Recent content by KennyPowers

Exactly what I was thinking, though I know not everyone has the tools and ability to replace a 96 pin connector. If the missing pin is a redundant ground pin, then it's probably not the cause of your problem @macaphod. You never actually said what the problem with your Cube is though...

You mean the backplane that the mainboard and power supply plug into? Contact Rob Blessin. If anyone has a spare for sale, it's him. He doesn't post here frequently, so you might have more luck registering at https://www.nextcomputers.org/forums and messaging him there.

I have all of those things but #4 at the moment. However, the excerpt you posted from the LC Dev Note suggests to me that it works in the same rudimentary way that sound works on an Apple II. On an Apple II, each time you access memory location 0xC030, the position of the speaker is inverted...

I wouldn't think that would be a problem, but is your board socketed? Mine isn't, but I know some Cube boards were.

It's a 4-layer board, where the two internal layers are likely power and ground and the two external layers contain the signal traces that you can see. Pin 7 is connected to the ground layer, and pin 14 is connected to the power layer. The two decoupling capacitors C1 and C2 are also connected...

No, pins 1, 2, 3, 4, 7, and 14 are all used (look at the back of the board). It doesn't make sense to use pin 1 without pin 2 or pin 3 without pin 4 as 2 & 4 are the outputs for 1 & 3: On this board, pins 1 and 3 are both connected to pin B7 of the male PDS connector that plugs in to the...

Kai appears to be correct here. I can't see or access the other row of pads that I suspect is under U2, but I'm certain that's what those visible pads are for. The pinouts of the DIP and SOIC versions of the 74F04 are identical: https://www.mouser.com/catalog/specsheets/74F04.pdf Just like...

These?

Interesting. The hole pattern doesn't match the placement of the screws that hold the two halves of a MacCharlie together, and even if they did, directly screwing a MacCharlie to the side using the existing holes seems impractical (screws would have to go through from the inside of the Mac's...

Ya, I'm not going to let this one be the guinea pig 😳 Do you remember the part #'s of the ROMs on the mainboard?

The keyboard extension doesn't have a ROM in it, but it does have a P8748H microcontroller in it as pictured in this post above. I don't know if there's a way to dump the microcontroller's programming: Here's a picture of my MacCharlie's mainboard. As you can see, I have V3 of the Charlie...

Thank you! That video was very helpful! I just wanted the Mac and MacCharlie to line up properly, and I think I worked out that the Mac needed to be raised 16mm to make that happen. So, I just printed four quick-and-dirty risers for the Mac's feet to sit on: My printer isn't big enough to...

I don't have the bottom tray, but I 3D printed some risers for under the Mac's feet to raise it to the same height it would be at if sitting on the tray. That's why the Mac and MacCharlie line up vertically in my picture. When you have the tray, I believe the MacCharlie unit itself is still...

Here's the whole enchilada running Hitchhiker's Guide to the Galaxy from the B drive: Also, I love this cheeky error message:

Thanks! I'd already found the software here and got it booting into DOS 3.10, but it looks like you have a couple things that site doesn't have (y) I've been working on replacing the bad key switches in the keyboard extension, and the TLDR is that I was eventually successful. The PCB is...