8 May
2010
8 May
'10
10:25 a.m.
On 5/7/2010 4:30 PM, Chuck Guzis wrote:
Trying to find a universal way of classifying
processors seems to me
to be an exercise in folly, akin to angels dancing on the head of a
pin.
The PB-250 had a one-bit data bus and a 22 bit word length.
A PPU on a CDC 6000 series machine has 12-bit words but an 18-bit
accumulator.
The CDC STAR had 64-bit registers, but a 644-bit (IIRC) data bus.
The eZ80 has an 8-bit data bus, 24-bit registers with a 24-bit
addressing space and can performa a 16x16 multiply with a 32-bit
product, yet it runs Z80 code.
PB-250: 22-bit
CDC 6000 PDU: 18-bit
CDC STAR: 64-bit
eZ80: 24-bit
Seems pretty cut and dried to me.
--
Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/
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