16 Jan
2012
16 Jan
'12
6:16 p.m.
I assume that it would be extremely difficult,
probably not worth the
effort, to modify the high order byte of the MFPT instruction at this
point for the 3rd party PDP-11 CPU boards, such as from Mentec.
Can anyone comment on this assumption? Might there be another
way for hardware to the tell a user which 3rd party board is being
used as a PDP-11?
Late versions of 11M+ use some fine details (timing?) to differentiate between a J11, and
the Mentec M1 and M100 (not J11 based).
Most of the 3rd party boards (including much of the Mentec stuff) are "just
J11's" maybe sped up/speed selected.
Tim.