yust tried ... but it seems i'm to stupid for this task 
Gp2x Delfault Runing 298mhz !!!
- Thread starter Slowfinger
- Start date
Drak
fff
Hehehe, im sure itll go straight onto gp32x.de as soon as Evildragon, or Hando sees it!
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doh ... i yust didn't get, that new treads have to be approved by a higher being
now i posted TWO threads ... gna ...
now i posted TWO threads ... gna ...
Drak
fff
god_at_hell posted on Dec 9 2005 at 03:53 PM said:doh ... i yust didn't get, that new treads have to be approved by a higher being
now i posted TWO threads ... gna ...
Moo-Hahaha!
Man.. I sure do hope I get my Gp2x tommorrow [5-7days] [tommorrow is 7
] I really wanna see how metal slug is ive never played it before heh and with this it runs superb with mp3!
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Quiest
I like turtles!
Just thank you for that new version! Very much!
woogal
Certified Guru
It seems that 266mhz isn't always stable (only got quake to complete a timedemo once, all other attempts fail after a little while), but 250mhz works well for me. Those lower speeds still need a bit of work though - the flicker is unbearable at 60 or 66mhz.
nik166
:3 :3 :3
woogal posted on Dec 10 2005 at 12:00 AM said:
same, i noticed that sometimes it could even crash IMMEDIATELY when setting 266, even before to go back to the browser
it seems 266 is less stable than 280
(but 280 ended by crashing quake too anyway )250 looks good
and with NO flicker! B)(edit: 250 just crashed after some minutes of SNES
)
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Robster
Dodgy hardware mod maker
To set up the LCD controller when the clock is changed, follow this procedure:
One horizontal scan line consists of 320 pixels, plus a HSync period of 84 clocks (by default) - that is 404 clocks.
One vertical scan consists of 240 horizontal lines + 22 VSync lines - that is 262 lines or 105,848 clocks.
To get a display refresh rate of 60Hz, we need the clock to be 60*105848 = 6350880 Hz, or around 6.35MHz.
The display clock is set by the DISPCSETREG register. In that, you can choose a clock source and a prescaler. By default, this is set to 0x4A00, which means the source is FPLL, and the prescaler divides by 11, to the default display clock is 199065600/11 = 18.096873MHz. That's almost exactly 3 times what I'd expect it to be, so if anyone can explain this mystery factor of 3, I'd really appreciate it!
Anyway, if you change FPLL, set DISPCSETREG to (0x4000 + (((fFPLL / 18100000)-1)<<8). That should make the display adjust correctly. For example, for 200MHz, this gets 0x4A00, which is correct. For 100MHz, set it to 0x4400, and for 60MHz, set it 0x4200 (these won't get exactly 60Hz).
Play around with this, you may get some interesting results
One horizontal scan line consists of 320 pixels, plus a HSync period of 84 clocks (by default) - that is 404 clocks.
One vertical scan consists of 240 horizontal lines + 22 VSync lines - that is 262 lines or 105,848 clocks.
To get a display refresh rate of 60Hz, we need the clock to be 60*105848 = 6350880 Hz, or around 6.35MHz.
The display clock is set by the DISPCSETREG register. In that, you can choose a clock source and a prescaler. By default, this is set to 0x4A00, which means the source is FPLL, and the prescaler divides by 11, to the default display clock is 199065600/11 = 18.096873MHz. That's almost exactly 3 times what I'd expect it to be, so if anyone can explain this mystery factor of 3, I'd really appreciate it!
Anyway, if you change FPLL, set DISPCSETREG to (0x4000 + (((fFPLL / 18100000)-1)<<8). That should make the display adjust correctly. For example, for 200MHz, this gets 0x4A00, which is correct. For 100MHz, set it to 0x4400, and for 60MHz, set it 0x4200 (these won't get exactly 60Hz).
Play around with this, you may get some interesting results
chris_r
Active Member
- Joined
- Jun 16, 2004
- Messages
- 745
Could someone with a multimeter check how much more/less power is being used at different speeds?
And the flicker seems to go at higher speeds. Could it be that the original firmware ran at a higher clock speed? Could anyone with the original formware check their clock speed?
And the flicker seems to go at higher speeds. Could it be that the original firmware ran at a higher clock speed? Could anyone with the original formware check their clock speed?
furikuri
Still Fresh
I tried tried the psx emulator at 2 speeds and tried FF7 and DOA. Playing them at 266mhz was a speed boost and is more playable now.
280mhz:
FF7 crashes early on, in the intro video.
DOA crashes a towards the end of the fight.
266mhz:
FF7 shows some good improvement speed wise.
DOA is a lot more playable than before(I actually had the patience to go through a round).
280mhz:
FF7 crashes early on, in the intro video.
DOA crashes a towards the end of the fight.
266mhz:
FF7 shows some good improvement speed wise.
DOA is a lot more playable than before(I actually had the patience to go through a round).
Drak
fff
Can any1 give a report on FF Tactics please? ^.^
Maybe someone could get a version of this that loads on boot cause it really solves a lot of problems(at least in my gp2x ).Perfectly stable(except for the video player which doesn't even start) with none of the previous,lcd related problems at 280.
).Perfectly stable(except for the video player which doesn't even start) with none of the previous,lcd related problems at 280.
nubie
Recovering Jerk-A-Holic
An interesting "people fix" is to use this to clock at 60mhz.
The flickering is so bad that once you go back to 200mhz, any incidental flickering will barely bother you, now that you know what flickering really is.
Robster,
Are you able to make me a program to set the refresh to 100Hz?
I must do this on all my computers to stay sane, if I need to do this to my GP2X I would like a way to do it.
The flickering is so bad that once you go back to 200mhz, any incidental flickering will barely bother you, now that you know what flickering really is.
Robster,
Are you able to make me a program to set the refresh to 100Hz?
I must do this on all my computers to stay sane, if I need to do this to my GP2X I would like a way to do it.
