Hi! Neil sent me these plans for a basic 64K RAM and basic IO board. I've been planning on making this board for months if not years. We've been really busy with other S-100 projects but it sounds like it may be time to do this board. Please take a look at the schematic and send me any comments and/or ideas. Thanks and have a nice day! Andrew Lynch > -----Original Message----- > From: n8vem...@googlegroups.com [mailto:n8vem- > s1...@googlegroups.com] On Behalf Of litte...@mchsi.com > Sent: Monday, December 31, 2012 6:39 PM > To: n8vem...@googlegroups.com > Subject: Re: [N8VEM-S100:1237] S-100 board reorders > > I'm interested in building a simple 64K RAM board for the same reason. I > have two Imsai's, both with multiple RAM card(s) with many memory chips. > > If someone could point me to a schematic, I'd like to build a few. I know Don > Caprio mentioned earlier this year he had a project on the PBworks page but > I don't know where to find it. > > I'd like to look at a few designs. > > Todd > > > ----- Original Message ----- > From: "Crusty OMO" <crus...@hotmail.com> > To: n8vem...@googlegroups.com > Sent: Sunday, December 30, 2012 9:45:54 PM GMT -06:00 Central America > Subject: RE: [N8VEM-S100:1236] S-100 board reorders > > > Hi Andrew, > > Cool, thanks! Just a note on what I'm using the first (buffered) prototyping > board for.... > It's currently being used as a 64K RAM card in my IMSAI. This was done to > establish a working system. I'll be replacing this RAM card with the old RAM > cards when I test/fix them. > At that point, I'll repurpose this card to be an 8080 CPU, RAM & I/O card for > another IMSAI system I'd like to resurrect. > > Cheers, > Josh > > >
--- Begin Message ---
- To: "'Andrew Lynch'" <firstname.lastname@example.org>
- Subject: RE: S-100 Cards
- From: "Neil Breeden" <email@example.com>
- Date: Sun, 17 Apr 2011 13:12:34 -0500
- In-reply-to: <14C7393FF1E1409997FC10455A4BC4DD@andrewdesktop>
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One more thing, in 2010 I designed and wire wrapped an S-100 card that does the following, I use it with a Wameco 8080 CPU card / Tarbell Single Density controller in my CP/M 1.4 system.
64K RAM – ability to enable/disable the RAM in 4K blocks (you can leave 4K holes in the RAM space for things like memory mapped video cards (VDM1) and boot/monitor EPROMs.
AY-5-8116 Dual BAUD Rate generator
I have a serial “3M” brand Keyboard from the early 80s (early video editing system keyboard), I custom modified it to work with one of the UARTs in my design, this is on card.
Centronics Parallel port using an 8255 (I never got this fully working)
CP/M 1.4 configs
Note sure if the attached PDF has any interest in old school design (I did use a few modern parts such as 32x8 SRAMS and a MAX232), I could provide pictures as well.
I also have a set of scans of another I/O card designed by Big Dave (http://ztac.net/ - Know for FBE Research (Heathkit add on cards) back in the day) in the late 70s, I also have the wire wrapped card he wrapped from the design and have used it, in my mind this is a truly interesting artifact as the comes from the time when S-100 was state of the art. Would pics and the scans be of any historical interest.
Hi Neil! Thanks! Sorry I am all out of the S-100 Z80 CPU boards. My plan is to do a PCB reorder later this spring. Would you like me to add you to the waiting list?
I will be making an order for the S-100 Console IO boards soon -- probably this weekend actually! I can add you to the waiting list if you would like. Please let me know!
The S-100 Console IO has been redesigned to use a single Propeller and is now basically a “terminal on a board”. You plug in the VGA monitor and PS/2 keyboard, configure and go. All the other IO features have been moved to another board we are working on for later.
I hope all is well with you and your family. These are stressful times and I wish you the best!
Thanks and have a nice day!
Description: Adobe PDF document
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