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Well, I like @JDW 's answer better. It really wasn't very exciting, unfortunately. NASA has never been what it was in the 60s since then. I worked there from 84 to 87 in Space Shuttle Payload Integration. Which sounds kind of cool. Get the payloads connected and ready, right? Except...

I don't really have time to sort out the whole diagram, but hopefully clarification/confirmation will be in the following details. First of all, on a 72-pin SIMM, 32 bits/4bytes are addressed at a time. So each address provides 32bit or 4 bytes of storage capacity. Address lines are...

Never mind. It turns out the Dataman 48Pro2C will do the trick and we have one at my work. Some days I get lucky.

The big issue is that the HC05 doesn't seem to be available with the necessary 368 bytes of RAM. One could substitute the 9S08 (HC08 successor) because the HC08 was backward compatible with the HC05, thus simplifying the software port. But the 9S08 has a very different pinout from the HC05...

When I worked at NASA we had a ~1" thick acronym dictionary which was pretty much a necessity in order to function well. And it was out of print... You had to wait for someone to retire and then hope you could steal theirs.

If you remember my old tantalum capacitor thread on 68kmla, going back to 2007, I added the Bourns filters in 2012. I still have a bunch of them. But shipping a few at a time to folks who don't need anything else is barely worth the effort at this point. Of course, the original purpose was...

Anyone have a chip programmer that will program the Cypress CY2292F Clock Generator? I checked the device list for the two I have and it's not on there. Needham EMP-30. XGecu IL866II Plus. According to the datasheet you need a Cypress CY3670 with CY3095 adapter, but those items appear to...

Thank you. Work heated up again. Plus various aspects of life. I'm dead in the water on extraneous projects again. Just mentioning in case anyone was anticipating me ever actually finishing the project. I hope to pick things up again, but not any time soon.

Been away/busy for several months. There is/was a 64MB composite SIMM by HP, 72 pin, that could be useful. It won't get you to 80, but would be a simple way to provide 64 + 4 and only modify the LCIII to the extent of running the RAS lines. This HP SIMM has 4 banks of 16 on board but uses...

Been away for a while but this item seems to still be available. Thank you. However it's about 2200 dollars. I don't want it that much. At least not this year. Maybe later...

Unfortunately not. The SWIM chip is an actual logic chip, not a memory or storage chip. It is not the kind of thing that can be copied and programmed into another blank chip. That said, if someone does a lot of hard work and figures out the logic going on inside the SWIM, it might be...

And when soldering while using magnification keep in mind that your depth perception may be hosed, unless you like the sound of your nose grease sizzling. Just call me Stripes.

Nice. I have a couple of MicroAsantePrints, so I really don't need one, but I'm tempted anyway. New... Shrink wrapped.... Pretty box...

Excellent. Doesn't ship to the USA, but I entered the Item title in the USA Ebay site, and received a dizzying array of results. The exact one you got is available. But then, there are all the other results...

What kind of microscope do you have? We have this white stereoscope at work and I can never remember the name. Nautilaus or Unicorn or Hydra or something. They're fairly pricey though.

That sounds like the direction to go. The question is would Zane rather rig up the hand programmer and program his chips locally, albeit a little tediously, or would he rather ship them back and forth to me (if I can get the DOS software going).

TechKnight posted about rebuilding flybacks either here or on 68kmla. Apparently, even after you get the coils properly wound, which is a major undertaking by itself, there's some process of dipping teh transformer in a pot of hot something or other, sealant or soemthing like that to drive...

The laptop is running WinXP. Is "restart in MS-DOS mode" available in XP? I'll copy the DOS files to a folder on the HD. There's a bunch of stuff about .ini file configuration that I really hope I don't need to know. I'm not at home at the moment, but I could post the DOS folder here...

According to the Device List I found on line, my Needham EMP-30 supports a Phillips and a Signetics 82S123, if I run the DOS software. I'd straight up offer to program the chips for you when you get to that point, but I've never loaded or run the DOS version of the software -- never needed to...

Well, I was assuming that 514256 chip south of the DP83902 was a static RAM, but sure enough, it's a dynamic RAM, so I guess that Asante chip must be at least acting as a memory controller. Except, the large chip on the left is an 80C188 processor, which is a 16 bit processor and I found...