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A06B.DOC
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1994-12-30
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31KB
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531 lines
6-9
Opcodes Instruction Description
67 or nil A2 (prefix) 3 Use 16-bit address (indexing) in next instruction
67 or nil A4 (prefix) 3 Use 32-bit address (indexing) in next instruction
37 AAA ASCII adjust AL (carry into AH) after addition
D5 0A AAD ASCII adjust before division (AX = 10*AH + AL)
D4 0A AAM ASCII adjust after multiply (AL/10: AH=Quo AL=Rem)
3F AAS ASCII adjust AL (borrow from AH) after subtraction
14 ib ADC AL,ib Add with carry immediate byte into AL
15 iv ADC eAX,iv Add with carry immediate vword into eAX
80 /2 ib ADC eb,ib Add with carry immediate byte into EA byte
10 /r ADC eb,rb Add with carry byte register into EA byte
83 /2 ib ADC ev,ib Add with carry immediate byte into EA vword
81 /2 iv ADC ev,iv Add with carry immediate vword into EA vword
11 /r ADC ev,rv Add with carry vword register into EA vword
12 /r ADC rb,eb Add with carry EA byte into byte register
13 /r ADC rv,ev Add with carry EA vword into vword register
04 ib ADD AL,ib Add immediate byte into AL
05 iv ADD eAX,iv Add immediate vword into eAX
80 /0 ib ADD eb,ib Add immediate byte into EA byte
00 /r ADD eb,rb Add byte register into EA byte
83 /0 ib ADD ev,ib Add immediate byte into EA vword
81 /0 iv ADD ev,iv Add immediate vword into EA vword
01 /r ADD ev,rv Add vword register into EA vword
02 /r ADD rb,eb Add EA byte into byte register
03 /r ADD rv,ev Add EA vword into vword register
0F 20 ADD4S N Add CL nibbles BCD, DS:SI into ES:DI (CL even,NZ)
24 ib AND AL,ib Logical-AND immediate byte into AL
25 iv AND eAX,iv Logical-AND immediate vword into eAX
80 /4 ib AND eb,ib Logical-AND immediate byte into EA byte
20 /r AND eb,rb Logical-AND byte register into EA byte
83 /4 ib AND ev,ib Logical-AND immediate byte into EA vword
81 /4 iv AND ev,iv Logical-AND immediate vword into EA vword
21 /r AND ev,rv Logical-AND vword register into EA vword
22 /r AND rb,eb Logical-AND EA byte into byte register
23 /r AND rv,ev Logical-AND EA vword into vword register
63 /r ARPL ew,rw 2 Adjust RPL of EA word not smaller than RPL of rw
62 /r BOUND rv,m2v 2 INT 5 if rw not between 2 vwords at [m] inclusive
0F BC BSF rv,ev 3 Set rv to lowest position of NZ bit in ev
0F BD BSR rv,ev 3 Set rv to highest position of NZ bit in ev
0F C8+r BSWAP rd 4 Swap bytes 1,4 and 2,3 of dword register
0F BA/4 ib BT rv/m,ib 3 Set Carry flag to bit # ib of array at rv/m
0F A3/r BT rv/m,rv 3 Set Carry flag to bit # rv of array at rv/m
0F BA/7 ib BTC rv/m,ib 3 Set CF to, then compl bit ib of array at rv/m
0F BB/r BTC rv/m,rv 3 Set CF to, then compl bit rv of array at rv/m
0F BA/6 ib BTR rv/m, 3 Set CF to, then reset bit ib of array at rv/m
0F B3/r BTR rv/m,rv 3 Set CF to, then reset bit rv of array at rv/m
0F BA/5 ib BTS rv/m,ib 3 Set CF to, then set bit ib of array at rv/m
0F AB/r BTS rv/m,rv 3 Set CF to, then set bit rv of array at rv/m
6-10
9A cp CALL cp Call far segment, immediate 4- or 6-byte address
E8 cv CALL cv Call near, offset relative to next instruction
FF /3 CALL ep Call far segment, address at EA memory location
FF /2 CALL ev Call near, offset absolute at EA vword
0F FF ib CALL80 ib N Call 8080-emulation code at INT number ib
98 CBW Convert byte into word (AH = top bit of AL)
