Search results

I've build a FreHD and trying to connect it to my TRS-80 Model 1, but it's not working. Can someone with a working FreHD help? I'm made both, the FreHD and the Model 1 adapter. If you connect your FreHD to a power 5v power supply with the SD card inserted but without connecting the FreHD to...

I have a Japanese TRS-80 model 1 that I can't seem to boot from a floppy disk. I'm creating the floppy disks using a cassette input and Büssert's Bootstrap program. The creation of the disks seems to go through without errors. I've tried to write three different DOS programs on new disks...

I recently noticed that there are some serious voltage spikes when powering off my Commodore PET or my Commodore CBM 3040 disk drives. Both have similar linear power supplies. The 5v line jumps to about 17v, as shown below. This has me worried that it can damage some of the chips when the...

Hi All, I have a Commodore PET 2001N I'm trying to restore. I've created and put in the diagnostic ROM PetTeste2KV04 It's running on the diagnostics ROM PetTeste2KV04 found here. When I boot up, the diagnostic tool first displays the full character set, and that works fine. It then proceeds to...