Recent content by GreenBar0n

If I had to guess what's making the video do that, UG7 stands out as having been replaced. I know the PAL dumps are available, might be worth a try to recreate UG7 to see if that helps. https://github.com/TheRealBolle/SE30/tree/main/PALs

Nice work finding the bridge! EDIT: I had thought the bodge wire at UF8 was incorrect, but looking close I can see Pin 6 is correctly attached to Pin 13. That is strange that the simasima pattern is moving. Have you already toned out all of the Data lines from UE10 and the CPU to the ROM slot?

Could it be possible that the short is not actually at the CPU, but somewhere else that D28, 29 and 30 meet? The Data Pin Matrix lists a few places where those Data lines are closely located to each other on the legs of chips, might be worth checking in these locations for a bridge, or errant...

Glad to hear you're enjoying the process, I was actually a bit sad when mine was finally fixed, was the end of the challenge, made me want to fix another. Sounds like a good idea to send the worst SE/30 board out to be Reloaded and do the work yourself on the board shown above, I think that...

In the first season, first episode of Seinfeld, there was no Mac, but in episode 2 of season 1, here is the first scene of one ever shown, it's the SE M5011:

Since this is the Compact Macs forum, only Compact Macs qualify for this thread. Macintosh Plus: Thanks to @Ron's Computer Videos for this one.

That board looks repairable - to me, I would remove the battery holder though and look under there, if there was a leak and damage. The secret to getting rid of bridged pins, imo, is good flux, it makes the solder cling to the legs/pads and not bridge as badly. If you're enjoying the process...

This episode has been out for about a year, I'm a bit late on this, but was watching Black Mirror on Netflix Season 7 Episode 6, the last episode of the season, called: USS Callister Into Infinity - and a Macintosh Classic was featured prominently. Was surprised to see it, wondered if anyone...

Regarding the Mobius not working: looks like you have the 25MHz version and according to Page 7 of the manual listed above, I'd guess you're having a memory issue. The manual says you need to have all the same size and type SIMM modules, it looks like you have two different types in there. Maybe...

Looks like the Mobius 030 without the FPU - found halfway down this page: https://www.savagetaylor.com/2022/06/07/68k-accelerators-fpus-and-other-cpus/ From the above link: MU 1993.06 (photo) Pinouts Mobius 030: SE, Classic (25, 33MHz, opt FPU, 16MB) by Mobius Technologies Inc., Emeryville CA...

Using a cheap DMM with the Frequency Counter function, where there is no adjustable settings like an O-scope, you'll still get 1.305MHz at A(2). The Guide never mentions how to setup the scope. Either way it's confusing to a new user that has no idea what a working SE/30 board is supposed to...

Regarding only getting 1.305MHz at A(2) Pin 4 - when the ROM is removed: I think the Simasima Repair Guide was stating what the Frequency Target should be for each Address line with the ROM inserted, or as as a perfectly functioning Logic Board; yet when running the CPU/Walk the Bus Test, they...

From the Simasima Repair Guide: 1. After initial power-on, and the voltages stabilize, the sound chip releases the reset line 2. The CPU begins executing code 3. The GLUE logic maps the ROM to the start of the address space (address $0) 4. The CPU begins executing code from the ROM SIMM using...

I've found that making emphatic statements like "missing any Data line will cause a simasimac condition" tends to get a correction faster than asking the question: what Data lines can be missing and still work? I could ask the question: what Address lines could be broken to cause a simasimac...

Congrats and nice work, @Mark_W! A battery bombed board is serious work to recover from. I hadn't thought about the fact that I was also testing continuity from the PDS slot and not the CPU socket, initially, as the PDS is recommended in the Simasima Repair Guide for easier access; that must be...