Wow that's a good quality 3d scan compared to what I can get. Is it one of the handheld type scanners or a turntable one? It loo […]
iraito wrote on 2023-02-18, 15:29:
4: I got thanks to the kindness of acl a slot 1 mobo with a pentium 2, it's a non common form factor, so i'm planning to create a WIP thread and work on a 3d printable case for it, lucky me i work with professional 3d scanners and printers so i already have a 3d scan of the board to work with.
Wow that's a good quality 3d scan compared to what I can get. Is it one of the handheld type scanners or a turntable one? It looks like it handled scanning the reflective PCB really well, good luck with the case build 😀
A long time ago I plugged my Citizen VIDA-15B floppy drive from the Compaq LTE Lite 4/25E into a regular 26pin floppy cable and burned out the drive. That sucked.
So of course I had to convert my Compaq LTE Lite 4/25E to a direct drive floppy! The pinout is basically the same as the Compaq SLT's Citizen OSDA-53B pinout listed here.
I had to get familiar with what connection does what and verify all of the pinout which is basically the same:
Fitting a Teac FD05-HG in the bay works really well - 3 of the 4 screw holes match up with regular floppy drives so the drive sits properly without major modification. I had to trim down the eject peg so I didn't have to trim the case.
This took a while and after getting it all together, the drive didn't work? It didn't seem to do anything and I spent ages checking I had the lines right with the oscilloscope (shoulda used logic analyser but scope is easier for these quick checks). The original Citizen VIDA-15B drive just made the computer upset since I burned out some components on it plugging it into a flat cable connector that put 5v into its sensors and things, so that was rather useless for reference.
I also spent a really long time figuring out how the connections are done on the mainboard - some of them are exposed on the docking connector which really helped, but after it didn't work I was second guessing everything and was about to go back to the drawing board.
It turned out I didn't have any pins wrong, but the flat flex cable connector I'd wired it up for had the connector pins on the other side than what I soldered it up for, argh. These are all just salvaged from dead drives so it's tough to know what's what.
Once it was resoldered the drive has just worked! Considering the trouble that Citizen belted floppy drives have given me, a direct drive floppy on this LTE Lite is awesome. It predates PCMCIA so getting files on and off of it is otherwise a hassle.
Now the prototype works I can get some adapter PCBs made - it also means that a Gotek PCB could go in potentially.