Search found 393 matches

by Pr0f
Thu Aug 01, 2019 10:40 am
Forum: General QL Chat
Topic: Oh Hum, The Wiki Has Been Spammed.
Replies: 16
Views: 2178

Re: Oh Hum, The Wiki Has Been Spammed.

a 2 bit scumbag who couldn't make it in a 32 bit world. :D
by Pr0f
Tue Jul 30, 2019 3:10 pm
Forum: Hardware
Topic: Sinclair QL - QL-SD with vDRIVE QL
Replies: 22
Views: 2425

Re: Sinclair QL - QL-SD with vDRIVE QL

You should be able to use both - there are 2 ROM sockets in the QL - both are wired exactly the same, so you could put the QL-SD in the right hand one as you look at the front, and the rom switcher in the left socket.
by Pr0f
Tue Jul 16, 2019 1:17 pm
Forum: The Off-Topic Section
Topic: Welsh Meters
Replies: 21
Views: 2318

Re: Welsh Meters

And there was I thinking it was a new regional metric measurement ! :D :D
by Pr0f
Wed Jul 10, 2019 1:01 pm
Forum: For Sale
Topic: Unknown memory expansion
Replies: 6
Views: 1476

Re: Unknown memory expansion

looks like those 4 simms are soldered - but for 256Kb they must be 64Kb in size !!
by Pr0f
Thu Jun 27, 2019 9:06 am
Forum: Compatibles Corner
Topic: ICL OPD
Replies: 31
Views: 2871

Re: ICL OPD

This is pretty much the circuit used in the OPD: http://www.openmusiclabs.com/learning/digital/input-scanning-matrix/dual-shift-mux/index.html There are 2 extra lines on the 20 pin ribbon from the keyboard, that I think carry keypress details for specific functions keys on the keyboard (resume, etc)...
by Pr0f
Thu Jun 27, 2019 8:54 am
Forum: Compatibles Corner
Topic: ICL OPD
Replies: 31
Views: 2871

Re: ICL OPD

vanpeebles wrote:I take it those two registers are not very good? :lol: :lol:


oops - I love a good typo in the morning....
by Pr0f
Wed Jun 26, 2019 8:07 pm
Forum: Software & Programming
Topic: QOMBI
Replies: 14
Views: 1437

Re: QOMBI

I remember a highly addictive game called Kye on the PC - a puzzle game with many levels - the last ones quite devious.

Boxworld was another fun but pointless game too :-)
by Pr0f
Wed Jun 26, 2019 1:04 pm
Forum: Software & Programming
Topic: Knoware.no
Replies: 16
Views: 1992

Re: Knoware.no

bookmarked for later perusal - some interesting articles and toolkits for sure :-)

I must confess it's the hardware for me - but I do appreciate that the hardware would be nothing without good software support.
by Pr0f
Wed Jun 26, 2019 9:09 am
Forum: Compatibles Corner
Topic: ICL OPD
Replies: 31
Views: 2871

Re: ICL OPD

I forgot to add in my diagnosing that the keyboard for the OPD is handled by 2 shit registers, and the clock, clear, shift data in and out and the parallel load are all signals routed to the off board modem / telco unit. This has an on board 8051 chip which appears to be handling the reading of the ...
by Pr0f
Mon Jun 24, 2019 3:56 pm
Forum: Compatibles Corner
Topic: ICL OPD
Replies: 31
Views: 2871

Re: ICL OPD

Attached is a PDF with some further info gained by some reverse engineering on the boards I have.