RE: [N8VEM-S100:5558] ALTAIR-IMSAI 8080 CPU Board on Ebay

Hi John,

I have Tom and Matt offering one of their V1 Propeller boards... if you wish to reconsider parting with yours, I can get one from Matt, since I'll be seeing him in person in about 3 weeks.

Regards,
Josh

From: mon...@vitasoft.org
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:5558] ALTAIR-IMSAI 8080 CPU Board on Ebay
Date: Mon, 10 Nov 2014 17:18:47 -0800

No the only difference (apart from cosmetic) between the two boards is the addition of the Key-Press Hardware Interrupt Josh. There is a patch area and description here:-

http://s100computers.com/My%20System%20Pages/Console%20IO%20Board/Console%20IO%20Board.htm

as to how to add it to the V1 board. Keyboard interrupts are really needed for MSDOS.

Dare I say the board is very reliable and configurable for almost any port and status bit(s) combination, but is crying out for a good Propeller programmer to spice it up.

I just got in the VDP video boards a (and ISA converter boards). I’m checking these out before I send them out to people – a few days. I’ll include your Propeller board in the package.

As to the Propeller itself, if you are not familiar with Spin and the Propeller language you will have to climb the learning curve to spice up the boards software. The video output is a downloaded program see the Parallax web site

http://www.parallax.com/ and http://propeller.wikispaces.com/Software for example.

You will need to get the Propeller chip and serial ROM (Jameco has them – and many others). While I (or others can burn the serial ROM), if you are going to do any serious programming you need to get the Propeller “ProPlug”, you will be burning 10’s of times! I theory it’s possible to use the serial port but it’s a real pain to get working. All this is explained on the above web page.

John

From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Crusty OMO
Sent: Monday, November 10, 2014 4:05 PM
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:5552] ALTAIR-IMSAI 8080 CPU Board on Ebay

Well, I'm still putting together ideas for version 2... so how do I make it compatible with the first version of this propeller board? Are there any significant differences between the first version of the propeller board and the latest? Does anyone have a blank board I can build?

Cheers,
Josh

> Date: Mon, 10 Nov 2014 15:34:31 -0600
> From: litte...@mchsi.com
> To: n8vem...@googlegroups.com
> Subject: Re: [N8VEM-S100:5549] ALTAIR-IMSAI 8080 CPU Board on Ebay
>
> If this board would work with the first ver of the propeller
> console I/O board, it may bring my Imsai out of the dust.
>
> Plagued with memory boards and two SA400 drives that
> are a bit on the flaky side, I just put it aside.
>
> Todd
>
> ----- Original Message -----
> From: "Crusty OMO" <crus...@hotmail.com>
> To: n8vem...@googlegroups.com
> Sent: Sunday, November 9, 2014 11:17:21 PM GMT -06:00 US/Canada Central
> Subject: RE: [N8VEM-S100:5546] ALTAIR-IMSAI 8080 CPU Board on Ebay
>
>
> Hi Group,
>
> Well, I put up one of these boards fully built and tested on ebay. I hope to reach some ALTAIR / IMSAI owners that may want to bring their system out of the closet. If anyone is interested in following the auction, it's ebay item # 251712707885
> I hope it will come up on searches... I couldn't figure out how to make it "International shipping".
>
> Hopefully, it will drum up some interest in N8VEM too.
>
> Cheers,
> Josh
>
> PS. Tom,
>
> I do not have John's Propeller Board. Perhaps John has a blank sitting on the shelf with my name on it?
> I could probably write support for the board, but, it would be difficult for me to debug without a board to test with.
>
> Cheers,
> Josh
>
>
>
>
>
>
>
> Date: Sun, 9 Nov 2014 18:52:22 -0800
> Subject: Re: [N8VEM-S100:5544] ALTAIR-IMSAI 8080 CPU Board, BOM errors
> From: laf...@lafleur.us
> To: n8vem...@googlegroups.com; crus...@hotmail.com
>
>
> Josh...
>
> Do you supports John's Propeller Driven Console-IO Board
> on the 8080 board CP/M image?? if no, is this something your planing on adding??
>
> ADDING THIS WOULD MAKE A GREAT TWO BOARD SYSTEM...
>
> Thanks
>
>
> On Sun, Nov 9, 2014 at 6:00 PM, Crusty OMO < crus...@hotmail.com > wrote:
>
>
>
>
> I don't have a lot of cards, but I'm primarily using a DANE-ELEC 1GB card, works fine.
> I also tried a Kingston 4GB Micro SD (with the SD adapter) - does not work.
> Another one that simply says "MICRO SD" on it, which is a 2GB Micro SD with an adapter, does not work.
>
> Another that only has "MINI SD" written on it, which is a 2GB Mini SD with Adapter does work.
>
> I recently bought some cheap cards from China, the ELITE PRO 1GB Memory Card, they work.
>
> They all work ok on my PC, I'm guessing there's some init process that I'm not doing correctly for these larger cards. It's not worth my time to solve the mystery, I just recommend people use 1GB or smaller.
>
> Cheers,
> Josh
>
>
>
>
> Date: Sun, 9 Nov 2014 16:31:45 -0800
> Subject: Re: [N8VEM-S100:5540] ALTAIR-IMSAI 8080 CPU Board, BOM errors
> From: laf...@lafleur.us
> To: n8vem...@googlegroups.com
>
>
>
>
>
> Josh...
>
>
> what brand and size of SD cards have you tested with ??
>
>
> thanks
>
>
>
> On Sun, Nov 9, 2014 at 12:30 PM, Crusty OMO < crus...@hotmail.com > wrote:
>
>
>
>
> Hi Group,
>
> Well, the moment has come for me to stand up and admit I'm an idiot!
>
> This has come after a long search and struggle to find out why CP/M 2.2 would not save files correctly.
>
> Apparently in CP/M 2.2, they number the sectors from 0. While, iirc, in CP/M 1.4 it started at 1.
>
> I spent hours testing my disk read/write routines and could not find faults.
>
> I even thought my CP/M image got corrupt, and Rich Cini was very kind to send me another image. I was hoping the files where different, but that wasn't the problem either.
>
> The whole fix, just really required me to remove a simple "Decrement Sector" instruction because I thought CP/M used 1 as it's starting sector, where I needed 0.
>
> Sigh... ok, problem solved....
>
> New firmware file and Disk file images (with CP/M standard files uploaded) on the wiki site at:
>
> http://n8vem-sbc.pbworks.com/w/file/88759892/FIRMWARE%20and%20CPM%20v-disk%20image%20AIR-V12.zip
>
> Cheers!
> Josh Bensadon
>
>
>
>
>
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