7 Mar
2020
7 Mar
'20
1:15 a.m.
Bob,
PDP-11 comparability mode started in the VAX11-780 as microcode and later went to software
emulation as time went in. The environment was from day one RSX-11. It included most of
the files necessary to cross build for RSX hosts, including MACRO-11.
One of my systems runs the emulator. If I have a chance I will bring it up this weekend
and add an account for you with proxy access.
-Steve Davidson
SF:iP1
On Mar 6, 2020, at 18:46, Thomas DeBellis
<tommytimesharing at gmail.com> wrote:
?
Didn't early Vaxen (11/780) also execute PDP-11 code? I would imagine there would
have been a PDP-11 assembler, but it might have been a (RSX?) PDP-11 based one hosted on
VMS. I also (briefly) used the VAX assembler. Anyway, there would have been no need for
a cross assembler.
The IBMSPL product for Tops-20 came with PDP-11 source code for the DN60. I remember
building images for execution, typically for simple things like tweaking the EBCDIC/ASCII
translate tables to make somebody happy. What would have been nice would have been to
change them on the fly, but we never bothered. I also fixed a small bug for HASP. Or at
least I think I remember I did...
All I have now are the DN60 (simulated) JSYS files, which give an interface to
communicate with the DN60 over the DTE. These are in MACRO-10. No IBMSPL, not front end
stuff. Maybe I'll stumble over it one of these days.
On 3/6/20 5:58 PM, Robert Armstrong wrote:
> Does anybody know if there?s a PDP-11 MACRO-11 cross assembler for VMS? I don?t
want to set up a whole PDP-11 simulation just to assemble one file J
>
> Bob