Recent content by LeadedSolder

I've swapped to a '574 and things don't seem to have changed much, but there is an occasional inconsistency in the video test. I haven't had a chance today to sit down with it seriously; I suspect I was also having poor pin contact in one of the previous tests as one of the data-in pins was...

I had a couple minutes to do some more testing. Without this block of ram installed, the Confidence Test video is just a blank picture, so clearly something is happening in this mod board. The tiles that do get through almost seem to be a chopped up version of the Apple III it's trying to...

Hello all, Long time annoyance, first time contributor. As some of you may know, I have an early Apple III (128K; 12V RAM board) that has suffered at the teeny little hands of rodents. I've gotten the machine working but it appears that I have bad memory (quelle surprise.) El Problema As...

Nice find! Are you going to make a clone of this riser? It looks very straightforward but the dimensions can be tricky.

This used to work really well, but I haven't had it work for me in years, including this week. The rubber might just be too gunky by now. I'm dealing with a 40MB ProDrive that I unstuck a few years ago and has now become re-stuck, and I also managed to cam out one of the screws in the process...

This was the VISE installer and not the StuffIt one? I assume the A4/StuffIt installer is an earlier version.

Trying to open that on 7.1 complains that the Appearance extension is not installed, so it definitely seems to expect Mac OS 8 (I know you can install Appearance on prior versions, but... strong indicator.)

I agree, that seems most likely. There's probably a bunch of header nonsense before the SIT portion of the data fork and probably a bunch of footer junk after it. Could try putting a test file into StuffIt and also InstallerMaker and see if there's a common portion...

I ran the A4 utility on my System 7.1 Basilisk II install, and it produced a file named "°°HP Auto Setup Utility," which it ran on the subsequent startup and then left in the Trash. It's only 57k so I doubt it's the utility you want. Find File can't find anything else named "Utility" on my...

A pin vise drill bit is also a decent option if you have one, though it's annoying to line it up and clean the wrecked copper around it sometimes. I have done that technique before as well.

Yeah those vias under the "L" in "L3" look corroded! Personally, I usually use an Olfa knife to scrape off the solder mask, but I know others use a fibreglass pencil. It's never done anything for me but make itchy dust, but it might be a technique thing. After that you'll want to clear the...

Yeah, that should be fine. LC SCSI is super slow so it's not like you have to worry too much about matching trace lengths or anything... I suspect plugging the via will take care of things. Good luck!

From the name, I think this is one of the data lines, so it makes sense that you're just getting mangled garbage back from the hard drive when you query for ID strings. But then how is the internal SCSI drive still working? Edit: Sorry, I misread the initial post. The trace is broken to the...

How's the continuity from your SCSI controller IC to the port itself? I had a lot of trace damage around mine on my LC I from a big electrolytic cap stuck to the top of the controller leaking.

Full disclosure: I'm making this post without looking at any actual sources and being a little sleep-deprived. My wild guess is that you can get away with it on a CPU card because the CPU card controls the bus (the CPU kill line is asserted, which makes the original CPU essentially "go to...