[TUHS] Need a new PDP-11 or VAX?
peter at rulingia.com
Sun Apr 28 17:45:29 AEST 2013
On 2013-Apr-27 15:41:46 -0700, Larry McVoy <lm at bitmover.com> wrote:
>What I'd like is a new 64 bit PDP-11.
That might be fun to program in assembler but I suspect the
performance would suck. The ISA complexity implies a microcoded
implementation (with all the associated overheads). And compilers
generally have difficulty taking advantage of complex ISAs.
> That assembler was wonderful to
>read and write, only a short distance from C.
> x86 makes me puke.
Likewise. Warts upon warts... It's an abomination.
>and Alpha aren't much better (I was hoping for better from Alpha but they
>seemed like they copied MIPS).
I disagree on the Alpha. Apart from the idiotic decision to combine
imprecise exceptions with needing software support for IEEE FP, I
thought it was a very clean and well designed architecture. It wasn't
fun to program in directly but it was intended for use with compiled
languages. The designers went to a fair amount of effort to avoid
embedding bottlenecks in the language.
For anyone who's into really CISC architectures, check out the iAPX432.
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