Bench graphique en assembleur sur CASIO Z-1GR

[zork750]

fil très intéressant,

@dprtl merci pour le UP,

et surtout merci à charognard pour toute les informations contenus et les dev sous assembleur.......

@+

[Xerxes]

Hi Xerxes,

What is your source for this very plausible 3.68 MHz clock rate ? A normal TS80L188EB8 microprocessor should run at 8 MHz. Is it a Casio underclocking ?

Hi Daniel,

I noticed, that the sources in the net are contradictory about the clock rate of the FX-890P line. So I opened my Z-1GRA and
found a 7.36 MHz resonator that means 3.68 MHz internal clock rate in this case. Additionaly I made some assembly language
benchmarks to confirm the frequency.

The discussion about the clock rate of the PC-G850, PC-G850S and PC-G850V in another thread shows also, that even the
japanese sources are sometimes incorrect.

[charognard]

De rien, c'était avec plaisir

[Xerxes]

Daniel, I've read your calculator blog and saw that you are disappointed about the speed of the PB-1000
compared to the PB-2000C with BASIC. The reason is the lack of the CLEAR statement in your test program,
due to the variable handling of this BASIC dialect.

Furthermore you pointed out the missing internal timer of the PB-2000C. The timer is present but disabled
while the PB-2000C is off because of avoiding conflicts with the ROM cards. So the time, date and alarm
functions of the PB-1000 were removed, but the BASIC random generator command RND(-) uses the timer.
It's also possible to use the timer through assembly languange. An example is using the PB-2000C as a
desktop clock.

[dprtl]

Thank you Xerxes, for your comments, and for all information you give. I will re-edit my blog to publish only true things ; as far as I know.

I scanned a diagram from my japanese Z-1 / FX-890P manual :

https://app.box.com/s/pwuubkr3nkxccpbolzvp

... as you already know it, there is indeed a 7.37 MHz oscillator connected to the CLXIN of the TS80L188EB-8.

Extract from the Intel's datasheet :
CLocK INput : is an input for an external clock. An external oscillator operating at two times the required processor operating frequency can be connected to CLKIN. For crystal operation, CLKIN (along with OSCOUT) are the crystal connections to an internal Pierce oscillator.