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 Virtual 36 bit computer 
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Joined: Mon Oct 07, 2019 2:41 am
Posts: 768
The new mother board and front panel works after some issues with the sockets on the 22v10's.
Most of the re design was to use standard 8 resistor sips, 4.7K,2.2K,3.3K.
ATF1508's (15 ns) 128 micro cell CPLD's are used everywhere as well as CMOS 22v10's for programmable logic.
Historic parts like 74XX219's and 6850 ACIA's still can be found on ebay.
Now I need to box this up after I get some software written, like a file system.


Wed Feb 12, 2025 5:05 am

Joined: Mon Oct 07, 2019 2:41 am
Posts: 768
The virtual computer went *Poof* into hyper space, and reality split.
The instruction set is almost stable, with just some changes in shift encoding.
Testing out the new mother board now with a hello world program.

The nice thing is I can change a mother board jumper and boot at octal 760,000 from the ROM
with no front panel.. Of course the front panel is needed to
bootstrap data into the EEPOM.
Ben.
Foot note, the shift changes are in and working. Can shift from 1..9


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Wed Feb 12, 2025 7:42 pm
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