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So you have the Type 1 with the piggy back ram chips :-( I'm assuming it has the stock IBM bios, Can you burn your own Eproms if required ?, Do...

It is interesting the liberties some designers took with the power supply to the MC1488. In the Votrax TNT for example, they powered it from +12V and...

I grabbed it. will be archiving disk and manual on arrival

Looks like a ST-506 to sasi board. I think I used to have one, but I don't remember out of what.. Might have been a eagle computer? edit.. (I...

Could you not use a Tapduino? I thought the tape drive on a PET was the same interface as a Vic20?

it is an early OMTI Model 2001 MFM to SASI controller

What sort of failure or problem are you getting? What does libdsk expect for a raw image, and what disk geometry did you give it? Also, each track in...

Yeah. Oldskool 10mbit AUI+BNC though, not one of the newer 100mbit twisted pair cards. It was a neat machine, other than being kinda ratty. I'd...

It’s in a box marked SASI-HDC. Googling SASI suggests it was a predecessor for SCSI. What would this card be for?

Didn't that one have an ethernet card also?

They can leak pretty bad ... I have a couple of quadboards with bad traces due to battery leakage. The traces are very fine on these boards and it...

It's interesting that I can't get "k10u-rld-h.raw" or "k10u-rld-h-fmt.raw" to write an image with libdsk's dsktrans, SAMDISK, or BIN2IMD. Nothing...

Thank you Doug!!! I am obviously blind. :-( Now that you pointed out the horizontal jumpers I wonder how I missed them. I prefer the M8650...

The stepper motor never moved under its own power. It was free to move when I turned the spindle with pliers. I was able to "force-step" it with...

PM sent

For what it's worth--and I don't know if it has any bearing on your issue--I find that NOS DSHD 5.25" floppies tend to not format up as well as DSDD...

I’ve got an extra WD1002S-WX2. It’s got a wide bracket so it might be for 5150 or an early clone.

I have a couple of boards I can send with some RAM if you want for $100, I'll see which ones I have that have 3.3V support. I have one on eBay here...

Excuse me while I indulge is some massive hand-wavy simplistic statements :) I think there are 2 reasons that the TRS-IO uses an ESP32: 1)...

Unfortunately, I do not have another 1.2MB drive. And yes, this is a recent acquisition that I'm testing out the first time. I'll see if I can grab...

The latter could be the case. My XT clones have the Omnibridge and DTK Mini-micro boards; the former is WD37C65-based, the latter 8473.

*coughs softly* The nicad bomb looked like it leaked a bit in the pictures, but hopefully I can fix it. Paid too much, but I have been looking...

Ok. Yeah I think these caps may be different brands and thus may not be the same. I don't see the usual capacitor 'cheese coming out the tops where...

It's not CP/M 3, but it is possible to port CP/M 2.2 to banked-RAM systems and get a 61+kB TPA. I've done this for the NC200. The BIOS bank manually...

Hi Greg, You need to be a little bit careful with what you are looking at on a scope / logic analyser. You need to know what is happening on the...