The Sinclair QL Forum

I just got a "new" QL in my collection and "print ver$" shows "AH" as response. If I try to run any well know software I have it often fails because of problems with basic? Seems to be very first model of QL, isn't (SN D06-004598)? Pls look at the picture attached. Whic...

This is strange, since normal microdrives work. Did you check your bootfile? Does your normal microdrive respond? Does vDrive work if you abort the QL-SD ROM initialisation sequence by a key press? Hm, I'm new to QL, so if you ask "check your bootfile" I have no clue how to do this :roll:...

If you want to stick with the old driver, look if you have SDC_USE "MDV" somewhere in your Bootfile and remove it. Or try SDC_USE "WIN". I tried to use SDC_USE "WIN". It causes QL-SD not to respond to "MDV" but the vDrive cannot be reached (in a normal way by...

Do you mean this driver "QL-SD card driver v0.07.078"?

If so, how can I update it? I've looked for some resources without success...

Have you ever tried to use both QL-SD and vDrive devices in parallel? In my case after QL-SD driver is loaded I cannot reach the vDrive because for all calls to "mdv*_" the response is delivered by the QL-SD. Can I change this behavior? Tested with EN Minerva 1.98, Miracle memory card, QL-...

Hi guys, many thanks, my code with interrupts off and correct vsync (and after "no beer" review ) works as expected!

Thanks, I have found this great side too. Surprisingly the following code:
helped to run the code above smoothly using Qemulator, however my problem with the real QL remains as it was (the sync does not work).

Entering super mode with trap #0, as I understand. But I cannot find a code snippet to switch off interrupts. Can you help me?

To get a 100% stable sync with the display, you need to enter supervisor mode and switch off interrupts - otherwise, the toggling of the timer interrupt bit in the interrupt register will cause QDOS to enter the scheduler before it even runs the loop, with all sorts of things happening that could o...

Hi Tobias, many thanks for your fast and great response! However my problem still remains. In Qemulator my code works, using a real QL the sync does not (it flickers as it would be without the sync). Here my code example: SCREEN equ $20000 PC_INTR equ $18021 repeat lea sinus,a5 lea SCREEN,a6 loop mo...