*** M E M O R U M ***

I found the Diag ROM image invaluable when diagnosing the problems with my machine, especially as it doesn't need working memory.

It's impressive stuff.

Thank-you again Andy for the hospitality and the amazing ROM board.

What a fun and informative day. I felt like the dunce in the room with all the talent in the room.

At for the multitude of Kelly's, they were the 1980s model.

It's tomorrow!

The web site doesn't give start/end times. I'm guessing afternoon and evening?

Welcome! The dual serial card doesn't actually have a floppy interface merely a connector to allow it to interface with the FDX floppy drive and 80 column display unit. If you do want a virtual floppy drive interface, it seems that there's still a couple of CFX cards available: http://primrosebank.n...

I'll be bringing along with me an almost complete set of 74LS chips for the MTX which I bought in case I'd fried them when I accidentally put +20V down the ground line of my MTX500. Thankfully I didn't need them as the GAL seemed to act as a fuse and take all the current. I'll also have a spare TMS ...

No more issues! It looks like it's a fully functional machine now. (OK, the keyboard switches bounce a bit, but are getting better. To begin with most didn't work at all. Mostly fixed with switch cleaner/lubricant + working them a lot.) I must admit that I've not tried loading a tape, but that can b...

It looks like it must have been a memory problem that the diag ROM doesn't pick up. I spent an hour swapping memory on one socket (fitted a sacrificial socket on top of the one on the board) and went through all the other memory chips I had, including a set of OKI 64Kb ones, and found all the chips ...

Martin A wrote: ↑

01 Sep 2019 12:55

Did the TIP ever get replaced ??

I don't believe it was in the end.

However, I've been soak testing the machine with 32K programs and it's rock solid. It's been running the port of "Comic Bakery" non-stop for almost two hours now without a hitch.