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That is probably the keyboard doing a self test after receiving +5V.

Take a look through the XT compatible memory cards at here]. Having a very quick look there, I see that the AST Rampage! (as an example) offers both...

As I don't have any eisa boards anymore my PCD-5t is the desktop version with only PCI and ISA boards. Can you please post the eisa config file...

Now that sounds like something I can do. That would be compatible with the A2000 also, correct? I'll definitely look into that, I don't really...

I think I have to set the sector size in the SCSI2SD to 256bytes. Will try this the next free time slot.

Boot your CP/M Version and execute the following commands. Post the settings you find. STAT DSK: STAT A: DSK: STAT B: DSK: Larry

Yes all pots have been cleaned. I might have a clue about the power though. The B+ voltage is 14.7 when the monitor first comes on and is working,...

This site: http://oldcomputers.dyndns.org/public/pub/cdrom/oak.oakland.edu/cpm/zmodem/index.html has an Overlay for the TRS-80 Model 4 & 4P that...

Thx a lot ... that's where I found it in the end, and that's where I found out that you need to use CTRL-ALT-INSERT into get into the built in cmos...

Have you verified the programming of the PIC? "Keyboard bad" error says that it's not responding.

yup, i already ordered a PS/2 to XT/PC keyboard converter. I may end up getting a (third) XT-IDE for this machine, but that takes one of the two...

I don't think this will be an easy repair and would need more effort than I can justify at the moment. Maybe I will get back to it again one day....

As you said QEdit isn't exactly a word processor but it seems to work great for quick write-ups. By far my favorite feature in QEdit is the ability...

The problem you are going to run into is the UART for the Model 4P is U33 TR1865 UART 8040865 U73 BR1943 Clock Generator and none...

Not necessarily. It should be possible to figure out the frequency of the leader and the frequency of the signal shifts and whether or not stop bits...

Sure. I think I know how to fix that. I'm working to install CJL's revision "H" drivers on SIMH. I believe that driver will still crash the...

Wouldn't you need to know for which computer these are for in order to convert them to binary? But if he knew that, this thread wouldn't exist.

What do you use for a dummy load?

Honestly, you should convert these in to binary and start throwing disassemblers at them. You should try a 6502 disassembler and a Z80 disassembler....

Beautiful work!

I uploaded some drive pictures to http://bitsavers.org/pdf/samsung/floppy/SFD-321B/ They appear to have dropped the shrouded connector when the...

As far as know there are two current IOT1 versions available: The original (IOT1.JED which can still be downloaded from Bob's Spare Time Gimzos...

>>> Don't I just issue the 6410 IOT which takes the contents of ACC and pokes that out on the data bus. Yes, but the signal will only be active...