30 Sep
2010
30 Sep
'10
11:49 p.m.
Argh, I wasn't going to post back but I
can't resist. Back in the 80's I
rewrote Xinu from C into 6502 assembly, and got very primitive multitasking
working on the Apple ][. I guess that counts as writing swtch :-)
ftp://minnie.tuhs.org/pub/apple2/apple2xinu.tar.gz
Along the same line: http://lng.sourceforge.net/
A unix-like system written for 6502 (not my doing, I just
find it cute). Its interesting because in several ways
the 6502's not really a great cpu for this kind of thing
(fixed location stack, not easy to write PIC code...).
But hey, if you can support 8 concurrent users on a 48k
pdp11, why not unix on a c64? :)
Warren
Tim Newsham | www.thenewsh.com/~newsham | thenewsh.blogspot.com