<From: Captain Napalm <spc_at_armigeron.com>
< I think the PDP-11 has only three things in common with the Alpha:
<
< D E C
ROTFL-TB!!!
Sorta like my earlier answer about x86 VS PDP-11...
< If the PDP-11 is anything like the VAX in terms of instruction space, i
<might be possible. The only hitch is unaligned reads/writes to memory (I
Similar to vax. PDP11 is a word machine and instruction words must fall
on even addresses.
< I don't think so. The current trend in CPU design in away from comple
<instruction sets (which is something the VAX is) and more towards simplif
PDP-11 was a very CISC machine.
< Check bask issues of Byte (pre '88 - your local library or university
<library might have them). Full schematics for a slew of computers (mostl
<from Steve Ciarcia) and in the Sep/Oct '85 issues the schematic for a CPU
<Ah, if only I had the time and equipment ...
EGO, I have those issues. simple but not a good design as the sequencer
is really complex and microcoded would have been far far simpler and
easier to debug. Otherwise it tried to copy the two address scheme
PDP11 used but it's not orthogonal.
Allison
Received on Wed Apr 22 1998 - 19:22:02 BST