Recent content by Bolle

Looks like those have a 500mil spacing between both rows. The sockets that were originally used have 400mil spacing. There's not going to be enough space to fit those I'm afraid. But it looks like there are also dual row sockets with tighter 300mil spacing. Those could be made to fit additional...

I don't think a 33MHz GAL based model exists. With the speedbump they also redesigned the whole thing and funneled all the logic into those two gate arrays.

Exact value doesn't matter on those. If I remember right the JLCPCB BOM lists whatever part was in stock (and a basic part whenever possible) at the time the file was made. It might be a good idea look at JLCs stock and compare if there's another option right now (as in cheaper, in stock...

There are no video signals present on the edge connector. It's only three VIA pins (one of them used to put the machine into test mode) and one of the serial ports (for the test equipment to communicate with the board). Also obviously power/ground as you already figured out.

Looking through my mouser history it seems I have ordered 38-HX5F12.5-32.768KHz before and they again seem to be fine as drop in replacements.

I have used these before as drop in replacements: ABLS-16.9344MHZ-B4-T The load capacitance doesn't match the original either but it has always worked fine for me so far (on both original logicboards that needed the crystal replaced because it got eaten by cap fluid, or when building SE/30 and...

On a reloaded board you can just go for ISSI IS61C256AL in SOJ-28 which is still in production. I made the pads for the SRAM large enough to take both, SOJ and the original wide SO footprint.

Still depends on the machine and upgrade type, they're not all the same. On the one shown above it's obvious as the original CPU comes out for the upgrade to drop in. Some machines that use adapters that go into the CPU socket and present a IIci style slot for an accelerator move the logicboard...

Ha, alright. I wondered if the word on the JLC blooper already was spread or not because I didn't find anything in one of the group buy threads yet. Good to know everyone is informed already(y) I'm still kind of curious if it's all boards that they messed up.

Check if you've got BAS40-04 instead of BAS40-06 diodes installed on the bottom of the board for D4 to D19.

Those stripes are the default contents of the VRAM. (depending on the vendor of the VRAM the default contents can also be thick horizontal stripes - yours are the thin variant - or gray background with vertical lines of garbage that are 1 pixel in width) What that means is that the board didn't...

This. Those clock doublers for 030 machines massage /DSACK, /STERM and /CBACK to get things working. You'll also need software patches to get sound and floppy working again because those rely on specific timing variables. Can't speak for the Sonnet upgrade, but on the clock Doubler made by Dove...

This way around isn't as fatal as putting IIci cards into an SE/30 slot though. While both directions will totally not work at all a IIci card in an SE/30 slot will be damaged because the SE/30 slot has 12V present in places where only 5 logic level signals should go. Putting an SE/30 card into...

To be honest... I went for that license because everyone else seems to use it as well. I don't have the time and I don't want to deal with any of that licensing stuff at all. There's already someone on eBay in Germany commercially selling unpopulated boards (they do have a lot of other boards...

+1 on applying new thermal paste. Also check if the Peltier is actually good. Also there's a fan attached to the back of the power supply assembly so it sits right on top of the CPU heatsink once the board is installed in the machine. Make sure that fan is running.