12 Feb
2000
12 Feb
'00
4:38 a.m.
On Sat, Feb 12, 2000 at 11:44:58AM -0500, John B wrote:
I am more concerned about the incompatibilities in the
basic instruction
set.
Like what? If you mean the RTI/RTT thing and the thing about SWAB and
the V bit (I hope I have those right), it's *really* unlikely that any OS
code depends on either of those. The MOV SP,-(SP) thing shows up in other
models so the OSes should know better than to care about that (although IIRC
the DECUS DOS/BATCH BASIC actually *needs* that piece of 11/20 behavior and
won't run on some of the other early models), and similarly the /04 and /05
are missing SOB too so the small-machine OSes don't use that either.
John Wilson
D Bit