SCHG:ASM-to-Hex Code Reference

From Sonic Retro

(Document originally by Ambil)

Welcome to my Motorola 68000 programming reference. It consists a table containing useful examples of the 68k instructions, and it can be a very nice tool for everyone who is hacking MegaDrive / Genesis games in a hex editor. For your help and confort, the parameters in the ASM commands have been coloured along with their respective places in the 16-bit instruction codes.

ASM	Binary instruction	Hex code
Adda.w (a0), a1	1101 0010 1101 0000	D2D0
Adda.w ($FFFFF100) w, a1	1101 0010 1111 1000	D2F8 F100
Adda.l ($FFFFF100).l, a1	1101 0011 1111 1001	D3F9 F100
Adda.w#$1337, a1	1101 0010 1111 1100	D2FC 1337
Addi.b #$20, d1	0000 0110 0000 0001	0601 0020
Addi.w #$1337, ($FFFFF100).w	0000 0110 0111 1000	0678 1337 F100
Addi.l #$19650917, ($FFFFF100).l	0000 0110 1011 1001	06F9 1965 0917 F100
Addq.b #1, ($FFFFF100).w	0101 0010 0011 1000	5238 F100
Addq.b #2, ($FFFFF100).w	0101 0100 0011 1000	5438 F100
Addq.b #8, ($FFFFF100).w	0101 0000 0011 1000	5038 F100
Andi.b #$36, d1	0000 0010 0000 0001	0201 0036
Andi.w #$2005, ($FFFFF100).w	0000 0010 0111 1000	0238 2005 F100
Bra.s #$24	0110 0000 0010 0100	6024
Bra #$4E1A	0110 0000 0000 0000	6000 4E1A
Bsr.s #$10	0110 0001 0001 0000	6110
Bhi.s #$10	0110 0010 0001 0000	6210
Bls.s #$10	0110 0011 0001 0000	6310
Bcc.s #$10	0110 0100 0001 0000	6410
Bcs.s #$10	0110 0101 0001 0000	6510
Bne.s #$10	0110 0110 0001 0000	6610
Beq.s #$10	0110 0111 0001 0000	6710
Bvc.s #$10	0110 1000 0001 0000	6810
Bvs.s #$10	0110 1001 0001 0000	6910
Bpl.s #$10	0110 1010 0001 0000	6A10
Bmi.s #$10	0110 1011 0001 0000	6B10
Bge.s #$10	0110 1100 0001 0000	6C10
Blt.s #$10	0110 1101 0001 0000	6D10
Bgt.s #$10	0110 1110 0001 0000	6E10
Ble.s #$10	0110 1111 0001 0000	6F10
Clr.l d0	0100 0010 1000 0000	4280
Clr.w ($FFFF4500).w	0100 0010 0111 1000	4278 4500
Cmpi.b #$26, ($FFFFFFE4).w	0000 1100 0011 1000	0C38 0026 FFE4
Cmpi.w #$4170, ($FFFFFFB0).w	0000 1100 0111 1000	0C78 4170 FFB0
Cmpi.l #$0, d2	0000 1100 1000 0010	0C82 0000 0000
Dbf.w d0, $556A	0101 0001 1100 0000	51C0 556A
Divs.w #$A, d0	1000 0001 1111 1100	81FC 000A
Divu.w ($FFFFF314).w, d1	1000 0010 1111 1000	82F8 F314
Eori.b #$80, ($FFFFF00E).w	0000 1010 0011 1000	0A38 0080 F00E
Eori.w #$3119, ($FFFFF010).w	0000 1010 0111 1000	0A78 3119 F010
Eori.l #$FFFF, (a0)	0000 1010 1001 0000	0A90 FFFF
Exg d 1, d 2	1100 0011 0100 0010	C342
Exg a 3, a 4	1100 0111 0100 1100	C74C
Exg d 5, a 6	1100 1011 1000 1110	CB8E
Ext.w d0	0100 1000 1000 0000	4880
Ext.l d1	0100 1000 1100 0001	48C1
Illegal	0100 1010 1111 1100	4AFC
Jmp (a 1)	0100 1110 1100 0001	4EA1
Jmp $65A70	0100 1110 1111 1001	4EF9 0006 5A70
Jsr $4B98C	0100 1110 1011 1001	4EB9 0004 B98C
Lea.l ($FFFFFFF4).w, a0	0100 0001 1111 1000	41F8 FFF4
Link.w a4, #$1087	0100 1110 0101 0100	4E54 1087
Lsl.b# 1, d0	1110 0011 0000 1001	E309
