22 Nov
2006
22 Nov
'06
4:18 p.m.
On 23 Nov 2006 at 12:09, Ethan Dicks wrote:
I think it's because it was the first home
computer that could run two
OSs *at the same time* -- ISTR there was a way to run an MS-DOS and an
Amiga OS program at the same time.
I've got a board that plugs into a 5150 (as a display adapter) and
takes the MDA display and combines it with RS-232 data coming in
from an external system and formats the display as
split-screen on a
VT220 terminal (the board also plugs into the 5150's keyboard
port).
There's no software that comes with the board--all of the smarts are
on the board in the form of a Z80 sharing display RAM with the 5150.
Were there any good reason any of the coprocessor boards for the
Apple ][ couldn't have been time-sliced with the main 6502?
Cheers,
Chuck