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But "undefined ops" are not part of the "8080 instruction set"; supporting those would be "binary compatible with the 8080 silicon". The parity flag is a break
by kazinator 3mo ago
But "undefined ops" are not part of the "8080 instruction set"; supporting those would be "binary compatible with the 8080 silicon".
The parity flag is a breaker though; "binary compatible for code only relying on the 8080 instruction set, other than values of the parity flag".
- Zardoz84 3mo agoBy the same thinking that have the parent post The 80286 and 80386 aren't binary compatible with the 8086. Because they replaced undefined opcodes with new stuff.