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Befehlssatz des intel 8008

c8008

Binär Mnem1 Mnem2 0 0 0 0 0 0 0 x HLT HLT 1 1 1 1 1 1 1 1 HLT HLT 0 1 0 0 M M M 1 INP IN port MMM 0 1 R R M M M 1 OUT OUT port RRMMM (RR <> 0) ------------------------------------------------------------------------ 0 1 x x x 1 0 0 JMP JMP unconditionally jump 0 1 0 0 0 0 0 0 JFC JNC JMP if carry = 0 0 1 0 0 1 0 0 0 JFZ JNZ JMP if result <> 0 0 1 0 1 0 0 0 0 JFS JP JMP if sign = 0 (positive) 0 1 0 1 1 0 0 0 JFP JPO JMP if parity = odd 0 1 1 0 0 0 0 0 JC JC JMP if carry = 1 0 1 1 0 1 0 0 0 JZ JZ JMP if result = 0 0 1 1 1 0 0 0 0 JS JM JMP if sign = 1 (negative) 0 1 1 1 1 0 0 0 JP JPE JMP if parity = even 0 1 x x x 1 1 0 CAL CALL unconditionally call subroutine 0 1 0 0 0 0 1 0 CFC CNC CALL if carry = 0 0 1 0 0 1 0 1 0 CFZ CNZ CALL if result <> 0 0 1 0 1 0 0 1 0 CFS CP CALL if sign = 0 (positive) 0 1 0 1 1 0 1 0 CFP CPO CALL if parity = odd 0 1 1 0 0 0 1 0 CC CC CALL if carry = 1 0 1 1 0 1 0 1 0 CZ CZ CALL if result = 0 0 1 1 1 0 0 1 0 CS CM CALL if sign = 1 (negative) 0 1 1 1 1 0 1 0 CP CPE CALL if parity = even 0 0 x x x 1 1 1 RET RET unconditionally return 0 0 0 0 0 0 1 1 RFC RNC RET if carry = 0 0 0 0 0 1 0 1 1 RFZ RNZ RET if result <> 0 0 0 0 1 0 0 1 1 RFS RP RET if sign = 0 (positive) 0 0 0 1 1 0 1 1 RFP RPO RET if parity = odd 0 0 1 0 0 0 1 1 RC RC RET if carry = 1 0 0 1 0 1 0 1 1 RZ RZ RET if result = 0 0 0 1 1 0 0 1 1 RS RM RET if sign = 1 (negative) 0 0 1 1 1 0 1 1 RP RPE RET if parity = even 0 0 A A A 1 0 1 RST RST call subroutine at adrs AAA000 ------------------------------------------------------------------------ 1 1 D D D S S S Lds MOV d,s load d with content of s 1 1 D D D 1 1 1 LdM MOV d,M load d with content of Mem 1 1 1 1 1 s s s LMs MOV M,s load M with content of s 0 0 d d d 1 1 0 LdI MVI d Load register d with data 0 0 1 1 1 1 1 0 LMI MVI M Load Memory M with data b 0 0 d d d 0 0 0 INd INR d increment register d (d<>A) 0 0 d d d 0 0 1 DCd DCR r decrement register d (d<>A) ------------------------------------------------------------------------ 1 0 0 0 0 s s s ADs ADD s add contents of s to A 1 0 0 0 0 1 1 1 ADM ADD M add contents of M to A 0 0 0 0 0 1 0 0 ADI ADI b add constant b to A 1 0 0 0 1 s s s ACs ADC s add contents of s + CY to A 1 0 0 0 1 1 1 1 ACM ADC M add contents of M + CY to A 0 0 0 0 1 1 0 0 ACI ACI b add constant b + CY to A 1 0 0 1 0 s s s SUs SUB s sub contents of s from A 1 0 0 1 0 1 1 1 SUM SUB M sub contents of M from A 0 0 0 1 0 1 0 0 SUI SUI b sub constant b from A 1 0 0 1 1 s s s SBs SBB s sub contents of s + CY from A 1 0 0 1 1 1 1 1 SBM SBB M sub contents of M + CY from A 0 0 0 1 1 1 0 0 SBI SBI b sub constant b + CY from A 1 0 1 0 0 s s s NDs ANA s logical AND of s and A to A 1 0 1 0 0 1 1 1 NDM ANA M logical AND of M and A to A 0 0 1 0 0 1 0 0 NDI ANI b logical AND of const b and A to A 1 0 1 0 1 s s s XRs XRA s logical XOR of s and A to A 1 0 1 0 1 1 1 1 XRM XRA M logical XOR of M and A to A 0 0 1 0 1 1 0 0 XRI XRI b logical XOR of const b and A to A 1 0 1 1 0 s s s ORs ORA s logical OR of s and A to A 1 0 1 1 0 1 1 1 ORM ORA M logical OR of M and A to A 0 0 1 1 0 1 0 0 ORI ORI b logical OR of const b and A to A 1 0 1 1 1 s s s CPs CMP s compare s with A, set flags 1 0 1 1 1 1 1 1 CPM CMP M compare M with A, set flags 0 0 1 1 1 1 0 0 CPI CPI b compare const b with A, set flags ------------------------------------------------------------------------ 0 0 0 0 0 0 1 0 RLC RLC rotate content of A left 0 0 0 0 1 0 1 0 RRC RRC rotate content of A right 0 0 0 1 0 0 1 0 RAL RAL rotate content of A left through CY 0 0 0 1 1 0 1 0 RAR RAR rotate content of A right through CY ------------------------------------------------------------------------ Anmerkungen: Alle I-Befehle besitzen ein zweites Datenbyte b Alle JMP- und CALL-Befehle besitzen zwei Adressbytes. Zuerst folgt das niederwertige Byte, dann das höherwertige. In diesem haben die beiden höchstwertigen Bits keine Bedeutung, da der 8008 nur 14 Adressbits benutzt. Die Bezeichnungen für Mnem1 entstammen dem Intel Datenbuch 1974, die für Mnem2 dem Intel Datenbuch 1975.

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