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Given that the corruption shows up in my screenshot, would the data lines be D[31:0], or are you talking about the PD[31:0]?

OK, so I did some probing with the Q800 schematics and checked some additional things. I have been focused on anything related to D28/D29. For PDf[28] and PDf[29] and PD[28] and PD[29]: Starting at U8, the connection from 60 and 56 to RC4 15 and 19 are good. The resistance across RC4 pins...

Ok, having the schematics for the actual wombat board should help me. I was trying to make educated guesses translating from the LC475 schematics and I don’t think I was making the right assumptions. I’ll take a look at this one.

I didn’t think about doing screenshot. I assumed it was something on the output side. Since the lines show up in the screenshot, this means it’s between the CPU and the vram (or the vram itself)? Also, after checking some of the traces last night and not finding anything, I started to suspect...

I traced the PD[28] and PD[29] to the VRAM. all looks good - it does have a resistor inline, but that also seems ok. @joevt is D29 / D28 different than the PD28 and PD29 I looked at?

Ok, as I was looking at the traces in that area, I realized there was another chip that wasn’t populated on the board, U3, right by the video output. I was hoping that was the cause of the problem. I grabbed it off of my spare board and started it up again but the video was still bad, although...

It was set to 256 colors. I did change it to thousands of colors and to grayscale to see it if got better, but it didn’t seem to. I didn’t think to change it to B&W, but I’ll do that tonight and see how it looks.

The 650 definitely wouldn’t boot with two of the F245s removed! I’ll try to run through the traces tonight. Thanks!

I’ve ordered your existing 3d parts from JLCPCB in their white resin. I’m planning on using the 8” screen I found on Amazon that appears to be the correct model. I plan on trying to set up my UsB C trigger board to request 15v and then try to find a spot to drop in a buck converted to drop the...

Awesome. I’ll take a look at that and see if maybe there is an issue with any of the traces. Would a bad on board memory chip cause this behavior? I have a couple dead boards that I could swap in chips from. Alternatively, would it work if I removed all 4 chips from the board and just used...

So, I’ve been working on a few of the last of the machines I picked up late last year. One of them was a battery bombed 650 that had a damaged SIMM slot. Unfortunately, I think I used too much heat and damaged some traces trying to remove that 72 pin socket. I did finally get it out, and...

1. I wasn’t able to find it on Amazon initially using the model number. However, I did find this, and looking at the pictures, it appears it may be the S801H model: https://a.co/d/8AiiaSv 2. I forgot the maceffects IIc case was translucent and not transparent like the SE case. Although given...

This screen, mounted on a clear IIc case, with the 3d parts printed in clear resin would be incredible looking. @JDW, I feel like it would make for a good video. Make a go fund me link and I would contribute to see that happen on your channel.

I thought I included the BeOSTools image in that macintosh garden upload. But it seems the garden is down at the moment. Alternmatively, you could get the BeOS partition from the garden link, and it looks like there is a preloaded 7.6 image with the BeOS tools (OS chooser and BeOS launchers)...

I didn’t think you would be able to see the BeOS drive from in MacOS. You should run the BeOS launcher to restart and mount the BeOS drive and boot to it.

I never knew this was possible But now that I do, I think it would be really cool to run MacOS on my NeXT Station. So, it seems this requires an external box that connects to the DSP port and has an LC ROM in it. It was called the DayDream. Any chance someone has one of these and could...

So, I have finally started trying to salvage the LC form factor machines from my shop haul last December. I was able to get two boards that weren't destroyed by the battery or flooding. Unfortunately, neither would initially boot. On the first, I was looking over the board after my recap, and...

So, I replaced the DFAC and the sound was back... until it wasn't. The only change was the power supply. So I tested the voltages and they matched. Now I think I assume I'm going crazy, so I switch back and forth the power supplies and I get inconsistent results. I think maybe it's another...

Another minor update. I moved on to assessing the Quadra / Centris 610 machines. While it looks like I had 13 of these machines, I think I'll only get 5 or 6 working machines out of them. However, as I was opening up the machines, I ran across one of the machines I photo'd as a "lowlight" of...

Is that 3D printed? I feel like it's painted, but then I also am trying to figure out what's going on with the bevel on the bottom lip of the floppy opening!