_NOPARAM, } ,
{ "eor", 0x41, 2, OPCODE_ZEROPAGE | OPCODE_X, } , // eor ($..,x)
{ "jam", 0x42, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM } ,
{ "sre", 0x43, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_X, } , // sre ($..,x)
{ "nop", 0x44, 2, OPCODE_ILLEGAL | OPCODE_MEM8 } , // nop $..
{ "eor", 0x45, 2, OPCODE_MEM8 } , // eor $..
{ "lsr", 0x46, 2, OPCODE_MEM8 } , // lsr $..
{ "sre", 0x47, 2, OPCODE_ILLEGAL | OPCODE_MEM8 } , // sre $..
{ "pha", 0x48, 1, OPCODE_NOPARAM } ,
{ "eor", 0x49, 2, OPCODE_IMM8 } , // eor #$..
{ "lsr", 0x4a, 1, OPCODE_NOPARAM } ,
{ "asr", 0x4b, 2, OPCODE_ILLEGAL | OPCODE_IMM8 } , // asr #$..
{ "jmp", 0x4c, 3, OPCODE_MEM16 } , // jmp $....
{ "eor", 0x4d, 3, OPCODE_MEM16 } , // eor $....
{ "lsr", 0x4e, 3, OPCODE_MEM16 } , // lsr $....
{ "sre", 0x4f, 3, OPCODE_ILLEGAL | OPCODE_MEM16 } , // sre $....
{ "bvc", 0x50, 2, OPCODE_BRANCH8 } , // bvc $offset
{ "eor", 0x51, 2, OPCODE_ZEROPAGE | OPCODE_Y } , // eor ($..),y
{ "jam", 0x52, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM } ,
{ "sre", 0x53, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_Y } , // sre ($..),y
{ "nop", 0x54, 2, OPCODE_ILLEGAL | OPCODE_MEM8 | OPCODE_X } , // nop $..,x
{ "eor", 0x55, 2, OPCODE_MEM8 | OPCODE_X } , // eor $..,x
{ "lsr", 0x56, 2, OPCODE_MEM8 | OPCODE_X } , // lsr $..,x
{ "sre", 0x57, 2, OPCODE_ILLEGAL | OPCODE_MEM8 | OPCODE_X } , // sre $..,x
{ "cli", 0x58, 1, OPCODE_NOPARAM } ,
{ "eor", 0x59, 3, OPCODE_MEM16 | OPCODE_Y } , // eor $....,y
{ "nop", 0x5a, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM } ,
{ "sre", 0x5b, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_Y } , // sre $....,y
{ "nop", 0x5c, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_X } , // nop $....,x
{ "eor", 0x5d, 3, OPCODE_MEM16 | OPCODE_X } , // eor $....,x
{ "lsr", 0x5e, 3, OPCODE_MEM16 | OPCODE_X } , // lsr $....,x
{ "sre", 0x5f, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_X } , // sre $....,x
{ "rts", 0x60, 1, OPCODE_NOPARAM } ,
{ "adc", 0x61, 2, OPCODE_ZEROPAGE | OPCODE_X } , // adc ($..,x)
{ "jam", 0x62, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM } ,
{ "rra", 0x63, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_X } , // rra ($..,x)
{ "nop", 0x64, 2, OPCODE_ILLEGAL | OPCODE_MEM8 } , // nop $..
{ "adc", 0x65, 2, OPCODE_MEM8 } , // adc $..
{ "ror", 0x66, 2, OPCODE_MEM8 } , // ror $..
{ "rra", 0x67, 2, OPCODE_ILLEGAL | OPCODE_MEM8 } , // rra $..
{ "pla", 0x68, 1, OPCODE_NOPARAM } ,
{ "adc", 0x69, 2, OPCODE_IMM8 } , // adc #$..
{ "ror", 0x6a, 1, OPCODE_NOPARAM } ,
{ "arr", 0x6b, 2, OPCODE_ILLEGAL | OPCODE_IMM8 } , // arr #$..
{ "jmp", 0x6c, 3, OPCODE_WORDPTR } , // jmp ($....)
{ "adc", 0x6d, 3, OPCODE_MEM16 } , // adc $....
{ "ror", 0x6e, 3, OPCODE_MEM16 } , // ror $....
{ "rra", 0x6f, 3, OPCODE_ILLEGAL | OPCODE_MEM16 } , // rra $....
