Reformed the big capacitors, tested the power supply, replaced all
electrolytics on the control board (two were leaking) with hermetically sealed
axial tantalums, and powered up on the variac today. Seems to be largely
working at least for reads!
Thanks,
Jonathan
‐‐‐ Original Message
There's a "Model 20..." on the silkscreen, but as luck would have it, the
roll-over standoff in the middle of the board goes through the rest of the
number!
Thanks,
Jonathan
‐‐‐ Original Message ‐‐‐
On Sunday, October 31st, 2021 at 09:03, Mike Douglas via cctalk
wrote:
> It might
It might be the Mikra-D MD-2040 1702 programmer. Similar to the MD-2044 on my
website but a parallel data interface (e.g., manual switches and lights)
instead of a serial RS-232 interface. The 2040 is briefly mentioned in the .pdf
file here: https://deramp.com/downloads/eprom_p...kra-d/md-2044/
gt;
> Dwight
>
> From: cctalk cctalk-boun...@classiccmp.org on behalf of dwight via cctalk
> cctalk@classiccmp.org
>
> Sent: Sunday, October 31, 2021 6:53 AM
>
> To: General Discussion: On-Topic and Off-Topic Posts cctalk@classiccmp.org
>
> Subject: Re: Mystery 1702A(
as specified.
Dwight
From: cctalk on behalf of dwight via cctalk
Sent: Sunday, October 31, 2021 6:53 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Mystery 1702A(?) EPROM Programmer
I also agree, it looks like the MP7-03 with some I/O
: Saturday, October 30, 2021 8:03 PM
To: Chuck Guzis ; General Discussion: On-Topic and Off-Topic
Posts
Subject: Re: Mystery 1702A(?) EPROM Programmer
I assume the box is just a somewhat generic project enclosure, similar to
standard offerings from Bud, Hammond, etc.
I'll go through the power
I assume the box is just a somewhat generic project enclosure, similar to
standard offerings from Bud, Hammond, etc.
I'll go through the power supply tomorrow or Monday and see where I can get
with read mode. It looks like writes should be hardware timed, so that's good
news!
Thanks,
Jonathan
On 10/30/21 7:35 PM, Jonathan Chapman via cctalk wrote:
> It's definitely not Intel, but I pulled the control board and traced it a bit
> this afternoon. It seems to be very similar to the circuit used on the Intel
> MP7-03 1702A programming module for the MCS-4/MCS-8 development systems.
>
It's definitely not Intel, but I pulled the control board and traced it a bit
this afternoon. It seems to be very similar to the circuit used on the Intel
MP7-03 1702A programming module for the MCS-4/MCS-8 development systems.
Thanks,
Jonathan
‐‐‐ Original Message ‐‐‐
On Saturday,
On 10/30/21 12:11 PM, Jonathan Chapman via cctalk wrote:
Does anyone recognize this EPROM programmer:
https://imgur.com/a/GcmefTl
It appears to be for 1702A EPROMs. Working on cleaning it up and figuring it
out!
It reminds me of Intel MCS-80 boards, from the 8008 days.
Jon
Does anyone recognize this EPROM programmer:
https://imgur.com/a/GcmefTl
It appears to be for 1702A EPROMs. Working on cleaning it up and figuring it
out!
Thanks,
Jonathan
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