Search found 220 matches

by stephen_usher
25 Dec 2020 01:54
Forum: REMEMOrizer
Topic: 3D printed REMEMOrizer case.
Replies: 7
Views: 342

Re: 3D printed REMEMOrizer case.

That looks terrific. With minor modification at the rear it would work with the CFX as well.
by stephen_usher
24 Dec 2020 19:05
Forum: NEW HARDWARE
Topic: RS232?
Replies: 3
Views: 273

Re: RS232?

Given that the schematics and GAL code are freely available, recreating the original is probably the simplest method.
by stephen_usher
19 Dec 2020 15:59
Forum: REMEMOrizer
Topic: Case/Extension Cable?
Replies: 26
Views: 6893

Re: Case/Extension Cable?

Or get the Pi to pretend to be the MTX keyboard to the MTX and use the original keyboard for its own input, with possible pass-through.
(I know that the way the MTX scans the keyboard is a nightmare to simulate.)
by stephen_usher
23 Sep 2020 23:44
Forum: GENERAL DISCUSSIONS
Topic: MTX 512 (debugging thread)
Replies: 73
Views: 20667

Re: MTX 512 (debugging thread)

If you've got a multimeter which can measure current, pull the fuse and clip the multimeter between the two sockets and see how much the machine is drawing. It should be pulling about 0.85 amps. Anything significantly more than that and something is taking too much.
by stephen_usher
15 Aug 2020 13:12
Forum: SOFTWARE
Topic: New tape cleaner tool
Replies: 59
Views: 21641

Re: New tape cleaner tool

Thank-you for the explanation etc. My goodness it's complicated. I'm surprised that the MTX500 and MTX512 save files are different and address dependent. (I also can't remember trying to write a lunar lander program!) As for the drop-outs, I think we can blame rubbish WHSmith C15 cassettes as I have...
by stephen_usher
14 Aug 2020 22:50
Forum: SOFTWARE
Topic: New tape cleaner tool
Replies: 59
Views: 21641

Re: New tape cleaner tool

I was wondering what the parameters did. Is there any documentation?

Of course, once I've the MTX files I'll have to somehow get them on the CFX CF card :-)

Getting to know this utility would help later getting my other tapes read.
by stephen_usher
14 Aug 2020 21:04
Forum: SOFTWARE
Topic: New tape cleaner tool
Replies: 59
Views: 21641

Re: New tape cleaner tool

H-L Slope does the best job, but it doesn't seem to do a good job.

You can find the two wav files (recorded from my hifi tape deck with Dolby turned off) here: http://www.lingula.org.uk/~steve/share/memotech/
by stephen_usher
14 Aug 2020 14:42
Forum: SOFTWARE
Topic: New tape cleaner tool
Replies: 59
Views: 21641

Re: New tape cleaner tool

I got a better copy using a different tape recorder, it still doesn't work, probably due to drop outs.

I'll upload the wav files to my web server and write a new posting when they're ready.
by stephen_usher
14 Aug 2020 14:40
Forum: GENERAL DISCUSSIONS
Topic: MTX 512 (debugging thread)
Replies: 73
Views: 20667

Re: MTX 512 (debugging thread)

If it were the VDP I'd not expect it to work at all.

Seeing as it works until warming up I'd get a freeze spray and see what part of the system works when cool.
by stephen_usher
12 Aug 2020 21:40
Forum: GENERAL DISCUSSIONS
Topic: MTX 512 (debugging thread)
Replies: 73
Views: 20667

Re: MTX 512 (debugging thread)

I must admit that it doesn't look right from memory when I was testing my machine.

If it's the crystal then at least it's something cheap and relatively easily replaced.