99 CDQ 3 Convert dword to qword (EDX = top bit of EAX)
F8 CLC Clear carry flag
FC CLD Clear direction flag so SI and DI will increment
FA CLI Clear interrupt enable flag; interrupts disabled
0F 12/0 CLRBIT eb,CL N Clear bit CL of eb
0F 13/0 CLRBIT ew,CL N Clear bit CL of ew
0F 1A/0 ib CLRBIT eb,ib N Clear bit ib of eb
0F 1B/0 ib CLRBIT ew,ib N Clear bit ib of ew
0F 06 CLTS 2 Clear task switched flag
F5 CMC Complement carry flag
3C ib CMP AL,ib Subtract immediate byte from AL for flags only
3D iv CMP eAX,iv Subtract immediate vword from eAX for flags only
80 /7 ib CMP eb,ib Subtract immediate byte from EA byte for flags only
38 /r CMP eb,rb Subtract byte register from EA byte for flags only
83 /7 ib CMP ev,ib Subtract immediate byte from EA vword for flags only
81 /7 iv CMP ev,iv Subtract immediate vword from EA vword, flags only
39 /r CMP ev,rv Subtract vword register from EA vword for flags only
3A /r CMP rb,eb Subtract EA byte from byte register for flags only
3B /r CMP rv,ev Subtract EA vword from vword register for flags only
0F 26 CMP4S N Compare CL nibbles BCD, DS:SI - ES:DI (CL even,NZ)
A6 CMPS mb,mb Compare bytes [SI] - ES:[DI], advance SI,DI
A7 CMPS mv,mv Compare vwords [SI] - ES:[DI], advance SI,DI
A6 CMPSB Compare bytes DS:[SI] - ES:[DI], advance SI,DI
A7 CMPSD Compare dwords DS:[SI] - ES:[DI], advance SI,DI
A7 CMPSW Compare words DS:[SI] - ES:[DI], advance SI,DI
0F C7 /1 CMPX8 mq 5 If EDXEAX=mq then mq:=ECXEBX, else EAXEDX:=mq
0F B0 /r CMPXCHG eb,rb 4 If AL=eb then set eb to rb, else set AL to eb
0F B1 /r CMPXCHG ev,rv 4 If eAX=ev then set ev to rv, else set eAX to ev
0F A2 CPUID 5 If EAX=1 set EDXEAX to CPU identification values
99 CWD Convert word to doubleword (DX = top bit of AX)
98 CWDE 3 Sign-extend word AX to doubleword EAX
2E CS (prefix) Use CS segment for the following memory reference
27 DAA Decimal adjust AL after addition
2F DAS Decimal adjust AL after subtraction
FE /1 DEC eb Decrement EA byte by 1
FF /1 DEC ev Decrement EA vword by 1
48+rv DEC rv Decrement vword register by 1
F6 /6 DIV eb Unsigned divide AX by EA byte (AL=Quo AH=Rem)
F7 /6 DIV ev Unsigned divide eDXeAX by EA vword (eAX=Quo eDX=Rem)
3E DS (prefix) Use DS segment for the following memory reference
6-11
C8 iw 00 ENTER iw,0 1 Make stack frame, iw bytes local storage, 0 levels
C8 iw 01 ENTER iw,1 1 Make stack frame, iw bytes local storage, 1 level
C8 iw ib ENTER iw,ib 1 Make stack frame, iw bytes local storage, ib levels
26 ES (prefix) Use ES segment for the following memory reference
F(any) Floating point set is in Chapter 7
F4 HLT Halt
F6 /7 IDIV eb Signed divide AX by EA byte (AL=Quo AH=Rem)
F7 /7 IDIV ev Signed divide eDXeAX by EA vword (eAX=Quo eDX=Rem)
F6 /5 IMUL eb Signed multiply (AX = AL * EA byte)
F7 /5 IMUL ev Signed multiply (eDXeAX = eAX * EA vword)
0F AF /r IMUL rv,ev 3 Signed multiply ev into rv
6B /r ib IMUL rv,ib 1 Signed multiply imm byte into vword register
69 /r iv IMUL rv,iv 1 Signed multiply imm vword into vword register
69 /r iv IMUL rv,ev,iv 1 Signed multiply (rv = EA vword * imm vword)
6B /r ib IMUL rv,ev,ib 1 Signed multiply (rv = EA vword * imm byte)
E4 ib IN AL,ib Input byte from immediate port into AL
EC IN AL,DX Input byte from port DX into AL
E5 ib IN eAX,ib Input vword from immediate port into eAX
ED IN eAX,DX Input vword from port DX into eAX
FE /0 INC eb Increment EA byte by 1
FF /0 INC ev Increment EA vword by 1
40+rv INC rv Increment vw