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What is this? Post Photos of Mystery Items Here (vintage computers only)

Eudimorphodon said:
The color of that board definitely looks like a product from “Solid State Music”, an early S100 vendor:

S100 Computers - Solid State Music History

S100 Computers
www.s100computers.com

The picture doesn’t match anything on this site, but maybe it’s an earlier version of something like the IO4 board.
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Based on the article linked below it's most likely a Solid State Music IO-2 board...

A Debug Board for the S-100 Bus

Details on my S-100 debug board. This board is the result of much testing (and fixing) with my original debug board, which was far less thought out. An essential device for low-level debugging without a front panel, especially if you've got a CPU card that may or may not be working!
users.glitchwrks.com
 
Deeper6 said:
First post for the new guy! I recently received a IMSAI 8080 from my late uncle. With 0 documentation, of course. I am hoping to learn something about the Keytronic keyboard. The pcb has markings KTC 65-0391-01 on it, a 25pin serial, in a nice case, and it's blue. I did a search here and the web with no results.
Thanks in advance!
Click to expand...
Wait a minute, I remember you from the workshop! How did debugging go?
 
I'm trying to make sense of this floppy drive. According to The Internet the NEC FD1138H is a standard 1.44mb floppy drive. But this specific unit appears to have a narrower than usual ribbon cable. I don't understand.

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So I had originally brought this in from the garage to kill two birds with one stone. I was going to remove the 3.5" floppy and use it in a build, then use the bay adapter for another purpose in the build.

Unfortunately, it looks like this device requires that bay adapter to adapt the 26 pin to 34 pin. So if I want to be able to use it, I have to keep it intact. Sucks too because its a really nice, well-built bay adapter.
 
hunterjwizzard said:
So I had originally brought this in from the garage to kill two birds with one stone. I was going to remove the 3.5" floppy and use it in a build, then use the bay adapter for another purpose in the build.

Unfortunately, it looks like this device requires that bay adapter to adapt the 26 pin to 34 pin. So if I want to be able to use it, I have to keep it intact. Sucks too because its a really nice, well-built bay adapter.
Click to expand...

I have a Schneider Euro PC that uses 3 1/2 floppy drive (720k) that has a smaller than usual cable too and no separate power connector, maybe this were custom made by manufacturers where the interface is adapted to suit OEM needs ?
I dont recall the brand of the drive of my Euro PC
 
Previous threads about 26-pin 3.5" floppy drives:

H

Thread 'Non-standard Citizen 26-pin floppy drives'

I am the proud owner of a new Toshiba T3100SX, which is almost (but not quite) not working.

One of the things which is almost but not quite not working is the floppy drive, which is behaving as if one head is broken: if I format a disk with it, every sector with head 0 works, while every sector with head 1 doesn't.

First question: does this ring a bell? Does it sound fixable?

The drive itself is a Citizen unit with a 26-pin connector. This appears to be ancient and obsolete but relatively standard. The maintenance manual has the pinout, which matches this...

P

Thread 'Tandy 1500HD/2810/3810HD Laptop 26-Pin FPC Floppy Drive Ribbon Cable'

Does anyone know if the 26 connector FPC floppy drive ribbon cable pinout for the Tandy 1500HD/2810/3810HD laptops is known? Or if it is a common standard?

I've come across a number of 34-pin + floppy power connector to 26 connector FPC floppy drive cable adapters and want to find out if that would allow me to adapt a 34-pin servo type floppy to use with the 1500HD I have.

The floppy drive in question is a Matsushita EME-263MG. The 26 connector FPC cable is permanently attached to the drive (seems kinda like a stupid design given how prone FPC cable are to various problems...). I...
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Thread '26 Pin Floppy Drives'

Picked up a couple of 3.5" FDD drives, and didn't notice until later they have 26 pins instead of the usual 34. Read some posts here in the forum about adapting a 26 pin cable to a standard 34 pin drive, and even see some ready made adapters online.

Has anyone ever tried the opposite?

Also, what native systems were these created for? I'm seeing older Toshiba/Sony laptops. Anything else?

Considering the number of 26-to-34 adapter postings, are these drives unicorns?
 
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