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by martyn_hill
Wed Oct 14, 2020 6:50 pm
Forum: Software & Programming
Topic: Returning values from a basic extension function
Replies: 31
Views: 903

Re: Returning values from a basic extension function

Hi Daniel! As well as those terrific examples already cited, getting a good grasp of how the QDOS Maths-stack (usually referred to as the 'RI' stack) needs to be cared-for is well worth the study. Of all the references I've trawled in the past, I found Mr Dunbar's essay on the Maths stack to be the ...
by martyn_hill
Sat Sep 19, 2020 1:56 pm
Forum: Hardware
Topic: HAL equations / JED for use in a GAL chip
Replies: 7
Views: 704

Re: HAL equations / JED for use in a GAL chip

Hi Tetroid! I was intrigued by your recommendation: For other QL PCB versions - capacitor 47 pF between pin 4 ( DSMCL ) of PAL chip and ground ). Out of interest, is the capcitor to effectively insert a delay before the GAL detects DSMC, or else just to reduce any noise causing it to falsely trigger...
by martyn_hill
Wed Sep 09, 2020 5:37 pm
Forum: Hardware
Topic: BT Plugs for Joystick and Serial
Replies: 8
Views: 1105

Re: BT Plugs for Joystick and Serial

Hi Chr$ and Ruptor! Excellent. That is quite expensive though, isn't it (I feel). But with limited availability I suppose they can charge what they like. Yes, expensive for what they are - one of the reasons I shared the details was the possibility that, if we as a community (via one of our dedicate...
by martyn_hill
Wed Sep 09, 2020 4:33 pm
Forum: Hardware
Topic: BT Plugs for Joystick and Serial
Replies: 8
Views: 1105

Re: BT Plugs for Joystick and Serial

Hi everyone! I recently trawled the web looking for both these two BT-style plugs and found a reasonable-cost supplier of both. I myself ordered a small batch of the QL Serial type (BT-631W) and inquired of the same supplier whether they could source the Joystick variety (BT-630W), which wasn't show...
by martyn_hill
Wed Sep 09, 2020 1:08 pm
Forum: The Welcome Area
Topic: Hey, y'all.
Replies: 12
Views: 1507

Re: Hey, y'all.

Hi everyone With reference to Derek's comment re Network timing on QXL, should a faster CPU be installed... This would have problems with the QL Network, as it needs accurate speed timings, ... The NET driver included with SMSQE for QXL (so called 'Variable clock' version) is actually highly configu...
by martyn_hill
Sun Aug 02, 2020 6:28 pm
Forum: Software & Programming
Topic: QDOS/SMSQE PRINT Procedure Whitespace issue
Replies: 8
Views: 758

Re: QDOS/SMSQE PRINT Procedure Whitespace issue

Hi there. Just wondering what range of values the two parameter strings font_flg$ & margin$ could take in your PRINT statement: PRINT#outpipech%,font_flg$&margin$&txt$ Specifically, could either string contain a CHR$10 that would upset the INPUT at the other end of the pipe? Whilst I can...
by martyn_hill
Sat Jul 25, 2020 3:03 pm
Forum: Hardware
Topic: QNET to USB adapter
Replies: 10
Views: 1415

Re: QNET to USB adapter

Hiya Chr$ So how did that come along Martyn, if/when you see this? I think something along those lines would be a fantastic new product. Still moving along, but distracted by many other projects - and yes, Peter's Q-zero offers an alternative approach that shows a lot of promise :-) As of today, usi...
by martyn_hill
Fri Jun 26, 2020 5:00 pm
Forum: Hardware
Topic: Issue 6 VM12 & resistors confusion
Replies: 79
Views: 5904

Re: Issue 6 VM12 & resistors confusion

Hi Ruptor I don't recall if you ever checked/replaced the ZX8302 - bear in mind that any comms with the IPC (and this the keyboard) must flow through the 8302 first. One clue, when using Minerva, is whether you get a consistent 'time/date' shown after repeated pressing of Reset - it'll be a nonsense...
by martyn_hill
Wed Jun 10, 2020 12:34 am
Forum: Hardware
Topic: Boot Q68 without monitor and keyboard
Replies: 21
Views: 1950

Re: Boot Q68 without monitor and keyboard

As far as I recall, the Q68 start-up code will complain and stall if a mouse is plugged in to the KB port (i.e. in to the wrong socket in the splitter), so you are stuck with needing a KB...

Perhaps Peter G will know of a work-around?
by martyn_hill
Tue Jun 09, 2020 9:03 pm
Forum: Hardware
Topic: Boot Q68 without monitor and keyboard
Replies: 21
Views: 1950

Re: Boot Q68 without monitor and keyboard

Hi afx

I believe that the PS/2 KB must be present to allow the Q68 to boot, but no monitor need be attached.