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There was also a screen saver where cows would walk around on the screen and you'd hear "mooofff" as they plopped a pie that would turn off pixels on that part of the screen. :)

It has been a LONG time ago, but, back in the mid-90s I worked for a gray market Apple repair shop in NE TX. I had an SE/30 on my desk that was connected to the network for filling out repair notes and finalizing charges for customers. On that computer I had a program that ran in the background...

I've never used the Ruud. I use the Landmark one you drop in place of the exiting BIOS so I'm far more familiar with it. Even at that I'd probably go old-school and wire up a reset switch then check the chip enables on the DMA, CTC, PPI, and DRAM to see where in the line of testing things are...

Per the same page: Port 80 is for the POST card.

If you can, pick up a POST card off of eBay and see what code pops up when it stops. Short long Short on beeps is "step 2" on Ruud BIOS. Very early step in the BIOS. You could go through the list of items tested and use your logic probe to see if the CTC, DMA, PPI, and DRAM are being...

Had one that kept crashing and doing weird things... Reset wouldn't reset the system. Replaced the CPU and it ran fine. Had a IIe that had strange memory issues at random. The ground pin on the MMU had been replaced and the pin was corroded/discolored. Replaced that replacement pin with a nice...

Mice can get in via any opening that they can fit their skull through. It doesn't take much - a missing backplane cover, a missing port cover, 5.25" drive door, etc...

Yes! Thank you. Goes to show that the jumper settings I back traced were correct. :)

I found info on an S100 card that used that chip but it had no pinouts. Haven't been able to find a data sheet either. Just had to reverse engineer the jumpers and figure out some of the DIP switches.

E1 connects to +5v through 10K resistor E2 connects to pin 1 of DRAM E3 connects to ground E4 connects to Pin 47 of TMS4501 E5 connects to ground E6 connects to Pin 46 of TMS4501 E7 connects to Pin 6 of U29 PAL and to A17 of Jr's bus (Address 16) E8 connects to ground E9 connects to Pin 45 of...

Got the memory part figured out... Have not figured out all the settings for the Clock/Calendar or the Parallel Port yet. 64K DRAM chips installed (total of 128K on sidecar): E1-E2 E3-E4 E5-E6 E7 E8-E9 E10 DIP 4: 1 DIP 5: 0 ---------------- 256K DRAM chips installed (total of 512K on...

I miss all the mom and pop and surplus stores. All of these have closed over the years: Tanner Electronics, Carrollton, TX BG Micro, Garland TX Computer Reset, Dallas, TX Electrotex, Dallas, TX Off The Shelf Components, Richardson, TX Electronic Parts Outlet, Richardson, TX Electronic Discount...

Not sure how many folks took you up on it, but I'm incredibly happy with mine :) Before powering it up, I did a bit of work: Drilled a new hole through the regulator's heatsink to mount it to the existing hole in the board. Replaced the regulator and attached it and the heatsink to the PCB...

Paul, THANK YOU for coming out to the show and taking pictures! Raymond

If they are NIB, they should be wrapped in plastic and protected. Even if not, at Computer Reset there was around 16 Apple II color composite monitors found out back of the building covered in leaves and trash for many years. Almost all of them displayed a raster and an image on the screen. :)

Computer Reset had zero e-waste spend. 37 dumpsters? Yes. An incredible amount of trash? Yes. E-waste in dumpsters? Oh heck no! There were scrappers that took the unwanted and sold it off to places that bought metals. Towards the end there was a company that came in and took out CRT tubes to...

Thanks! I downloaded those. I gave them the Prototyping Board Manual. I got it from the English gentleman that scanned the docs that the gentleman in Arizona owned and sent him. The seller was supposed to include 5x S6834 EPROMs, but did include some 1702 and 2708 EPROMs. I contacted him and...

I already had the blank PCB (EVK-100) and had a 3+ year struggle finding anything about it. I found a guy in his mid-80s at the time who had a web site that wasn't touched in 10 years. I emailed him and he had already sent his documentation to a guy in England. That guy gave me a copy of the...

I do.

Yoke connector solder joint cracked... Yoke connector burnt... bipolar cap went bad... bad solder on width inductor.... Those are the usual culprits.