The Sinclair QL Forum

tofro wrote:
Don't call poll_init on every cycle. It will instantiate a new polling interrupt routine every time (that's the reason for both your memory leak and the slowdown).

Call poll_init only once, then re-set the counter c to zero when you wait.

Oh that works brilliantly, thank you!

Okay, okay, got it. So I need to put the counter variable somewhere in one of my global screen structures which is where any of the timer-sensitive delay loops will be running.

I'm afraid I don't follow 90+% of the assembly listed so I do very much appreciate all of the assistance - the last time ...

Actually, I'm still seeing some odd behaviour with this poll/wait routine... but I don't know if it's an interaction with sQLux that is causing it.

With the poll/wait routine in, I observe that each time I call it, the delay gets shorter and shorter relative to the same wait value I pass it, an ...

Ah, what the hell... my guess would be that you never acknowledge the interrupt in the end, so no more are issued, so the operating system is dead.

Okay, thank you for the explanation :idea:

I've added in your poll.s implementation - I get approximately the same effect as the vblank method ...

I'm only disabling them for the duration of that _WAITVBLANKAGAIN loop - it's not as if I'm then jumping back out without turning them back on again (the 0xf8ff mask should set the three interrupt level bits back to level 0, from what I understand). Yet keyboard input (I'm using io_fbyte() to get ...

No difference I'm afraid, the vblank wait routine works fine, and the display animates as expected, but keyboard io stops being received afterwards.

I attach the current build of the game engine and the sample game data files as a 1.44mb QL formatted floppy. Just " exec_w flp1_game " to run ...

I've definitely lost my keyboard input though as the debug box on the next page cannot be cleared (it responds to any key press), so I'clearly need to set something back again. Why not do it right in the first place? I even provided the code :?:

But it should be possible to disable and re-enable ...

I've definitely lost my keyboard input though as the debug box on the next page cannot be cleared (it responds to any key press), so I'clearly need to set something back again.

[youtube]https://www.youtube.com/watch?v=DkHqnkMqHHM[/youtube]

Example animation:
https://www.youtube.com/watch?v ...

QL, all testing is done with sQLux on Linux.

As the author of sQLux its possible I broke that register when adding SDL2 support! Could you attach a binary so I can debug?

I think I've sorted it - it was as the last reply says; I think QDOS was scheduling stuff and clearing the isr. I have ...

Hi folks,

I recently picked up a QL last year and restored it to working state - I was a Spectrum user in my youth, and the QL always seemed rather exotic, so it was nice to be able to finally add one to my collection.

Anyway, at the moment I have an itch to scratch in the form of writing a multi ...