Gp2x Ram Tweak Settings


Yod4z said:
CAS 2
tRC 6
tRAS 4
tWR 1
tMRD 1
tRFC 1
tRP 2
tRCD 2

what do these ram settings do?

and how do you set it?

cheers
 
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they are ram configurations for gPSP
i tried those they didnt really work well with me (i play mario kart super circuit pretty much) but i find these settings work fantastic for me
fw 3 newest gPSP release

CAS 2
tRC 6
tRAS 8
tWR 3
tMRD 6
tRFC 6
tRP 6
tRCD 6
 
So many numbers, so many possible combinations...

Does anyone know what each setting actually is, and whether there's likely to be any variance in performance gain from app to app (or even clockspeed to clockspeed) by varying them outside of default and the CraigIx ones?
 
little value are better ^^ but some ram chip on some gp2x are bad and then have to change some value to higher value

Taken from cpu-lcd--ram-tweak_2.1b1.zip:
CODE

--cas CAS Latency. Delay in clock cycles between the registration
of a READ command and the first bit of output data.
Valid values are 2 and 3 cycles.
--trc ACTIVE to ACTIVE /AUTOREFRESH command delay. Defines ACTIVE
to ACTIVE/auto refresh command period delay.
Valid values are from 1 to 16 cycles.
--tras ACTIVE to PRECHARGE delay. Defines the delay between the ACTIVE
and PRECHARGE commands.
Valid values are from 1 to 16 cycles.
--twr Write recovery time in cycles.
Valid values are from 1 to 16 cycles.
--tmrd LOAD MODE REGISTER command cycle time.
Valid values are from 1 to 16 cycles.
--trfc AUTO REFRESH command period in cycles.
Valid values are from 1 to 16 cycles.
--trp PRECHARGE command period in cycles.
Valid values are from 1 to 16 cycles.
--trcd RAS to CAS Delay in cycles.
Valid values are from 1 to 16 cycles.
 
Well, correct me if I am wrong, but if it is like most any ram, setting CAS from 3 to 2 is probably the biggy for performance. And probably also where you can tell if your ram is high quality or not.

Reap
 
i tried the craig setting and gpsp didnt seem to like them(crash)
and i took someone's advice and swapped the mmu patch with the picodrive one and tried craigs settings and it runs 10x better
 
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