DM1x Processor Speeds vs HP1x originals

Discussion of hardware issues related to the DM1x/DM41. Please ensure that you specifiy whether the issue is related to a credit card size unit or a "Voyager" unit (DM1xL/DM41L).
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reavy
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Location: Phoenix, AZ

DM1x Processor Speeds vs HP1x originals

Post by reavy » Thu Feb 08, 2018 3:44 am

Either my Google foo is not up to snuff or the information isn't available, but I was wondering if anyone knows the original clock speeds of the processors HP used in their calculators. I'm mostly interested in the HP-41 with the "Coconut" processor, but info for others would be welcome, too. This is mostly just to satisfy my curiosity about how efficient the emulation in the DM41 12MHz/48MHz is.
Last edited by reavy on Thu Feb 08, 2018 6:49 pm, edited 1 time in total.

grsbanks
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Re: DM1x Processor Speeds vs HP1x originals

Post by grsbanks » Thu Feb 08, 2018 8:53 am

If memory serves, the Voyagers' clock was set at 220KHz and that of the Coconuts was 340KHz.

This said, you can't compare clock frequencies of, for example, the DM41 and the HP-41C directly. In the first case, it's the clock of the CPU doing the actual work. In the second case it's the clock of the CPU emulating the one actually doing the work.

This said, the difference is significant. A kind of benchmark that was being explored on the MoHPC forum ran in 313s on the HP-15C and in 15s on the DM15L...
Not SwissMicros staff, just an enthusiast.

reavy
Posts: 21
Joined: Tue Feb 06, 2018 8:08 pm
Location: Phoenix, AZ

Re: DM1x Processor Speeds vs HP1x originals

Post by reavy » Thu Feb 08, 2018 6:48 pm

Yes, of course. I understand that you can't compare apples to oranges the bare metal original vs the emulated processors in the SM units.

Thanks very much for the info!

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