Recent content by dabone

You also need to triple check all of the previous repairs with a meter to make sure you don't have any broken or bridged traces. And check all connections using the schematics.

And a relevant post here. https://www.lemon64.com/forum/viewtopic.php?t=76213

Any now you know that it's not a bad ram chip. Looking at Ray Carlsen's site, U17 (74ls373) can also cause a Garbled Screen. And looking here.. https://retrorepairsandrefurbs.com/2021/05/18/commodore-c128-board-repairs/ Shows u17 controls char rom access..

Do the swap between ram banks like the video above shows, completely swaps banks 0 and 1, and then you may be able to see what's going on. It's just lifting one side of 2 resistors and running 2 small wires.

You can also swap the ram banks using the resistor trick shown in this video.

The sprdef command is just a text mode 40 col program. Try this program, it will draw a X sprite near the center of the screen and move it horizontally across the screen to the right.

Are you able to run some sprite commands in 128 mode? What do the sprites look like? Are they corrupted?

RGBtoHDMI. One of these with the TTL board can handle CGA/EGA/MDA(Hercules) to HDMI. That way you can play with more video cards/modes/computers without having to buy more adapters.

What was it in? You can get an idea of what address pins were in use.

I've never even plugged it in, it's stored under my bed.

That card doesn't have any ram, it uses the IIe's Ram. There were a lot of clones. https://mirrors.apple2.org.za/Apple%20II%20Documentation%20Project/Interface%20Cards/Z80%20Cards/ Including a brand new one that's much faster that's available to buy now.

Did you mod the wimodem to run on the pet? https://www.cbmstuff.com/forum/showthread.php?tid=839

I used a rom splitter that ran under a st emulator, I just booted it, then used the splitter on the 104us.img and selected 6 roms. I actually used 6 27c512s and doubled up the rom per chip. I'm sending you a PM

I just used a RPD-60A as a replacement for an Atari St power supply. I love my meanwells.

I forgot to show off my printer/typewriter. Apparently a OLYMPIA ESW-103, with a IEEE-488 thrown in.