4 Aug
2012
4 Aug
'12
2:43 p.m.
Fred Cisin wrote:
Although it was theoretically possible to run TRS-DOS
2.0 and 2.1 in
16K, [would Micro-DOS, APR-DOS, DOS-PLUS, NEWDOS, VVTOS, L-DOS fit in
16K?], there are no confirmed reliable reports of anybody ever doing
so. Well, except for people who paid RS prices for their 4116s, and
how reliable are they?
Most if not all of the operating systems that were intended to be
capable of running software for Model I TRS-DOS 2.x were capable of
running on a 16K machine, because they had to confine themselves to
basically the same memory footprint as TRS-DOS for compatibility. To
squeeze in the added functionality, they used more overlays, and in some
cases reduced the size of the resident code to make the overlay area
slightly larger.
Some of the operating systems had optional features that would use high
memory. Those may or may not work on 16K or 32K systems.