Re: [N8VEM-S100:1619] IMSAI 8080 CPU card replacement

Hi Tom,

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?

:)J

Date: Wed, 8 May 2013 07:17:12 -0700
Subject: Re: [N8VEM-S100:1614] IMSAI 8080 CPU card replacement
From: laf...@lafleur.us
To: n8vem...@googlegroups.com

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...

Good work!!

Thanks....

On Wed, May 8, 2013 at 6:08 AM, Jack Rubin <j...@ckrubin.us> wrote:

Josh, John and Don,

Got it, thanks!

Jack

From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of John Monahan
Sent: Wednesday, May 08, 2013 7:36 AM
To: n8vem...@googlegroups.com
Subject: Re: [N8VEM-S100:1612] IMSAI 8080 CPU card replacement

Don got it will post when I get back Thursday

John

Sent from my iPhone

On May 7, 2013, at 7:11 PM, Don Caprio <ilv...@gmail.com> wrote:

A copy of josh's zip file can be downloaded from here: http://uxpro.com/HB8080.zip

On 05/ 6/13 08:02 PM, John Monahan wrote:

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.

John

John Monahan Ph.D

e-mail: mon...@vitasoft.org

Text:    mon...@txt.att.net

From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Crusty OMO
Sent: Monday, May 06, 2013 6:07 PM
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:1609] IMSAI 8080 CPU card replacement

Hi John,

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.

:)J

From: mon...@vitasoft.org
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:1603] IMSAI 8080 CPU card replacement
Date: Mon, 29 Apr 2013 16:41:24 -0700

No problem Josh, will do

Send to mona...@vitasoft.org (remove underscore)

John

John Monahan Ph.D

e-mail: mon...@vitasoft.org

Text:    mon...@txt.att.net

From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Crusty OMO
Sent: Monday, April 29, 2013 3:34 PM
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:1602] IMSAI 8080 CPU card replacement

Hi John,

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.

Cheers,
Josh

From: mon...@vitasoft.org
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:1598] IMSAI 8080 CPU card replacement
Date: Sun, 28 Apr 2013 21:58:00 -0700

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.

John

John Monahan Ph.D

e-mail: mon...@vitasoft.org

Text:    mon...@txt.att.net

From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Crusty OMO
Sent: Sunday, April 28, 2013 9:20 PM
To: n8vem...@googlegroups.com
Subject: [N8VEM-S100:1596] IMSAI 8080 CPU card replacement

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 i