Search found 932 matches

by martyn_hill
Tue May 07, 2024 11:10 am
Forum: Hardware
Topic: Recommended maintance & MDV ULA Problem
Replies: 3
Views: 157

Re: Recommended maintance & MDV ULA Problem

Hi Martin! No harm in replacing the Cap in the reset cct, I'm sure. If the problem goes away after a further reset, it could be the 15MHz oscillator driving the ZX8302 ageing and not stabilising 'quickly enough.' But that's just speculation. As for the method used to select each MDV unit, I think I ...
by martyn_hill
Mon May 06, 2024 3:07 pm
Forum: Hardware
Topic: Recommended maintance & MDV ULA Problem
Replies: 3
Views: 157

Re: Recommended maintance & MDV ULA Problem

Hi Martin! I've never had a problem with RESET that required that Cap to be replaced - when I have hitn problems with reset, it was either down to the ZX8302 or something more fundamental with the main ZX8301, but replacing the Cap is a simple and cheap enough operation to eliminate it. I am in the ...
by martyn_hill
Wed May 01, 2024 8:22 pm
Forum: Hardware
Topic: CST Ram Plus eproms - CST QDisc v4 issue
Replies: 9
Views: 529

Re: CST Ram Plus eproms - CST QDisc v4 issue

Hi all! If indeed the v4 board uses the 'scrambled' method for data and/or address lines and if the ROM was programmed in a std programmer from a straight image, then therein would certainly lie one probable cause... A quick check would be to PEEK_W from Basic the base address where the CST ROM is e...
by martyn_hill
Wed May 01, 2024 12:16 am
Forum: Hardware
Topic: QL-SD jumperable
Replies: 12
Views: 2848

Re: QL-SD jumperable

Ah, OK. Bit of a schlep from London...

I have the equipment needed to reflash the QL-SD device and have made the same change on one of mine successfully.

PM me and perhaps we can figure out how cost effective shipping to/fro would be.

Or are you planning to attend the Dormagen event in May?
by martyn_hill
Tue Apr 30, 2024 10:59 pm
Forum: Hardware
Topic: QL-SD jumperable
Replies: 12
Views: 2848

Re: QL-SD jumperable

Where are you afx?

(Just roughly, not asking for you to reveal anything sensitive!)
by martyn_hill
Fri Apr 26, 2024 1:00 pm
Forum: Prospective Members
Topic: Is QUANTA stil alive / accepting members?
Replies: 51
Views: 66158

Re: Is QUANTA stil alive / accepting members?

Just to update - Mr Southern was in touch yesterday via email - looking forward to recieving the new magazine!
by martyn_hill
Thu Apr 25, 2024 10:13 pm
Forum: Hardware
Topic: OqtaDrive
Replies: 153
Views: 84426

Re: OqtaDrive

Well done, Alex!
by martyn_hill
Tue Apr 23, 2024 4:07 pm
Forum: Hardware
Topic: SOLVED ntsc sinclar ql schematics ??
Replies: 15
Views: 900

Re: ntsc sinclar ql schematics ??

Hi again Peter! To be fair, the UK keyboard was already pretty much based on the US layout - something I was surprised to discover when developing the extra language maps for the Qbase :-) Did you finish any of them? No, not yet. I developed a flexible framework to support up to 8 distinct, user-sel...
by martyn_hill
Tue Apr 23, 2024 4:03 pm
Forum: General QL Chat
Topic: Anouncement for the 40th Anniversary of the Sinclair QL in Dormagen (Germany)
Replies: 33
Views: 5166

Re: Anouncement for the 40th Anniversary of the Sinclair QL in Dormagen (Germany)

Hi Peter!
Peter wrote: Tue Apr 23, 2024 1:10 pm Superb! When do you need to travel back? I might even stay on Sunday if some others also can stay.
Unfortunately, I need to back Sunday evening - both for work and also as my 16-yr old is in the midst of his GCSE exams, so will be flying back around 4pm from Dusseldorf...
by martyn_hill
Mon Apr 22, 2024 12:00 pm
Forum: General QL Chat
Topic: Anouncement for the 40th Anniversary of the Sinclair QL in Dormagen (Germany)
Replies: 33
Views: 5166

Re: Anouncement for the 40th Anniversary of the Sinclair QL in Dormagen (Germany)

Hi everyone!

Just to say that, after careful consideration, I have now gone ahead and booked my flight for the Dormagen QL event in May :-)

Looking forward to seeing some of you there...