11 Dec
2008
11 Dec
'08
10:31 a.m.
bfranchuk at jetnet.ab.ca wrote:
Any good leads as am still looking for a small boot
strapable langauge
here. Tiny C will not work
as my instruction set does NOT have register to register operations. I
plan to have a wopping
48Kb system as that was BIG memory 1975 ish.>>
Your best bet is to write a byte-code interpreter in your native
instruction set. If your architecture Turing-equivalent it doesn't
matter what operations are missing. Tiny Basic, UCSD Pascal, Logo,
Java, Scheme and lots of other languages have been implemented this
way. Sure, this might be slower than a "native implementation," but you
can always bootstrap a native compiler later if you have the time.
Byte-code interpreters typically run faster than "regular"
interpreters. If you can find it, I would recommend UCSD Pascal. It is
a full-featured language (structs/records, etc.). I ran this on the
Apple II in about the amount of memory you have.
11 Dec
11 Dec
10:47 a.m.
>>>> "Tim" == Tim McNerney <mc
at media.mit.edu> writes:
Tim> bfranchuk at jetnet.ab.ca wrote:
> Any good leads as am still looking for a small
boot strapable
> langauge here. Tiny C will not work as my instruction set does
> NOT have register to register operations. I plan to have a wopping
> 48Kb system as that was BIG memory 1975 ish.>>
>
Tim> Your best bet is to write a byte-code interpreter in your native
Tim> instruction set. If your architecture Turing-equivalent it
Tim> doesn't matter what operations are missing. Tiny Basic, UCSD
Tim> Pascal, Logo, Java, Scheme and lots of other languages have been
Tim> implemented this way.
So is Forth, with a twist: much of the implementation is itself coded
in Forth (i.e., in bytecode) so the amount of stuff you have to write
in assembler is very small indeed. In the PDP-11 implementation I
have, the "core" assembly code is 500 lines; there's a bunch more
stuff coded in assembler that doesn't actually need to be (I changed
it to assembler as an optimization). That may be another few hundred
lines, max.
paul
6172
days inactive
6172
days old
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