20 Oct
1998
20 Oct
'98
1:01 a.m.
My pet peve is the IBM PC when launched was clocked at
a rather poor
4.77mhz when most of the s100, multibus and generally everyone else
that went with 16bits were looking for 8mhz or faster if possible.
It saved a few dollars but not enough. At least DEC had a z80 in
there to also do IO (instead of the IOC).
Jep, Even the Z80 was at 6MHz at this time - But to be
honest we have to agree that the basic design of the PC
was just intended ans a more flexible terminal, and this
basic design was enhanced for the PC...
< P.S.: The hate-segmentation-rantig against the x86
also drives
< me mad - the segmentation sceme used is a very good compromise
< between usability and performance. Loosing up to 15 Bytes
< per segment isn't realy a drawback compared to granularities
< of 4 or 8K today ...
To me segmentation was just another bag on the side to
get 16bits to
address more.
Jep right, and a very andsome way to deliver relocable adressing
and simple memory management.
The other half is that MMU granularity makes sense for
its time but with
modern OSs eating megabytes for the kernel Even segments don't allow
enough.
:))))
Unix and MS ...
H.
--
Ich denke, also bin ich, also gut
HRK