KD11-E/EA microcode flow diagrams

Fritz Mueller fritzm at fritzm.org
Sat Jan 5 18:04:29 CST 2019


> On Jan 5, 2019, at 3:35 PM, Noel Chiappa via cctalk <cctalk at classiccmp.org> wrote:
> 
> The only difference I can see (I compared page by page, to see if each page
> had the same microinstructions on it) is that on sheet 17; the last
> microinstruction for RTI/RTT has been moved from 002 -> 744. (The actual
> microinstruction contents seem to be the same.)

That’s interesting...  So what’s at 002 now?  Maybe something new was required there by micro branch/fork logic, so the original contents had to be moved?




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