|I’m interested in one.|
Is there still interest in the board below?
It looks like a simple CPU board and would not be hard to do or at least make some prototype boards.
Unfortunately this discussion occurred while I was away and it looks like I missed the entire thread.
Is there a final design? I am assuming the one S100computers.com is the one the builders want.
I read something about a UART but I don’t see one on the schematic.
Sorry to reopen this old thread but I totally missed this one.
Can someone catch me up with the Reader’s Digest version of where we’re at?
Thanks and have a nice day!
PS, a picture of the prototype board would help too if its available.
Hi Don, just added the link. See here:-
bottom of page. BTW, if there is a decent core of people I’m for having Andrew do a batch run. I’m good for 3.
Very good idea's. I'm getting my ALTAIR in a couple of weeks, so I can work on interfacing the FP with it.
Q? What is the standard 10 pin header for PC style DB9? I've seen 2 pin outs. One where the wires are matched pin for pin, another where the wires are matched based on the IDC connector of the DB9 (which puts pin 6 between pins 1 & 2). Perhaps we provide two 10 pin headers?
Date: Wed, 8 May 2013 07:17:12 -0700
Subject: Re: [N8VEM-S100:1614] IMSAI 8080 CPU card replacement
If we do a PWB and build this board, I would like two of them....
I would like both the IMSI and ALTAIR front panel connector on the board....
Serial port should use standard 10 pin headers to allow connection of standard PC style DB9 cables...
Don got it will post when I get back Thursday Josh, I never got it! Can you send it right away to the above e-mail address. I will try posting it tonight. I am traveling until Friday.
Were you able to download the zip file for the 8080 CPU card?
Did you post it? I want to tell Jack where to find it.
I don't have an account to upload it. I'll try emailing it directly to you, and if you would please do me the favour of uploading it for others, I would be very thankful.
Very nice Crusty, would be interested in seeing the schematic. One day I had in mind making an S-100 debugging board – a kind of board that would systematically test/debug some of the S-100 lines one at a time. A PIC may be the way to go, though I am also curious what the Propeller II will look like. Hi Andrew,
Just thought you would like to see what I've done on one of your prototyping boards.
It's a replacement CPU card for an IMSAI 8080. It uses an 8080A and has the 16 pin socket to connect to the Front Panel.
I put 64K of RAM on the same card and a PIC microcontroller to provide Serial I/O, Floppy Disk emulation on a 8Meg flash chip and a Boot strap program.
It can boot up into CP/M 1.4 all on the same card. I did this because many of the other cards of that era are flakey and I wanted to get the IMSAI 8080 computer at the PC Museum in Brantford, Ontario working.
If anyone wants the full schematic & firmware, just let me know where to upload it.
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