Recent content by brijohn

I finally got my own build of the UD-80 working. I had a little trouble initially since the first 6803 I tried seem to be either bad or fake, but after popping it out and replacing it with another things started working correctly. I still need to make the cable for connecting it to my PX-8, but...

This is pretty neat. Back when we were trying to figure out how the heck NABU disk images worked i had manually patched a few of sector based disk images to overwrite the default (osborne) DPB that was used if no out-of-band information was found and was able to get them working that way. But...

Oh that's interesting. I only have one hdd attached to my current QX-16 so i wasn't aware that there are issues with more then two. The code I recovered i have posted to archive.org and can be downloaded here. It appears to be complete and capable of producing a bootable disk. though i have...

To be clear you don't need a DOS machine to use the IMD tools for conversion, though you certainly could do this on one if you really want to. I use dosbox, which is a dos emulator, and can run dos programs on your current modern OS. This makes it fairly easy to use the IMD tools without needing...

I have one of my QX-10s setup with gotek and it works fine. While I made my own FF.CFG and IMG.CFG files I believe they are basically the same as Scott's, I'd have to check later to be sure but the ones you posted seem sane. As for converting TD0 files into IMD i have never tried using the...

The driver is specific to MS-DOS, the for CP/M both Scott and me have created modified disk images that have been updated to support CF cards instead of MFM drives. One differences in my CP/M images though is that they have been modified to use LBA addressing instead of CHS which better supports...

Oh nice. I knew that semidisk had made a QX-10 variant, but i had never seen one before. I own an IBM-PC and S-100 variant of this card. One of my QX-10 disks I've collected had a copy of the semidisk driver program and part of the source code, It was missing the actual QX-10 specific driver...

Larry beat me to it, but yeah you can find RSI basic at https://electrickery.nl/comp/qx10/disklibrary.html I dumped those and sent them to to Fred a few months back, I just wish I knew i could find the manual for RSI basic so i had a better idea of the available commands and their syntax.

Looks nice. Yeah it might be nice to use a standard 9 pin d-sub for the serial connection. Whats the unpopulated footprint right below SW3 on the right side of the board?

Yeah I know that all too well. I also have a pile of things to do/finish at some point. When you do get back to working on it keep us posted. I'd definitely like to eventually be able to use the PX-8 with an external monitor.

Hey Fred, I'm curious if you have any update about your effort to reverse engineer the UD-80 board? I have a PX-8 in my epson collection and it would be nice to be able to connect it to an external monitor. Brian

It might be any issue with bad memory, I've had at least one machine that behavior somewhat similiarly and had a bad RAM chip that needed replacement. Though i'm unsure why the B2.20 version woulds work in that case. Still you could use the DIAG disk from one of Don's disk sets and see if it...

By Multibank version you mean B2.27? In what manner does it fail to boot? I can't think of any reason it should not boot. I've used it on booth my US QX-10 and QX-16 systems and it boots fine. There is no need for any RAM board. It does support accessing an extra 256k of RAM when used on a...

Last weekend I went and took apart my QX-16HD and was able to dump the BIOS and IPL from it, as far as I know there are no avaialble QX-16 ROM dumps out there at the moment. I sent a copy of them to @fjkraan and they should now be hosted on his website along with three disk images (Typing...

I ended up getting my hands on a couple of QX-16 harddrives recently and was able to image them using my MFM emulator to dump the drives. One wasn't really that interesting, but the other one appears to have come from a system that was used by Epson of America. On that drive I found what appears...