zx-81 colecovision and atari2600 emulator ports run at max 30fps for no obvious reason cant run at original frame rate 50pal/60ntsc frames per second.

pokepoke121 / valentine-hbl

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zx-81 colecovision and atari2600 emulator ports run at max 30fps for no obvious reason cant run at original frame rate 50pal/60ntsc frames per second. #278

Closed GoogleCodeExporter closed 8 years ago

GoogleCodeExporter commented 8 years ago

What steps will reproduce the problem?
1.simply run either emulator
2.
3.

What is the expected output? What do you see instead?
full speed emulation as per on custom firmware/ instead max 30 frames per second

What version of the product are you using? On what operating system?
operating system psp3002 firmware 6.20

Please provide any additional information below.

Original issue reported on code.google.com by thedaz3...@gmail.com on 10 Jul 2010 at 10:19

Merged into: #17

GoogleCodeExporter commented 8 years ago

This is probably the same issue as all other emulators, the fact that we 
override sceCtrlPeekBufferPositive with sceCtrlReadBufferPositive.
I said I would make this an option in the settings file, working on it right 
now.

Original comment by wagic.the.homebrew@gmail.com on 11 Jul 2010 at 6:02

Changed state: Started

GoogleCodeExporter commented 8 years ago

I think it would be possible to make the override dynamic depending on whether 
the estimation fails.

The result of sceCtrlReadBufferPositive is always correct, so it can be 
compared to the result of the estimated sceCtrlPeekBufferPositive and 
sceCtrlPeekBufferNegative.

If peekBufferPositive is estimated incorrectly, it could still be emulated by 
hooking it with a function that calls peekBufferNegative and inverts the button 
variable.

Original comment by jochen.s...@gmail.com on 12 Jul 2010 at 7:33

GoogleCodeExporter commented 8 years ago

Original comment by ametric@gmail.com on 31 Jul 2010 at 3:58

Added labels: Priority-Low
Removed labels: Priority-Medium

GoogleCodeExporter commented 8 years ago

R96 fixes this issue on all firmwares except the psp3000 on 6.20 and psp2000 on 
6.20. This proves it is a syscall estimation error.
You can either try to set override_scePeekBufferPositive to 0 in your conf 
file, or patiently wait for syscalls to become perfect.

Original comment by wagic.the.homebrew@gmail.com on 1 Aug 2010 at 8:02

Changed state: Duplicate