Search found 1298 matches

by Pr0f
Wed Jan 26, 2022 5:00 pm
Forum: Hardware
Topic: Case for Trump card clone
Replies: 37
Views: 18381

Re: Case for Trump card clone

I vaguely remember seeing one that had a seperate bottom part flat with vents, and through holes in seperate places to allow screwing the top part to it. Does anyone have that design. I've printed this one on an Ender3Pro - but probably should have done it vertically as the top deformed a little. I ...
by Pr0f
Tue Jan 25, 2022 12:53 pm
Forum: Hardware
Topic: Monitor repairs
Replies: 9
Views: 1861

Re: Monitor repairs

The problem with a lot of these monitor designs is that temperatures within the monitor are elevated, and so this affects capacitors - likelyhood is that they will be rated for 85C rather than the more expensive 105C, which whilst it is probably 'enough', is still a stress factor. Added to that the ...
by Pr0f
Tue Jan 25, 2022 7:47 am
Forum: Hardware
Topic: Monitor repairs
Replies: 9
Views: 1861

Re: Monitor repairs

I used to take my CRT monitors to a place in Stevenage - but that was a long time ago - not sure if he'd still be there after all this time. I am guessing due to size and weight you are going to want to find someone local to fix them. Somethings you could try - particularly if the monitors have been...
by Pr0f
Sun Jan 16, 2022 7:10 am
Forum: General QL Chat
Topic: CRT syncing issue, any ideas?
Replies: 10
Views: 3226

Re: CRT syncing issue, any ideas?

You were lucky you didn't cook off all your chips - most of them will tolerate 6V - but no that much more...
by Pr0f
Fri Jan 14, 2022 7:17 am
Forum: The Off-Topic Section
Topic: Happy Birthday!
Replies: 426
Views: 211962

Re: Happy Birthday!

To be fair to Sir Clive - an awful lot of other Software companies and some hardware companies have done the same thing since, not that this excuses the late delivery - but I was very happy with mine when it came :-)
by Pr0f
Thu Jan 13, 2022 12:21 pm
Forum: The Off-Topic Section
Topic: Happy Birthday!
Replies: 426
Views: 211962

Re: Happy Birthday!

What was the actual "Release date" ? ;-) I remember picking up my first QL - a JM ROM version, back in middle of 1985, along with a TV / Monitor, and then buying a proper Philips monitor about a year later to get the full scan width in... An upgrade of ROMS to JS followed soon after too...
by Pr0f
Tue Jan 11, 2022 8:10 am
Forum: The Off-Topic Section
Topic: Happy Birthday!
Replies: 426
Views: 211962

Re: Happy Birthday!

Happy Birthday Dave :-)
by Pr0f
Wed Jan 05, 2022 2:59 pm
Forum: Hardware
Topic: Green Screen problem and poss. a new ROM.
Replies: 10
Views: 2233

Re: Green Screen problem and poss. a new ROM.

What I am trying to say is that Minerva may return from the test (passed) with a lesser amount than 128kBytes and go on to boot. Tobias Agreed - it does say this in the Minerva manual - and warns you may end up with not very much RAM if this happens! My guess is that if the faulty RAM is in the fir...
by Pr0f
Sun Dec 26, 2021 9:21 am
Forum: Hardware
Topic: USB Keyboard IF
Replies: 37
Views: 8066

Re: USB Keyboard IF

As your matrix switch is actually a 12x8 - that gives you 4 extra lines not in the 8x8 matrix - so you have some spare lines for those awkward control keys - as you can't put diodes inside the chip's matrix.
by Pr0f
Sun Dec 26, 2021 9:15 am
Forum: Hardware
Topic: USB Keyboard IF
Replies: 37
Views: 8066

Re: USB Keyboard IF

Pr0f, anything particular you want me to test? So far I only tested the basic combinations with CTRL (e.g. CTRL + arrow left) and with SHIFT. This works well. I do not have a Hermes, so I can not test Hermes specific things. Peter, fully understand your demand. Probably this is useful to you: http:...