4 ms·
I think CALL/RET are mostly arbitrary, where there were free opcodes. But RET iw and RETF iw share the microcode, using bit 3 of the instruction to distinguish
by kens 3y ago
I think CALL/RET are mostly arbitrary, where there were free opcodes. But RET iw and RETF iw share the microcode, using bit 3 of the instruction to distinguish them. So they need to have opcodes differing only in bit 3.
- ngneer 3y agoCool, thank you! Interesting about the encoding proximity for flows with shared microcode. I wonder if that simplified the decoder.