Posts: 136
Threads: 31
Joined: Nov 2005
Hi Erik!
Thanks a lot for your input! The info of the effect of speeding up the machine on the system clock is particularly valuable to me! Just for your info: I'm using a 512KB card by Cynox (Germany) in my HP48GX (normal speed) and there seems to be no (significant) draining of the batteries. So, I guess, the machines hunger for batteries is mainly due to the overclocked CPU ... I'm not sure on this, however ... Thanks again!
Juergen
Posts: 1,788
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Joined: Aug 2007
The power consumption of a CMOS circuit generally scales in direct proportion to the clock rate. Boost the clock 50 percent, power goes up 50 percent. I suspect if a modified machine really eats the batteries it is caused by the RAM chips. If any input or bidirectional pin on a CMOS chip is left floating, that one pin can cause the chip to draw a HUGE amount of power.