3 Mar
2008
3 Mar
'08
8:59 p.m.
Jim Brain wrote:
woodelf wrote:
A) Dma is cheating
B) Well two tty's at 110 baud must be high speed multi-tasking :)
I suspect any OS using the 6502 can't have multi-tasking OS
because you can't change page 0 or the stack page.
Define "change"?
LUnix and BOS (unfinished multitasker from the creator
of ACE), as well as my BRIX could "change" zpage and stack on a 6502.
It took either using the REU DMA or simply copying the page to another
location in memory, but it worked. Jim
.