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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...

I did a stupid thing and fired one of the little black wave washers that clamp down the bottom slider of the floppy drive into low earth orbit. So far, I haven't been able to find it, despite having a pretty good idea of where it flew off to. It's a Sony MFD-F75W. It's these guys: Does anyone...

That’s very exciting news! Looking forward to building my own board stack one day.

This is excellent, I'll take a look once I start delving into this. I haven't done the "input" side yet, only some simple test patterns on the output.

For custom clocks, there’s also Clock in a Can: https://github.com/schlae/ClockInACan Edit: Unfortunately, I think the oscillator IC on it is not available anymore. Sigh. Maybe there’s a replacement or the fundamental design could be built into the board? I am also starting on a project to do...

That is a massive display. Poor 4400 having to hold all those pixels up.

That's a neat-looking machine. So much diversity in 80s Japanese word processors. If you have any system or application disks, it would be helpful to image them now before they get bad. I just finished up imaging some for a competitor, an NEC 文豪mini5.

I would guess it’s a short and the multimeter is just reading those lines as they collapse from the power supply protection circuit kicking? What is the resistance like between 5V/12V and ground? If it’s really really low at least we know which rail may be the one that has a bad part on it.

The MSX Rookie Drive uses a part called a CH376 that seems to be meant to make it easy for microcontrollers to read off USB sticks. That data sheet could be a good place to start?

Who do you use for sockets, so I can buy stock in them? Good luck with the bring-up!

This is a fantastic achievement; lots of hard work involved so far!