A table showing the structure of a 21-bit micro-instruction.

Notices where this attachment appears

1. Ken Shirriff (kenshirriff@oldbytes.space)'s status on Saturday, 11-Mar-2023 21:32:55 UTC Ken Shirriff

   in reply to

   Each micro-instruction includes a register move between a source and destination register. The micro-instruction can specify the 5-bit code directly, or use the M and N registers for indirection. This way, microcode doesn't need to know which registers an instruction specifies.