Search found 557 matches

by 1024MAK
Mon Jan 27, 2020 2:03 pm
Forum: The Off-Topic Section
Topic: QL vs BBC vs Amstrad 464
Replies: 9
Views: 913

Re: QL vs BBC vs Amstrad 464

The 6502 CPU used in the BBC Micro only uses the data-bus when the CPU clock is high. Hence if you isolate the address and data lines, the video system can use the time when the CPU clock is low to get screen data from the main RAM. Hence no slowdown. Note that this does not apply if you want your 6...
by 1024MAK
Sat Jan 04, 2020 11:38 am
Forum: For Sale
Topic: Anyone interested in a brand new Sinclair ZX80 case?
Replies: 5
Views: 617

Re: Anyone interested in a brand new Sinclair ZX80 case?

The original cases were vacuum formed. This is where a flat sheet of plastic is heated, then a vacuum pulls the plastic over a mould to form the shape. Any cut-outs that are required then need to be machined out. Injection moulded cases are described by Rick Dickinson in some detail on this page . B...
by 1024MAK
Wed Jan 01, 2020 11:12 am
Forum: For Sale
Topic: Anyone interested in a brand new Sinclair ZX80 case?
Replies: 5
Views: 617

Anyone interested in a brand new Sinclair ZX80 case?

A member of the Sinclair ZX World forum is trying to get a run of brand new Sinclair ZX80 cases manufactured. He says this: I've been working hard recently in getting together different manufacturers in order to produce an EXACT copy of the Sinclair ZX80 case, either the original, or the later injec...
by 1024MAK
Fri Dec 27, 2019 5:24 pm
Forum: Wanted
Topic: Schon keyboard
Replies: 13
Views: 1723

Re: Schon keyboard

These keyboards may have some problems, but then, there are not many keyboards that are over 30 years old that don’t have at least some problems...

Mine (see here) still works okay. Although I don’t use this machine as my regular QL.

Mark
by 1024MAK
Mon Dec 23, 2019 10:29 pm
Forum: Hardware
Topic: Keyboard Interface problem
Replies: 24
Views: 1090

Re: Keyboard Interface problem

Some early AT keyboards had a switch to select XT mode. Of course that won’t help if all you have are PS/2 keyboards... If you search the ‘net you will find that there are three keyboard protocols for the five pin DIN system. It should also be possible to use a microcontroller to carry out a convers...
by 1024MAK
Sun Dec 22, 2019 5:33 pm
Forum: General QL Chat
Topic: A Special Surprise Will be Unveiled on Christmas Eve!!
Replies: 9
Views: 592

Re: A Special Surprise Will be Unveiled on Christmas Eve!!

@vanpeebles » your not going to breakout of a very large box wrapped in Christmas paper again are you :lol:

Mark
by 1024MAK
Sun Dec 22, 2019 3:52 pm
Forum: General QL Chat
Topic: QL Haul, list of Contents and questions!
Replies: 28
Views: 1136

Re: QL Haul, list of Contents and questions!

Atari ST mice, Amiga mice, Acorn 8 bit and Archimedes mice are all ‘bus’ type. They of course all use different connectors or pin-outs. But if an adaptor cable is made, they will work with other bus type systems.

Mark
by 1024MAK
Sat Dec 21, 2019 11:16 pm
Forum: The Welcome Area
Topic: Hello from Bristol
Replies: 5
Views: 297

Re: Hello from Bristol

vanpeebles wrote:I can't help but think of a Two Ronnies, Newsdesk joke. And tonight we talk to a man from Bristol with a pair of QL's and another man from Queue-Ell with a pair of *pause* never you mind!

And it’s good night from him... :lol:

Mark
by 1024MAK
Sat Dec 21, 2019 7:59 pm
Forum: The Welcome Area
Topic: Hello from Bristol
Replies: 5
Views: 297

Re: Hello from Bristol

Hello and Welcome to the forum :D

Yes, lots of fun still to be had.

Mark

PS I have just arrived home after being in Bristol for most of the day...
by 1024MAK
Sat Dec 21, 2019 7:53 am
Forum: Help for New Users
Topic: Dead BBQL from old Gold Card
Replies: 16
Views: 692

Re: Dead BBQL from old Gold Card

Smells like a RAM fault to me. See this helpful web page and the online decoder/calculator is here . Could also be a dry solder joint, a poor connection (e.g. on an IC socket), or maybe a track that has a crack in the copper conductor. With all the disturbance, that may explain why it’s got worse an...