22 replies to this topic

[Lovecasio]

I earn enough money to by casio classpad 300. I want to know its processor speed SH7291. Is it faster then TI 89 or others old casio model.
I am always wait for your answer.

[PJay]

What the Casio ClassPad 300 processor speed ?

[EDCG]

Links

http://www.expresslo...-hitachish.html

http://america.renes...t/sh/index.html

[Daniel (CZE)]

CPU: SH-3
29.5 MIPS, OSC: 14.744 Mhz, Core/Bus Clock: 29.488 MHz. It should be faster than 12/15 MHz of TI.

[EDCG]

SH7290 cpu to 20Mhz see

URL http://america.renes...-2_Brochure.pdf

SH7291 classpad300 cpu to ?

[Daniel (CZE)]

I took information about CPU speed from PV SDK documentation, because PV has same CPU as CP. So I hope that these information are right.

[Lovecasio]

Hi.
Thankyou alot.
HiHi, I ask this question 9 months ago, a respond really made me happy.
Thanks again.

[EDCG]

Where encounter (PV SDK documentation).
Thanks
EDCG

[mastermage]

EDCG, isn't the classpad cpu a SH-3 ? your doc is for SH-2 family

[Daniel (CZE)]

Check this topic.

[qwerty841]

It should be faster than 12/15 MHz of TI.

I thought my v200 only had a 6 MHz processor

[Daniel (CZE)]

I don't know much about V200 hardware but my TI-92 Plus has officialy 12 MHz and unofficialy 12,7 MHz processor (benchmark test). V200 should be same or faster.

[mastermage]

anyway, the big difference is that the classpad processor has a RISC (reduced instruction set computer) cpu and the ti's a CISC (complex instruction set computer)
and the SH-3 should be faster than the m68000 because the SH-3 because it's much newer than the m68000

[Lovecasio]

Hi.
We know that the ClassPad 's processor speed is fast. You have Ti calculator, so may I ask you which one run faster ?

[Daniel (CZE)]

I calculated this expression on both CP and TI-92 Plus.

SIGMA(x,x,1,10000)

which means

1 + 2 + 3 + ... + 10000

TI's time: 17.12 s
CP gave me result immediately.

But it can be a better algorithm, not only faster CPU.

(ClassPad is slower in list operations.)

[Overlord]

probably CP is doing 10000*10001/2

[Daniel (CZE)]

CP has better CAS (in some parts) than TI, I think.

When I've tried some other calculation, except lists CP has been faster then TI.

[betoe]

I had saw that the 3D graphics are faster on the classpad, in comparison with the HP and TI.

[Griott]

Hello!, what we have found is that the processor has attached to it a crystal of 32 MHz, so can we say it is its real speed?
Thank you.

[mkanter]

you can't compare cpu speed only by comparing the the core clock speed.

if the cpu operates only on the LH-flank it is slower than one wich operates on the LH and the HL flanks.

Or if the cpu needs two clock cycles to do an calculation then this cpu is slower.

then you can't compare an risc with an cisc prozessor

------------------------
www.mkanter.de.vu

[betoe]

Look at this site, a site of a classpad distributor in Colombia (there is a guy of that site, member of this forum):
http://www.megabyte-...o_cp300_faq.htm

There is this text:
"La classPad 300 tiene un procesador Hitachi SH7291, RISC de 32 bits. Trabaja a una velocidad de 32 MHz. Tiene memoria de 4.5 MB, 500kb son de memoria en el area de usuario, y 4MB en el ?rea de aplicaciones y Add-ins."

In english:
Classpad 300 has a Hitachi SH7291 RISC processor of 32 bits. IT works at 32MHz....

[Griott]

Hello,

Yes, that`s our web site. We have put that information available to the public, but we are willing to correct it immediatly if something is incorrect. It`s likely for the statement " ..it works at 32 MHz..." not to be so correct, but not every -potential- customer will understand what is a crystal, so telling them that it has a 32MHz crytal inside doesn't add up. We just want to give the most acurate information to the public. But the fact is that, until this moment, we don't know the exact speed of the processor. Is there a program available to measure it, just like it happens with normal computer?.

Thank you.

[CPHopeful]

>>"anyway, the big difference is that the classpad processor has a RISC (reduced instruction set computer) cpu and the ti's a CISC (complex instruction set computer)
and the SH-3 should be faster than the m68000 because the SH-3 because it's much newer than the m68000"
----

Just to point out the SH-3 series is remarkably similar to the 68000 - so much so they've been sued countless times by Motorola. Definitely a CISC. Also, "newest" has nothing to do with a CPU's speed - by the early 90's you had 100MHz 68K and the latest incarnations (CF) are up to 333MHz. Low clock speed is simply to save battery life...

Honestly, if you want a fast, RISC processor, go with an ARM based calculator like the HP-49G+. The ARM can do a full instruction every 2 cycles, whereas the 68Ks take 8-300 cycles. But obviously processor speed isnt' the main attraction to a calculator.