question

[sss89]

is shr a valid opcode?

by the way thanks for the last answer.

[DL!]

Following are all 8086 features that aren't supported by the engine:

1. segment prefixes: ES:, DS:, SS:, CS:
2. ASCII conversion: DAA, DAS, AAA, AAS, AAM, AAD
3. bit shifting: ROL, ROR, RCL, RCR, SHL, SHR, SAR
4. signed multiplication: IMUL, IDIV

[LB_]

הפקודות של 4 לא הוספו רק לאחר תקופת ה-8086?

[DL!]

No, they were already valid on the 8086.
A good way to find out is to see what the windows "debug.exe" supports (it only supports 8086 opcodes).

[מאת]

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