{ "bvs", 0x70, 2, OPCODE_BRANCH8 } ,
{ "adc", 0x71, 2, OPCODE_ZEROPAGE | OPCODE_Y } , // adc ($..),y
{ "jam", 0x72, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM } ,
{ "rra", 0x73, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_Y } , // rra ($..),y
{ "nop", 0x74, 2, OPCODE_ILLEGAL | OPCODE_MEM8 | OPCODE_X } ,
{ "adc", 0x75, 2, OPCODE_MEM8 | OPCODE_X } , // adc $..,x
{ "ror", 0x76, 2, OPCODE_MEM8 | OPCODE_X } , // ror $..,x
{ "rra", 0x77, 2, OPCODE_ILLEGAL | OPCODE_MEM8 | OPCODE_X } , // rra $..,x
{ "sei", 0x78, 1, OPCODE_NOPARAM } ,
{ "adc", 0x79, 3, OPCODE_MEM16 | OPCODE_Y } , // adc $....,y
{ "nop", 0x7a, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM } ,
{ "rra", 0x7b, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_Y } , // rra $....,y
{ "nop", 0x7c, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_X } , // nop $....,x
{ "adc", 0x7d, 3, OPCODE_MEM16 | OPCODE_X } , // adc $....,x
{ "ror", 0x7e, 3, OPCODE_MEM16 | OPCODE_X } , // ror $....,x
{ "rra", 0x7f, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_X } , // rra $....,x
{ "nop", 0x80, 2, OPCODE_ILLEGAL | OPCODE_IMM8 } , // nop #$..
{ "sta", 0x81, 2, OPCODE_ZEROPAGE | OPCODE_X } , // sta ($..,x)
{ "nop", 0x82, 2, OPCODE_ILLEGAL | OPCODE_IMM8 } , // nop #$..
{ "sax", 0x83, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_X } , // sax ($..,x)
{ "sty", 0x84, 2, OPCODE_MEM8 } , // sty $..
{ "sta", 0x85, 2, OPCODE_MEM8 } , // sta $..
{ "stx", 0x86, 2, OPCODE_MEM8 } , // stx $..
{ "sax", 0x87, 2, OPCODE_ILLEGAL | OPCODE_MEM8 } , // sax $..
{ "dey", 0x88, 1, OPCODE_NOPARAM } ,
{ "nop", 0x89, 2, OPCODE_ILLEGAL | OPCODE_IMM8 } , // nop #$..
{ "txa", 0x8a, 1, OPCODE_NOPARAM } ,
{ "ane", 0x8b, 2, OPCODE_ILLEGAL | OPCODE_IMM8 } , // and #$..
{ "sty", 0x8c, 3, OPCODE_MEM16 } , // sty $....
{ "sta", 0x8d, 3, OPCODE_MEM16 } , // sta $....
{ "stx", 0x8e, 3, OPCODE_MEM16 } , // stx $....
{ "sax", 0x8f, 3, OPCODE_ILLEGAL | OPCODE_MEM16 } , // sax $....
{ "bcc", 0x90, 2, OPCODE_BRANCH8 } ,
{ "sta", 0x91, 2, OPCODE_ZEROPAGE | OPCODE_Y } , // sta ($..),y
{ "jam", 0x92, 1, OPCODE_NOPARAM } ,
{ "sha", 0x93, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_Y } , // sha ($..),y
{ "sty", 0x94, 2, OPCODE_MEM8 | OPCODE_X } , // sty $..,x
{ "sta", 0x95, 2, OPCODE_MEM8 | OPCODE_X } , // sta $..,x
{ "stx", 0x96, 2, OPCODE_MEM8 | OPCODE_Y } , // stx $..,y
{ "sax", 0x97, 2, OPCODE_ILLEGAL | OPCODE_MEM8 | OPCODE_Y } , // sax $..,y
{ "tya", 0x98, 1, OPCODE_NOPARAM } ,
{ "sta", 0x99, 3, OPCODE_MEM16 | OPCODE_Y } , // sta $....,y
{ "txs", 0x9a, 1, OPCODE_NOPARAM } ,
{ "shs", 0x9b, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_Y } , // shs $....,y
{ "shy", 0x9c, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_X } , // shy $....,x
{ "sta", 0x9d, 3, OPCODE_MEM16 | OPCODE_X } , // sta $....,x
{ "shx", 0x9e, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_Y } , // shx $....,y
{ "sha", 0x9f, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_Y } , // sha $....,y
{ "ldy", 0xa0, 2, OPCODE_IMM8 } , // ldy #$..
{ "lda", 0xa1, 2, OPCODE_ZEROPAGE | OPCODE_X } , // lda ($..,x)
{ "ldx", 0xa2, 2, OPCODE_IMM8 } , // ldx #$..
