[vcf-midatlantic] BYT-8 MPU

[Mike Loewen]

    Thanks, Jonathon and Jeff.  I'll get around to testing it, one of these 
days.

On Tue, 24 Apr 2018, systems_glitch wrote:

> Mike,
>
> It's not a missing ROM, it's an Intel 8214 interrupt controller (left
> socket, closest to regulators) and an Intel 8212 latch (second socket). I'm
> pretty sure you don't need them if you don't need to use the vectored
> interrupt facilities. The regulator hackings-on isn't that uncommon with
> these boards. It's a pretty nice Intel 8080 CPU board, especially with the
> interrupt controller. They were intended for the Byte Shop BYT-8 of course
> (also sold branded as Olson, and as a Bell and Howell trainer kit). People
> used them in other S-100 systems though. They're somewhat common, and even
> the blank boards aren't all that uncommon -- I've got one, had several
> others that I've sold or traded to others on the list. The front panel
> connector is IMSAI compatible.
>
> Figure that tested and working it's probably worth $150-200 on eBay.
> Untested, $100 or so probably.
>
> I have a lot of the manuals scanned on my site:
>
> http://filedump.glitchwrks.com/manuals/s100/byt_8/
>
> Thanks,
> Jonathan
>
> On Tue, Apr 24, 2018 at 6:24 PM, Mike Loewen via vcf-midatlantic <
> vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:
>
>>
>>    I have what appears to be the CPU board for a Byte Shop BYT-8:
>>
>> http://q7.neurotica.com/Oldtech/S100/ByteMPU-2.jpg
>>
>>    BYTE 4-76 MPU  C1000-1001  ASSY REV A
>>
>>    It appears to be missing a ROM chip, and has definitely been hacked on
>> (weird voltage regulator or transistor in lower left).
>>
>>    Is it worth putting this up for auction on the
>> site-whose-name-shall-not-be-mentioned?  I also have an unbuilt PCB.
>>
>>
>> Mike Loewen                             mloewen at cpumagic.scol.pa.us
>> Old Technology                          http://q7.neurotica.com/Oldtech/
>>
>>
>

Mike Loewen				mloewen at cpumagic.scol.pa.us
Old Technology				http://q7.neurotica.com/Oldtech/