Lsr.wd 2, d1	1110 0100 0110 1010	E54A
Move.b #$64, ($FFFFFFE0).w	0001 0001 1111 1100	11FC 0064 FFE0
Move.w #$03E8, ($FFFFFFE0).w	0011 0001 1111 1100	31FC 03E8 FFE0
Move.l #$05F5E100, ($FFFFFFE0).l	0010 0001 1111 1100	21FC 05F5 E100 FFE0
Move.b #$20, d1	0001 0010 0011 1100	123C 0020
Move.w ($FFFF01A5).w, ($FFFFFFE0).w	0011 0011 1111 1001	33F9 01A5 FFE0
Move.l d1, ($FFFFFFE0).w	0010 0011 1100 0001	23C1 FFE0
Movea.w #$6000, a4	0011 1000 0111 1100	387C 6000
Moveq.l #$80, d1	0111 0010 1000 0000	7280
Muls.w #$19, d1	1100 0011 1111 1100	E3FC 0019
Mulu.w #$19, d2	1100 0100 1111 1100	E4FC 0019
Neg.w ($FFFFFE26).w	0100 0100 0111 1000	4478 FE26
Neg.l d0	0100 0100 1000 0000	4480
Nop	0100 1110 0111 0001	4E71
Not.w ($FFFFFE26).w	0100 0110 0111 1000	4678 FE26
Not.l d0	0100 0110 1000 0000	4680
Ori.b #$36, d1	0000 0000 0000 0001	0001 0036
Ori.w #$2005, ($FFFFF100).w	0000 0000 0111 1000	0074 2005 F100
Pea ($FFFFE53C).w	0100 1000 0111 1000	4878 E53C
Rol.wd 0, d1	1110 0001 0111 1001	E1E9
Ror.l #1, d3	1110 0010 1001 1011	E6EA
Rol.w ($FFFFFFE0).w	1110 0111 1111 1000	E7F8 FFE0
Rtr	0100 1110 0111 0111	4E77
Rts	0100 1110 0111 0101	4E75
St.b ($FFFFF000).w	0101 0000 1111 1000	50F0 F000
Sf.b ($FFFFF000).w	0101 0001 1111 1000	51F0 F000
Shi.b ($FFFFF000).w	0101 0010 1111 1000	52F0 F000
Sls.b ($FFFFF000).w	0101 0011 1111 1000	53F0 F000
Scc.b ($FFFFF000).w	0101 0100 1111 1000	54F0 F000
Scs.b ($FFFFF000).w	0101 0101 1111 1000	55F0 F000
Sne.b ($FFFFF000).w	0101 0110 1111 1000	56F0 F000
Seq.b ($FFFFF000).w	0101 0111 1111 1000	57F0 F000
Svc.b ($FFFFF000).w	0101 1000 1111 1000	58F0 F000
Svs.b ($FFFFF000).w	0101 1001 1111 1000	59F0 F000
Spl.b ($FFFFF000).w	0101 1010 1111 1000	5AF0 F000
Smi.b ($FFFFF000).w	0101 1011 1111 1000	5BF0 F000
Sge.b ($FFFFF000).w	0101 1100 1111 1000	5CF0 F000
Slt.b ($FFFFF000).w	0101 1101 1111 1000	5DF0 F000
Sgt.b ($FFFFF000).w	0101 1110 1111 1000	5EF0 F000
Sle.b ($FFFFF000).w	0101 1111 1111 1000	5FF0 F000
Suba.w (a0), a1	1101 0010 1101 0001	D2D1
Suba.w ($FFFFF100).w, a2	1101 0100 1111 1000	D2F8 F100
Suba.l ($FFFFF100).l, a3	1001 1011 1111 1001	D3F9 F100
Suba.w #$1337, a4	1001 1100 1111 1100	D2FC 1337
Subi.b #$20, d1	0000 0100 0000 0001	0601 0020
Subi.w #$1337, ($FFFFF100).w	0000 0100 0111 1000	0678 1337 F100
Subi.l #$19650917, ($FFFFF100).l	0000 0100 1111 1001	06F9 1965 0917 F100
Subq.b #1, ($FFFFF100).w	0101 0011 0011 1000	5238 F100
Subq.b #2, ($FFFFF100).w	0101 0101 0011 1000	5438 F100
Subq.b #8, ($FFFFF100).w	0101 0001 0011 1000	5038 F100
Swap.w d0	0100 1000 0100 0000	4840
Tas.b ($FFFFFE00).w	0100 1010 1111 1000	4AF8 FE00
Trap #1	0100 1110 0100 0001	4E41
Trapv	0100 1110 0111 0110	4E76
Tst.ld1	0100 1010 1000 0001	4A81
Tst.w ($FFFFAA80).w	0100 1010 0111 1000	4A78 AA80
Tst.b ($FFFFAA80).w	0100 1010 0011 1000	4A38 AA80
Unlk a0	0100 1110 0101 1000	4E58

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