{ "lax", 0xa3, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_X } , // lax ($..,x)
{ "ldy", 0xa4, 2, OPCODE_MEM8 } , // ldy $..
{ "lda", 0xa5, 2, OPCODE_MEM8 } , // lda $..
{ "ldx", 0xa6, 2, OPCODE_MEM8 } , // ldx $..
{ "lax", 0xa7, 2, OPCODE_ILLEGAL | OPCODE_MEM8 } , // lax $..
{ "tay", 0xa8, 1, OPCODE_NOPARAM } ,
{ "lda", 0xa9, 2, OPCODE_IMM8 } , // lda #$..
{ "tax", 0xaa, 1, OPCODE_NOPARAM } ,
{ "lxa", 0xab, 2, OPCODE_ILLEGAL | OPCODE_IMM8 } , // lxa #$..
{ "ldy", 0xac, 3, OPCODE_MEM16 } , // ldy $....
{ "lda", 0xad, 3, OPCODE_MEM16 } , // lda $....
{ "ldx", 0xae, 3, OPCODE_MEM16 } , // ldx $....
{ "lax", 0xaf, 3, OPCODE_ILLEGAL | OPCODE_MEM16 } , // lax $....
{ "bcs", 0xb0, 2, OPCODE_BRANCH8 } ,
{ "lda", 0xb1, 2, OPCODE_ZEROPAGE | OPCODE_Y } , // lda ($..),y
{ "jam", 0xb2, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM } ,
{ "lax", 0xb3, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_Y } , // lax ($..),y
{ "ldy", 0xb4, 2, OPCODE_MEM8 | OPCODE_X } , // ldy $..,x
{ "lda", 0xb5, 2, OPCODE_MEM8 | OPCODE_X } , // lda $..,x
{ "ldx", 0xb6, 2, OPCODE_MEM8 | OPCODE_Y } , // ldx $..,y
{ "lax", 0xb7, 2, OPCODE_ILLEGAL | OPCODE_MEM8 | OPCODE_Y } , // lax $..,y
{ "clv", 0xb8, 1, OPCODE_NOPARAM } ,
{ "lda", 0xb9, 3, OPCODE_MEM16 | OPCODE_Y } , // lda $....,y
{ "tsx", 0xba, 1, OPCODE_NOPARAM } ,
{ "lax", 0xbb, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_Y } , // lax $....,y
{ "ldy", 0xbc, 3, OPCODE_MEM16 | OPCODE_X } , // ldy $....,x
{ "lda", 0xbd, 3, OPCODE_MEM16 | OPCODE_X } , // lda $....,x
{ "ldx", 0xbe, 3, OPCODE_MEM16 | OPCODE_Y } , // ldx $....,y
{ "lax", 0xbf, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_Y } , // lax $....,y
{ "cpy", 0xc0, 2, OPCODE_IMM8 } , // cpy #$..
{ "cmp", 0xc1, 2, OPCODE_ZEROPAGE | OPCODE_X } , // cmp ($..,x)
{ "nop", 0xc2, 2, OPCODE_ILLEGAL | OPCODE_IMM8 } , // nop #$..
{ "dcp", 0xc3, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_X } , // dcp ($..,x)
{ "cpy", 0xc4, 2, OPCODE_MEM8 } , // cpy $..
{ "cmp", 0xc5, 2, OPCODE_MEM8 } , // cmp $..
{ "dec", 0xc6, 2, OPCODE_MEM8 } , // dec $..
{ "dcp", 0xc7, 2, OPCODE_ILLEGAL | OPCODE_MEM8 } , // dcp $..
{ "iny", 0xc8, 1, OPCODE_NOPARAM } ,
{ "cmp", 0xc9, 2, OPCODE_IMM8 } , // cmp #$..
{ "dex", 0xca, 1, OPCODE_NOPARAM } ,
{ "sbx", 0xcb, 2, OPCODE_ILLEGAL | OPCODE_IMM8 } , // sbx #$..
{ "cpy", 0xcc, 3, OPCODE_MEM16 } , // cpy $....
{ "cmp", 0xcd, 3, OPCODE_MEM16 } , // cmp $....
{ "dec", 0xce, 3, OPCODE_MEM16 } , // dec $....
{ "dcp", 0xcf, 3, OPCODE_ILLEGAL | OPCODE_MEM16 } , // dcp $....
