PDP 11/24 - A Step Backwards

Chris Zach cz at alembic.crystel.com
Tue Mar 29 08:04:15 CDT 2022

On 3/29/2022 2:28 AM, Joshua Rice wrote:
> Just to chip in my 5 pennies worth. At least in the QBUS world, the only 
> chipset that wouldn't ODT without memory is the original LSI-11 (and the 
> T11 i believe, but that's moot because they came with RAM onboard). You 
> should still get ODT on F11 and J11 chipsets even without RAM.

I totally agree and this threw me for a bit of a loop when I was testing 
my 11/24. I can do a quick check next week, but from what I can remember 
I was baffled at no ODT until memory was in. Maybe it was the 7273's but 
I went through 4 cpu boards trying it. Memory in and it all worked.

And I have 3 spare 11/24 cpus all in working order for sale if anyone 
needs one :-)

I'll double check later.


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