I was assuming a sinusoidal AB-AB chain starting from
the slots labelled
"A" and "B" (out of A, B, C, and D). Now... the one twist is that
the cards
are installed with the CPU facing the bottom of the cage (solder side up),
but the keys on the backplane connectors are a dead giveaway.
Heath backplane is serpentine AB only.
Yes, also
DLV11 or the heath serial card both should have HALT on BREAK
enabled. <both support it as do the 11/03>
I didn't even try that. For now, because of bootstrap considerations, I'm
running with an 11/23plus CPU and a VT-220 (because it's close).
VT220 supports break generation and all.
Speaking of bootstraps, what did the H-11 come with
stock? BDV-11? Custom
Heath board?
No BDV11, that was a dec card. I remember a hand entered ODT boot. You
could use a BDV11 or TEV11. The last time I used a real H11 running H27
and HT11 was 1981.
Allison