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Amiga computer related discussion => Amiga Software Issues and Discussion => Topic started by: Vlabguy1 on February 07, 2012, 12:37:32 AM
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Accurate with displayed speeds etc??
Thanks
Rich
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Accurate with displayed speeds etc??
Thanks
Rich
Looks like a overclocked 040? look at the oscillator on the 040 board to verify.It is probably correct.
Not sure what you mean,but... Its kinda sorta accurate on some stuff, usually 040 and less.060 will be reported incorrect usually. Having buggy 040 libs can effect the results at times.
Back in the day we called it "sysMISinfo"
It is useful for some stuff like checking lib versions and devs etc.Its hard drive speed tests are mediocre at best.
Mech
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Back in the day we called it "sysMISinfo"
Sounds logical. My 50 mhz Blizzard '030 is rated at 55.80 mhz :lol:
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Looks like a overclocked 040? look at the oscillator on the 040 board to verify.It is probably correct.
Not sure what you mean,but... Its kinda sorta accurate on some stuff, usually 040 and less.060 will be reported incorrect usually. Having buggy 040 libs can effect the results at times.
Back in the day we called it "sysMISinfo"
It is useful for some stuff like checking lib versions and devs etc.Its hard drive speed tests are mediocre at best.
Mech
Ah ok. it is a 28mhz Warp 040 :). But from what I understand new processor new oscillator can change all that?? :).
Thank you.
Rich
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Sounds logical. My 50 mhz Blizzard '030 is rated at 55.80 mhz :lol:
I wonder could that be the real speed? With manufacturing tolerances and other factors. I mean why print 55.80mhz on an oscillator or processor ..just round down to the nearest and print( I mean on the actual chip).. There is always a + or - % either way when it comes to electronics. Could be SysInfo is pretty accurate...with somethings.
I'm probably way off so forgive me it is early. :)
Rich
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I wonder could that be the real speed? With manufacturing tolerances and other factors. I mean why print 55.80mhz on an oscillator or processor ..just round down to the nearest and print( I mean on the actual chip).. There is always a + or - % either way when it comes to electronics. Could be SysInfo is pretty accurate...with somethings.
I'm probably way off so forgive me it is early. :)
Rich
If it's 28MHz 040, it'll have a 56.000 MHz Oscillator on your card. If that's what's printed on the oscillator then that's precisely what the speed will be, whatever sysinfo reports. Oscillators are precisely manufactured to extremely high tolerance levels. They are designed to be perfectly accurate.
Try WhichAmiga http://aminet.net/package/util/moni/WhichAmiga which seemingly reports correct clock speed.
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I wonder could that be the real speed? With manufacturing tolerances and other factors. I mean why print 55.80mhz on an oscillator or processor ..just round down to the nearest and print( I mean on the actual chip).. There is always a + or - % either way when it comes to electronics. Could be SysInfo is pretty accurate...with somethings.
I'm probably way off so forgive me it is early. :)
Rich
There are lots of factors on oscillators.. such as ripple,clock jitter and other things. tolerance is important too.there is also trace lengths on boards to consider and interference from other parts near by. frequencies that are not rounded off are used to fine tune in some cases.
When processors are made they dont know the actual speed they will run at until they got through testing. the parts will usually pass different speeds reliably so they get marked what speeds they can run. motorola for example mark chips with non working MMU/FPU as EC,and parts with fully working mmu/fpu are XC or RC. same thing with speeds.
There are many needs in the world for oscillators that are not "rounded off"
like radio frequencies for example.. just think of radio stations for example.
106.9,98.3 etc..dont forget ntsc also at 15.734khz
more than likely you may have a 55.80mhz oscillator in the warp engine.there is many factors in a computer that can determine what the chip really see's for a clock.Don't assume sysinfo reads it correctly in all situations ;)
By changing the oscillator to something faster than the chip is rated you are effectively overclocking it. You could possibly get a little more speed out of that 25mhz 040(which the warp engine guys already clocked to 28mhz,and apparently someone tried to clock it a bit faster,it may not of wanted to go 30mhz so they backed off to the odd value oscillator you have to get it to run reliably. in theory you could put a 40mhz 040 in it,and stick a 80mhz oscillator in and have a 40mhz warpengine(keep in mind they are dividing the clock by 2 here and that is what the 040 is getting).
Mech
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I think the answer you are looking for is the fact that no 68k actually reports it's clock frequency (like the x86 does), so Nic Wilson who wrote sysinfo used a timing loop to get a rough idea of the CPU frequency... You are lucky you get a figure as close as that actually! :)
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more than likely you may have a 55.80mhz oscillator in the warp engine.
No. I don't have a Warp Engine, but a Blizzard 1230 MK4, and these are exactly 50 Mhz.
A 50 mhz '030 on a Blizzard 1230 MK4 will simply give you 50 million clock cycles. My speed testing software (for measuring the speed of a routine, or even individual instructions) clearly shows this. SysInfo isn't accurate here, and I think this is a known fact.
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Doesn't running SysInfo in PAL or NTSC mode produce slightly different speed results (i.e. NTSC reports slightly faster).
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And on RTG screen you get weirdo results that depend on the refresh - the reference is probably taken from VBlank.
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SysInfo reports 51.80Mhz with my Blizzard 1230IV running in PAL mode.
When turning the screenmode in DblPAL Hires No Flicker, SysInfo
reports 55.80Mhz... So, I think it has to do with different screenmodes.
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Man I hate repeating myself!
http://www.amiga.org/forums/showpost.php?p=661118&postcount=13
AIBB is far more reliable than SysInfo for CPU speed determinations (except on 68060). I guess some people just love to beat a dead horse?
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Man I hate repeating myself!
http://www.amiga.org/forums/showpost.php?p=661118&postcount=13
AIBB is far more reliable than SysInfo for CPU speed determinations (except on 68060). I guess some people just love to beat a dead horse?
Cool I will have to check that out. I have another Warp Engine card 040 @40mhz...yet shows 44mhz on sys
Info. :). It is not critical really just playing around with the goodies. It just amazes me at the growth and innovation of the Amiga and the 3rd party companies back in the day!! Glad to be part of it then and now.
Rich.
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You could also try sysspeed, thats a nice benchmarking tool :)
http://aminet.net/package/util/moni/sspeed26
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You could also try sysspeed, thats a nice benchmarking tool :)
+1. It's one of the few that gets my overclocked 68060@75MHz correct.