Intel iAPX 86/88 User Manual page 51

8086/8088
CPU
Table 1-16 Instruction Set Reference Data (continued)
OR
I
OR destination, source
Logical inclusive or
FIODITSZAPC
ags
0
XXUXO
Operands Clocks
Transfers·
Bytes
Coding Example
register, register 3(3)
-
2 ORAL, BL
register, memory 9(10)+EA 1 2-4 OR DX, PORT _ID [DI]
memory, register 16(10)+EA 2 2-4 OR FLAG_BYTE, CL
accumulator, immediate
4(3-4)
-
2-3 OR AL, 011011008
register, immediate 4(4)
-
3-4 ORCX,01H
memory, immediate 17(16)+EA 2 3-6 OR [BX], CMD_WORD, OCFH
OUT lOUT port, accumulator
Flags
ODITSZAPC
Output byte or word
Operands Clocks Transfers· Bytes Coding Example
immed 8, accumulator 10(9) 1 2 OUT 44,AX
DX, accumulator 8(7) 1 1 OUTDX, AL
OUTS lOUTS port, source-string
Flags
ODITSZAPC
Output string
Operands Clocks Transfers·
Bytes Coding Example
port, source-string (14) 2 1 OUTS PORT2, BUFF2
(repeat) port, source-string
(8) + 8/rep) 2/rep 1 REP OUTS PORT2, BUFF2
POP
I
POP destination
Flags
OOITSZAPC
Pop word off stack
Operands
Clocks
Transfers·
Bytes Coding Example
register
8(10) 1 1 POP OX
seg-reg (CS illegal) 8(8) 1 1 POP OS
memory 17(20)+EA 2 2-4 POP PARAMETER
POPA
I
POPA (no operands)
Pop all registers
Flags 0 D ITS ZAP C
Operands Clocks Transfers· Bytes Coding Example
(no operands)
(51) 8
1
POPA
POPF
I
POPF (no operands)
Flags
OOITSZAPC
Pop all registers RRRRRRRRR
Operands Clocks Transfers· Bytes Coding Example
(no operands)
8(8) 1 1 POPF
PUSH
I
PUSH source
Flags
OOITSZAPC
Push word onto stack
Operands Clocks
Transfers·
Bytes Coding Example
register 11 (1 0)
1 1 PUSH SI
seg-reg (CS legal) 10(9) 1 1
PUSH ES
memory
16(16)+ EA 2 2-4 PUSH DRETURN_CODE [SI]
'For the 8086 (80186) add four clocks for each 16-bit word transfer with an odd address. For the 8088 (80188) add four clocks for each 16-bit word
transfer.
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