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Figured as much, oh well. I did some experimenting this weekend and checked the track 0 sensor on the drive. I tested for continuity on it when the switch was pressed, and it seemed fine to me. I don't know if it's that my drive is a later revision or not, but the colored part that actually...

Welp, I guess that's what I'll have to end up doing. I don't suppose there's a way to bring bad chips back to life? 😅 7 4164 chips in bank 3 are not functional.

That helped a bunch! I was able to diagnose that 7 chips (out of both banks 2 and 3) were bad. I was able to find enough that were good to fully populate bank 2. Bank 3 however is now almost completely full of bad ram.. Have a good break! Hopefully things will be sorted out by the time you're back.

Gotcha, that makes sense, I think I get it now. Thank you for the explanation :) In other news.. I pulled and reseated the RAM in bank 2 multiple times, then tried swapping the RAM from bank 3 to bank 2 and vice versa, neither solution caused the memory in bank 2 to be counted during the...

I'll be honest, the majority of electrical knowledge I have is mostly just stuff I've learned from family, the internet, and reading. I've had very little formal training (finishing general education to work on obtaining a degree in electrical engineering). I also didn't think much about how...

I plan on giving all of these a try, I mostly focused on getting DOS installed to the CF card yesterday. I'll respond to each post individually as I troubleshoot and give you the results, I just don't want it to seem like I'm overlooking them. Just read through this, did not know that about the...

It seems my chip puller is missing. I have a new one arriving in the mail today, I'll go ahead and give that a try as soon as it arrives. I did notice a few of the chips were slightly out of their sockets (mostly just banks 1 and 0), I pushed them back in with no change. Hopefully it's just a...

I'll respond to this first since it's where I made the most "groundbreaking" discovery. I ran the head moving program (this time making sure to read the instructions and change the the lines in the code to use A: instead of B: ) and I got the head to move. Immediately I noticed a very glaring...

I'm the type who will skim over it but overlook things and have a meltdown when things "mysteriously" don't work. I'll admit it 😅. It's the San Diego way. Sorry to waste your time. I originally had the XT-CF-Lite set to start at CA000 when the hard drive and its controller were installed. I...

Just saw that, I guess that goes to show me a little bit of reading goes a long way😅. I'll modify it, give it a try and report back.

Oh! I knew I forgot to mention something very important! I gave all three BASIC programs on your site a try (the crude register, turning the led and spindle on, and the head moving command). Attempting to move the heads using the program resulted in zero movement from the heads. I tried moving...

I've attached a photo of my splash screen. However, I just read your last message: No it does not.. I think you may have found my issue.. 😅 it's got 128kb fitted. That's definitely a good push in the right direction though, thank you for that! I've got an AST Six Pack memory expansion board...

I'm so sorry! 😂 major typo. Yes, I have a XT-CF as well as a 512 MB CF card with FreeDOS installed on it which are both known working in an IBM AT. I've got Sergey's XT-CF-Lite V4.1 to be more specific. I get to the splash banner, where it detects the CF card and displays the make and model...

I also just tried my IBM Exploring the PC AT disk which produced a "Disk Boot failure" error.

New development!!! I inserted an IBM AT System Diagnostic disk just for funsies, and to my surprise, I got something new! I got the message: "Bad or missing Command Interpreter" It's not a great message but it's definitely trying to read the disk!

Yep! that's the one. I will certainly give it a try! I don't have any 1.44M drives handy at the moment, but I'll go out to my local e-waste place when I get the chance and do some scavenging! I see. For clarification, would the standard stock floppy controller of an IBM 5170 be capable of...

I'm a bit confused by the question, it's a compact flash-card as well as an XT-CF-Lite card to be a bit more specific. The only other computer I've tested it in is my IBM AT and it works completely fine.

Hmm, I've got the two one slot drives, another controller, and some other cables (all known working) in my AT. I'll give them a try tomorrow and see how it goes. Someone on Reddit suggested Imagedisk, I'll definitely give it a go if I manage to get the drive working with my known working parts...

I unfortunately don't have any blank 5.25 disks to attempt to write anything to. Even if I did, I have no readable OS on the computer. My known working XT-CF card hangs while attempting to boot into the FreeDOS CF I have written. But I'm fairly certain that's another issue. 😞 I was scared of...

Hi all, I've got a Tandon TM100-2 in my IBM XT, that works mechanically fine (spindle spins, head moves at startup, LED flashes, no 601 error), but it won't ever read any disks I attempt to insert. I've tried an official PC DOS 3.3 floppy (which works fine in my AT), as well as an unofficial DOS...