Search found 22 matches

by Will James
Tue May 20, 2025 2:32 pm
Forum: General QL Chat
Topic: My current QL accelerator project
Replies: 53
Views: 6363

Re: My current QL accelerator project

I haven't been able to find a QL shaped Enter Key top. I though I might just have the Vertical 2U Enter Key, put the " \ | " key next to the Enter key and maybe a 1U "Delete" in the top corner - I just trying to source a double-pole cherry key switch so I can take Ctrl and left arrow to it, or ...
by Will James
Mon May 19, 2025 7:18 pm
Forum: General QL Chat
Topic: My current QL accelerator project
Replies: 53
Views: 6363

Re: My current QL accelerator project

Update: OK after getting the Writes working perfectly and thinking the hardware was all done I discovered the Read cycles weren't working at all, another 4 weeks of fault finding I've just succeeded
in getting Reads working... it was all down to a bad solder joint sending me down the wrong path and ...
by Will James
Fri May 02, 2025 11:32 am
Forum: General QL Chat
Topic: My current QL accelerator project
Replies: 53
Views: 6363

Re: My current QL accelerator project

Thanks Martyn... that analysis is good to hear. I'm intending on creating an HD screen on the PiStorm and mapping the QL video writes to it which should improve the speed no end.

Will
by Will James
Thu May 01, 2025 9:45 pm
Forum: General QL Chat
Topic: My current QL accelerator project
Replies: 53
Views: 6363

Re: My current QL accelerator project

I've got some timings for the QL PiStorm writing directly to QL screen memory... it did 800 screen fills in 29.5 seconds... feels a bit slow but I'll need to do the same thing on a normal QL to find out...
would help if I had a working keyboard. Obviously the emulator wouldn't be accessing the QL ...
by Will James
Wed Apr 30, 2025 10:01 pm
Forum: Hardware
Topic: QL Keyboard matrix Figure 4.2
Replies: 5
Views: 400

Re: QL Keyboard matrix Figure 4.2

Hi Popopo, thanks, yes the connection to the QL is a little bodged, I just wanted get it working so I could use it.
I will probably make a little PCB to plug into the 2 keyboard connectors J11 & 12 with an IDC cable linking it.
Looks like I will have to remake it since it was based on an inaccurate ...
by Will James
Wed Apr 30, 2025 9:56 pm
Forum: Hardware
Topic: QL Keyboard matrix Figure 4.2
Replies: 5
Views: 400

Re: QL Keyboard matrix Figure 4.2

Ha! Thanks Andrew - that would explain a few things...
by Will James
Wed Apr 30, 2025 9:13 pm
Forum: Hardware
Topic: QL Keyboard matrix Figure 4.2
Replies: 5
Views: 400

QL Keyboard matrix Figure 4.2

Hi,

Does anyone know if the Figure 4.2 "Keyboard Format" diagram in the QL service manual is accurate? I made myself a keyboard based on it but I'm getting some weird results.
I double checked the wiring and it all seems correct according to the diagram. For example, keys 1,2 & 3 are reversed ...
by Will James
Wed Apr 30, 2025 11:04 am
Forum: General QL Chat
Topic: Advanced QL User Guide
Replies: 57
Views: 46090

Re: Advanced QL User Guide

Hehe! there seem to be quite a lot of mistakes in this book... I was just refreshing my memory yesterday. Page 68 5.3.1 says the screen resolution on a QL is 512x512 or 256x512 - I wish :D
by Will James
Wed Apr 30, 2025 10:38 am
Forum: General QL Chat
Topic: My current QL accelerator project
Replies: 53
Views: 6363

Re: My current QL accelerator project

So, now the hardware is done, I'm starting to work on getting the emulator going. I'm thinking of using Musashi as it runs under Linux which will make RTG and SD hard drive etc a lot easier. It's not as fast as EMU68 which hits the bare metal of the Raspberry Pi. I thought someone else might develop ...
by Will James
Sun Apr 27, 2025 8:19 pm
Forum: General QL Chat
Topic: My current QL accelerator project
Replies: 53
Views: 6363

Re: My current QL accelerator project

Hehe! - I appear to be on a roll at last. Reprogrammed the CPLD to handle !DS correctly. Change QLbuptest to set up the QL display register and got the QL PiStorm V3 copying data to the QL Screen properly now. The gaps in the picture must have been poor soldering on my V2 board or something... after ...