Does anyone know what speed (Hertz) the original HP-41 CPU ran at?
vic
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HP 41 CPU speed
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02-05-2002, 03:15 PM
Does anyone know what speed (Hertz) the original HP-41 CPU ran at? vic ▼
02-05-2002, 11:06 PM
The buses ran at about 355KHz, but each machine cycle was 56 clock pulses long; the machine would execute about 6300 machine instructions per second. Needless to say, it would take several machine instructions to implement each of the various HP41 functions that you could write user programs in. The calculator had just 12K of 10bit words worth of ROM (20K for the HP41CX, since it included the x-functions and the time modules). Amazing, no? /ji
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02-06-2002, 04:32 AM
John wrote:
"The buses ran at about 355KHz, but each machine cycle
I guess the reason is that each 71B's machine cycle
Another fact I find curious is that the 41C could
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02-06-2002, 07:22 AM
> Hats off to the algorithm designers and coders!
Absolutely my opinion too. I had a closer look to the firmware when I did an emulator of the HP-41. That is the reason for the leitmotiv of my homepage: "Wer einen anderen nachahmt, erkennt dessen Überlegenheit an." See: http://ourworld.compuserve.com/homepages/nutem/ Ciao.....Mike |