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steve3000 wrote:Ahh, is it a RISC OS issue?

Its a Pi firmware issue, which has been somewhat confused over the years by unrelated power issues. They even went as far as to fork the firmware in an attempt to fix although I've never tried it.

The root issue is that the USB stack drops packets during high load.

A4000, 4mb, LCD screen - very good, everything runs pretty much as I expect it to, the 50Hz frame pace must be active because sound is correct speed, although just occasionally a note is lost. I've not really tested any of the latest betas on RO3.11, so this is useful to know. I'm not going to worr...

Weren't you generating you own fake vsync signal inside ADFFS or something? Maybe there's a small discrepancy between the internal ADFFS vsync interrupt and the real Rpi vsync interrupt. In the next beta it stops producing the fake VSync if the actual VSync is 50Hz, which will resolve the issue if ...

OS_FSControl 4 is now completely coded. This allows files to be *RUN and intercepted by ADFFS, it's working perfectly on StrongARM - I can't get it work on the Pi though. This is now working on the Pi and all Obey scripts that were changed to use the JIT have been modified in the next beta (2.35 at...

steve3000 wrote:Is this something to take up with ROOL?

I've already raised it and detailed what I believe needs changing to resolve it.

Moved to this thread.

I've uploaded lcdgm with VSync fix to the dev area (LCDgmVS022.zip). Take a look at the source to see how I did it - was quit simple really. Will do, thanks. are the betas computer specific? All of the changes going on at the moment are specific to StrongARM and 32bit compatibility, very few are ap...

Whilst updating Boot scripts today, I noticed I was turning LCDGameModes off in the Lotus Turbo Challenge 2 script. From a previous conversation with Jeffrey, I think this was done to stop the game hanging, due to the critical timing the game requires. Might be worth using it as a test for any futur...

Steve - In the next (Pi) beta, it will turn off the frame pacing code if the system is generating VSync at 50Hz. It might be worth testing 56Hz on legacy machines to see if it is usable. I've yet to code the 50Hz check on IOC/IOMD but can widen the range if we decide to go 56Hz in LCDGameModes. I al...