Search found 199 matches

by stephen_usher
01 Sep 2019 16:40
Forum: HARDWARE
Topic: Resurrecting an MTX500.
Replies: 226
Views: 10663

Re: Resurrecting an MTX500.

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...
by stephen_usher
01 Sep 2019 15:53
Forum: HARDWARE
Topic: Resurrecting an MTX500.
Replies: 226
Views: 10663

Re: Resurrecting an MTX500.

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 ...
by stephen_usher
01 Sep 2019 13:49
Forum: HARDWARE
Topic: Resurrecting an MTX500.
Replies: 226
Views: 10663

Re: Resurrecting an MTX500.

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.
by stephen_usher
01 Sep 2019 12:38
Forum: MEMOFEST 2019
Topic: Memofest 2019 at Andys
Replies: 4
Views: 270

Re: Memofest 2019 at Andys

I plan to do so too... and bring my slightly misbehaving resurrected MTX500 with me for some diagnosis at the clinic.
by stephen_usher
01 Sep 2019 12:36
Forum: HARDWARE
Topic: Resurrecting an MTX500.
Replies: 226
Views: 10663

Re: Resurrecting an MTX500.

Ah, no. Leaving it to warm up and it's back to its old ways again.

I wonder if it's a problem with a capacitor.
by stephen_usher
01 Sep 2019 12:22
Forum: HARDWARE
Topic: Resurrecting an MTX500.
Replies: 226
Views: 10663

Re: Resurrecting an MTX500.

Well, it's September and I'm back to the MTX... It looks like the GAL acted as a lightning rod and took all the damage. Phew! After I replaced that I have a working machine again. If anything, for some unknown reason it seems a little more stable than it did before with CP/M running for longer and m...
by stephen_usher
27 Jul 2019 20:12
Forum: PROGRAMMING
Topic: Bootstrap and boot blocks
Replies: 99
Views: 3354

Re: Bootstrap and boot blocks

Dave wrote:
27 Jul 2019 16:58
stty cols x works and the games are formatted correctly

the stty settings are transient though, I guess they need to be saved in some way
They would be. It's something to do with the console driver not reporting the screen size correctly I would imagine.
by stephen_usher
26 Jul 2019 17:50
Forum: PROGRAMMING
Topic: Bootstrap and boot blocks
Replies: 99
Views: 3354

Re: Bootstrap and boot blocks

It looks like getty isn't setting up the rows and columns of the terminal.

You can set them manually using: 'stty rows 22 columns 39' (counting the characters on the screen in those photos to get the numbers).
by stephen_usher
23 Jul 2019 10:32
Forum: PROGRAMMING
Topic: Bootstrap and boot blocks
Replies: 99
Views: 3354

Re: Bootstrap and boot blocks

I need to do some more reading, I thought that I would be able to run the programs when logged into the /usr/games directory, but it seems that I ned to run them from my home directory with the path specified I've always found it strange that MSDOS terminology for setting the current working direct...
by stephen_usher
23 Jul 2019 10:23
Forum: PROGRAMMING
Topic: Bootstrap and boot blocks
Replies: 99
Views: 3354

Re: Bootstrap and boot blocks

Dave, Standard Unix / Linux / Fuzix / Raspbian :) Unlike Windows, the current directory is not (generally) in the path. Therefore if you want to run a file in the current directory you have to specify "./filename" not just "filename. That is a "dot" (for current directory), a "slash" (the path sepa...