strange number corruption on pdp11/34
jnc at mercury.lcs.mit.edu
Fri Jan 30 07:19:08 CST 2015
> From: Don North
> So here is the octal print routine in the M9312 console boot prom for
> the '34:
I'm curious, is that the 'original' source, or is this dis-assembled from the
PROM contents? Is the complete program available somewhere?
> So I would speculate either 'rol' or 'rolb' are always rotating in a 0
> bit instead of the c-bit, or possibly the c-bit is stuck at zero.
Yup, good suggestion. And that would likely explain why things boot; I can't
see too many OS's using 'ROLB'!
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