Derek_Stewart wrote: Sun Mar 24, 2024 10:48 pm
There is a problem with the Q60 VGA video output, which does not give a clear video output in 1024x512 HiColour mode, on a modern LCD monitor
This is such a tragedy. At design time, it was simply not foreseeable that flatscreen monitors would no longer have multisync capabilities.
I have spent countless hours on this, but there is no fully satisfying solution.
A clear video picture is possible by a replacement PLD that generates 1024x768 resolution. But it keeps the lower part of the screen black and displays only 1024x512 in the upper area.
Derek_Stewart wrote: Sun Mar 24, 2024 10:48 pm
I am looking into a ways of video signal conditioning to to suit moden LCD monitors.
It has been said that OSSC converters can provide that, if they are well tuned. But one has to be careful about the various variants.
Also I find them clumsy and expensive.
The OSSC is a very comprehensive open source video converter, but is hard to make, the pre-made converter boards are quite expensive.
It has been said that OSSC converters can provide that, if they are well tuned. But one has to be careful about the various variants.
Also I find them clumsy and expensive.
I have tried OSSC and gbs-control on Q60 and I could not find a setting on either that would successfully display the full Q60 screen!
It has been said that OSSC converters can provide that, if they are well tuned. But one has to be careful about the various variants.
Also I find them clumsy and expensive.
I have tried OSSC and gbs-control on Q60 and I could not find a setting on either that would successfully display the full Q60 screen!
Peter wrote: Thu Apr 11, 2024 1:10 pmDid you find any info about the graphics?
No, anticipating when it's on github. Guess would be graphics card in ISA slot.
ISA graphics Would also be a "solution" for the flatscreen monitor problem with the non-standard Q60 video output.
I never seriously considered that because of the much lower performace compared to the fast 32 bit dualport VRAM directly on the CPU bus.
Peter wrote : Curious if someone gets it to work on an up-to-date OSSC.
Hi Peter, I bought an OSSC Kaico v1.6 scan doubler from Amazon for my Q60 during lockdown. Yes it was a bit pricey but I wasn't able to spend on much else, and if you think about the price of the scan doubler to what I paid for the Q60 20 or so years ago which I think if my memory is correct was around £700 it doesn't seem unreasonable to buy one to keep the Q60 going. I have used Thierry's settings with a cheap flat screen and while not perfect it is definitely usable.
