The Sinclair QL Forum

Derek_Stewart wrote: Sat Jul 05, 2025 11:18 am
Please forgive me for asking, but could not C68 be made to produce Reentrant code?

You can, and from time to time it even works

There are, however, no libraries available for C68 to link to PC-relative code. You'd need to adapt/recompile them all.

No. This is how I got the machine. I think the mod may have been there in the past but was removed by the previous owner. What does the mod do? It doesn't prevent freezing by any chance does it?

You must place them.
It is for MDVs (if I am not wrong) but may affect other parts.

Well, you ...

Hi All,

I'm having some issues with my QL (Issue 5). The machine boots up fine and works without issue usually for about an hour before freezing. When the machine freezes there's no screen corruption. All that happens is that the cursor stops flashing and the computer stops accepting input. If I ...

Martyn - glad to say that v3.05 of ndq68_dvr_v305 works with the combination of equipment listed below, will try the other software version later. I had FSERVE going on all three machines, all accessed each others' drives OK. I'll see what other equipment I can put on the network tonight, maybe ...

I don't know if SMSQ/E at 7.5 MHz in a ~640K machine would be particularly enjoyable but it would be better than QDOS. I'd be interested in that, too.

Speed-wise, SMSQ/E would be more enjoyable than QDOS on the QL. Three main contras:

I'm not with you on that. The concepts of the internal ...

Well, TRAP #0 is especially designed to suppress multitasking and switch off the scheduler - It's the QDOS way to avoid expensive mechanisms like mailboxes and semaphores you'd otherwise need to sync jobs with each other.

@Derek Jobs will only be blocked from concurrent access to the screen when ...

If you experience problems with a QL after having inserted a card into the expansion connector, don't forget to check there. It's actually quite easy to bend pins in there and create shorts with a bit of sloppy handling.

Hello,

Are there some examples of assembly programming for the QL? In particular when the program is written and assembled on a host machine and running in an emulator. I am knowledgeable enough in 6800x programming, it's everything else I'm missing, e.g.


A skeleton "Hello world" program for ...

dilwyn wrote: Wed Jun 18, 2025 11:05 am viewtopic.php?p=39138#p39138

I think this is what tofro was referring to.

Yep, that's it. Thanks Dilwyn for remedying my laziness...

We should be able to have a much better version of a racing game on the QL.


No, we shouldn't. Vroom does an awesome job in scrolling the large (32k) QL screen while a VIC 20 only has to move 4k around to do the same thing. The QL is hampered here because of it both having a generous amount of ...