9 May
2010
9 May
'10
7:01 p.m.
Tony Duell wrote:
Definately 8bit parallel both of them. Where inthe world does this
cruft come from?
Bit serial means data paths and work is done that way but
the native data format can be anything from 5bits (a trainer
I'd seen once) to more than 30bits. It can even be BCD!
Good example PDP-8 a parallel 12bit machine, PDP-8S a bit
serial implementation of same (cheaper).
Allison
So, the
National SC/MP and RCA 1802 were 1-bit microprocessors?
I've heard this said about the SC/MP before, but the data sheet shows an
8-bit parallel ALU. Do you have any docuemtnation which claims it's
bit-serial?
That's
sure to start a fight somewhere...
If you take the ALU size, then the P850 becomes an 8-bit machine
(everybody considers it to be 16 bits, which is the logical size to a
proggrammer). And what size is the HP9830? The ALU in there is bit-serial
form binary operations and 4 bits wide for BCD operations.
As I hope we've all seen by now, you often
can't quote a single 'bit
count' for a machine that's applicable in all cases.
-tony