[HECnet] MACRO-11 cross assembler for VMS

[Steve Davidson]

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
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