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I don’t know anything about the G540 programmer, but I do know that my TL866a, although when I bought it, listed the GAL22V10 as a supported device, would not correctly program the GAL. The symptoms were similar to those you describe, it would appear to program the device, then fail the verify. Alth...

First thing that springs to mind is a possible bad connection between the MTX and CFX-II boards due to the edge connector, but it would be good to try and confirm whether the problems are with the base machine first. The loading problem could be a bad tape, do you have other tapes that you can try w...

Messages stay in the outbox until they are read

(If you click on their username(s) you can see when they were "Last Active" - they likely have not logged in and seen the messages)

regards
Dave

And a bigger desk

Technically possible, but . . . .

Ugly

[*]When I was developing my DIY Navtex receiver , the decoding software was developed on my MTX, using the CTC for timing. (I thought that at one time Dave had a page for this as it is Z80 based, but if so I can no longer find it). That’s my fault - another example of poor site layout and indexing ...

Thanks for the kind words :-) Having to remove the serial board to install MFX was a deliberate choice. We figured that the vast majority of people would not be using serial port devices and the TCP/IP communication option would be better in almost all circumstances. [If there was a huge demand (and...

Yes, the port is only rated to supply 20mA, which isn't really enough (it initially caught us out on the MTX PS/2 keyboard project).
http://primrosebank.net/computers/mtx/p ... ps2kbd.htm

As you say, its location isn't really user friendly either

regards
Dave

on the uses for the PIO, I mentioned the PAL reader that Tony Brewer designed for me http://primrosebank.net/computers/mtx/projects/pal_reader/palreader.htm There are also quite a few legacy electronics projects listed here, such as a RTC for the MTX http://primrosebank.net/computers/mtx/projects/mt...

Good point