{ "bne", 0xd0, 2, OPCODE_BRANCH8 } ,
{ "cmp", 0xd1, 2, OPCODE_ZEROPAGE | OPCODE_Y } , // cmp ($..),y
{ "jam", 0xd2, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM } ,
{ "dcp", 0xd3, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_Y } , // dcp ($..),y
{ "nop", 0xd4, 2, OPCODE_MEM8 | OPCODE_X } , // nop $..,x
{ "cmp", 0xd5, 2, OPCODE_MEM8 | OPCODE_X } , // cmp $..,x
{ "dec", 0xd6, 2, OPCODE_MEM8 | OPCODE_X } , // dec $..,x
{ "dcp", 0xd7, 2, OPCODE_ILLEGAL | OPCODE_MEM8 | OPCODE_X } , // dcp $..,x
{ "cld", 0xd8, 1, OPCODE_NOPARAM } ,
{ "cmp", 0xd9, 3, OPCODE_MEM16 | OPCODE_Y } , // cmp $....,y
{ "nop", 0xda, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM } ,
{ "dcp", 0xdb, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_Y } , // dcp $....,y
{ "nop", 0xdc, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_X } , // nop $....,x
{ "cmp", 0xdd, 3, OPCODE_MEM16 | OPCODE_X } , // cmp $....,x
{ "dec", 0xde, 3, OPCODE_MEM16 | OPCODE_X } , // dec $....,x
{ "dcp", 0xdf, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_X } , // dcp $....,x
{ "cpx", 0xe0, 2, OPCODE_IMM8 } , // cpx #$..
{ "sbc", 0xe1, 2, OPCODE_ZEROPAGE | OPCODE_X } , // sbc ($..,x)
{ "nop", 0xe2, 2, OPCODE_ILLEGAL | OPCODE_IMM8 } , // nop #$..
{ "isb", 0xe3, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_X } , // isb ($..,x)
{ "cpx", 0xe4, 2, OPCODE_MEM8 } , // cpx $..
{ "sbc", 0xe5, 2, OPCODE_MEM8 } , // sbc $..
{ "inc", 0xe6, 2, OPCODE_MEM8 } , // inc $..
{ "isb", 0xe7, 2, OPCODE_ILLEGAL | OPCODE_MEM8 } , // isb $..
{ "inx", 0xe8, 1, OPCODE_NOPARAM } ,
{ "sbc", 0xe9, 2, OPCODE_IMM8 } , // sbc #$..
{ "nop", 0xea, 1, OPCODE_NOPARAM } ,
{ "sbc", 0xeb, 2, OPCODE_ILLEGAL | OPCODE_IMM8 } , // sbc #$..
{ "cpx", 0xec, 3, OPCODE_MEM16 } , // cpx $....
{ "sbc", 0xed, 3, OPCODE_MEM16 } , // sbc $....
{ "inc", 0xee, 3, OPCODE_MEM16 } , // inc $....
{ "isb", 0xef, 3, OPCODE_ILLEGAL | OPCODE_MEM16 } , // isb $....
{ "beq", 0xf0, 2, OPCODE_BRANCH8 } ,
{ "sbc", 0xf1, 2, OPCODE_ZEROPAGE | OPCODE_Y } , // sbc ($..),y
{ "jam", 0xf2, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM } ,
{ "isb", 0xf3, 2, OPCODE_ILLEGAL | OPCODE_ZEROPAGE | OPCODE_Y } , // isb ($..),y
{ "nop", 0xf4, 2, OPCODE_ILLEGAL | OPCODE_MEM8 | OPCODE_X } , // nop $..,x
{ "sbc", 0xf5, 2, OPCODE_MEM8 | OPCODE_X } , // sbc $..,x
{ "inc", 0xf6, 2, OPCODE_MEM8 | OPCODE_X } , // inc $..,x
{ "isb", 0xf7, 2, OPCODE_ILLEGAL | OPCODE_MEM8 | OPCODE_X } , // isb $..,x
{ "sed", 0xf8, 1, OPCODE_NOPARAM } ,
{ "sbc", 0xf9, 3, OPCODE_MEM16 | OPCODE_Y } , // sbc $....,y
{ "nop", 0xfa, 1, OPCODE_ILLEGAL | OPCODE_NOPARAM } ,
{ "isb", 0xfb, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_Y } , // isb $....,y
{ "nop", 0xfc, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_X } , // nop $....,x
{ "sbc", 0xfd, 3, OPCODE_MEM16 | OPCODE_X } , // sbc $....,x
{ "inc", 0xfe, 3, OPCODE_MEM16 | OPCODE_X } , // inc $....,x
{ "isb", 0xff, 3, OPCODE_ILLEGAL | OPCODE_MEM16 | OPCODE_X } , // isb $....,x
};
2010-01-31 23:04
SIDWAVE
Account closed

Registered: Apr 2002
Posts: 2238
this is suppose to be an answer how to indirect load ? my god! :D
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