Recent content by pjh

Has the amaus.org/static/S100 website been updated to a new web address? I am hoping it is still available somewhere. This was an incredible resource of S-100 information.

I bought a partially populated Morrow DJ-DMA board on Ebay recently. It appears that the previous owner bought it as a bare-board but never finished it. I downloaded the "DJ-DMA Technical Manual Rev 1" and looked over it. I noticed that the parts list in the manual shows 1 PAL, 1 FPLA, and 5...

After acquiring a 3rd CCS 2422 FDC and checking it out, I was able to boot the CCS CP/M disk that I have. I have two other 2422s that I couldn't get to work after chip testing everything on those boards except the PROMS. PROMS have been a gray area for me but I figured that these must be the...

I recently acquired an Optronics TP-100 eprom programmer card. Does anyone know where to locate a manual or software for the card? A quick look at my usual GO-TO websites didn't turn up anything. Any help would be appreciated. Phillip

I am hoping that someone who is running a CCS system can help me. I keep getting an RST ERR message when I attempt to Boot the system. Over time I acquired a set of CCS cards plus a CCS Master Boot Disk. I got the Master disk first and tested it on my 486 system. I did a CDIR /A1 A: to...

I was trying to test a new ram card with different CPU cards to see what it would work with. I pulled out my Jade JGZ80 card and removed the DDBOOT eprom to install the 2708 BIGZ Monitor eprom. As careful as I try to be when I plug in chips, I bent the number 12 pin on my ceramic 2708 eprom...

In recovering failed or erratically functioning S-100 boards, one of the things that I do is chip test as many of the 74xx TTL chips that I can. I use a breadboard set up with a 555 timer and a 7493 4-bit binary counter to provide input signals for the chips to be tested. On chips with more...

I have had an Ithaca IA-1010 processor for several years, but never could seem to get it to work reliably. I had pulled it out and put it away several times until recently when I managed to get it to work with an SD Systems ExpandoRam with 32K onboard, an IMS 4-port serial card and a simple...

I recently acquired a Digital Research Computers eprom programmer card. Does anyone know where to locate a manual or software for the card. A quick look at my usual GO-TO websites didn't turn up anything. Any help would be appreciated. Sorry for the upside down photo. I rotated it right side...

This question may have already been discussed in the forum. Does anyone have any information on why the MABEN website can no longer be accessed. It was a rich resource for an extensive list of vintage computer manufacturers. Is it down to be reworked? Is there a mirror of the site? Will it...

Help with XOR 64K-DQ card configuration. Is there anyone who is using an XOR 64K-DQ dynamic memory card. I need some help in getting mine configured so that it will work. When I first got the board several years ago, I tested the regulators, replaced the tantalums and then tested all of the...

S-U-C-C-E-S-S !!! I now have a working Jade Double D CP/M 2.2 system. While working on another project, I came across a box of floppy disk controller cards that I had not originally tested. I got out my 486 system and used Dave Dunfield's TESTFDC program to check the cards. I found a...

Has anyone had any problems getting a Jade System to boot with the disk created from the JADEDD.IMD file from Dave Dunfield's website. After the startup/reset, the signon message appears: Jade Computer Products 20k CP/M 2.2 DDBIOS2 Eight to ten seconds later an error message appears...

I just acquired an S-100 ADS (Ackerman Digital Systems) Promblaster eprom programmer card. This card is capable of programming 2708s - 2764s. There was a CP/M program that was included with a new card called Promwriter that would programmatically configure the card for each type eprom. The...

Hi guys, Thought I would add a final note about using a phone cord as a keyboard cable. Here is a picture of my Kaypro 4 running with a beige ATT handset cord as the keyboard cable. Maybe it will help resolve the uncertainty. Phillip