Petri Pellinen wrote, on 12/Sep/10 18:05 | Sep12:
Thanks for the pointers, Dilwyn. And by the way, your web site is
absolutely marvellous, a treasure trove of information! I think I will
try the SCART connection just to see if I get a better picture and
also to see if the picture changes when the QL warms up.
You can experiment with the series resistors. I think I used 200k.
I must say, 25 years ago I couldn't appreciate how advanced QDOS was
for the time (multitasking, pipes etc). Then again, the local computer
stores over here
Where is 'here' - Finland?
didn't carry the necessary books to learn all of that
stuff and ordering them from abroad was a nightmare so it was next to
impossible to find out about the inner workings of the machine. Last
week, I managed to purchase a copy of "The Sinclar QDOS companion" - I
wish I had had that book all those years back :)
I can't remember when QRAM arrived - probably later than 1985.
It was only then the true potential of multitasking became obvious.
QDOS had no screen control/refresh which is pretty essential.
Of course it had support for the pre-emptive multitasking, but left it
up to addon programs to implement it.
My one and only machine code program though (prior to I think Qram) was
a small multitasking on-screen clock which I still use.
Tony
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