VT101 8085 CPU Fault

Pete Turnbull pete at dunnington.plus.com
Fri Jan 23 20:53:09 CST 2015

On 24/01/2015 00:52, Johnny Billquist wrote:
> On 2015-01-24 01:29, Robert Jarratt wrote:
>> 1. Given the ROM is marked: CN55004N 8232, DEC TP03, 23-028E4-00, and
>> it is 24-pin, is MCM68766 really the right choice?

As close as you'll get in an EPROM, modulo chip select polarities. 
Someone on the list promised me a few some years ago, but I never got 
them :-(

>> 3. Does anyone have a ROM image for the VT101?

I don't, sorry, but if anyone get an image dumped, I'll host it 
alongside the others on my website.

> Given it's "8232", I could suspect that it would be a 4K rom...

Nope, it's 8K.  A DEC 23-xxxE4 part number specifies 8K ROM.  I expect 
8232 is the date code.


Pete Turnbull

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