> I can settle this. I have the RT-11 and all the other disks from the
>syustem. If anyone is interested they can take the disks and find out how
>they were controlling the DSD devices.
I can settle this... The RT development group had mostly 11/23-based
systems using DSD880s of various types for a number of years, and we
ran the stock RT-11 system on them just fine.
As Jerome has pointed out, if we needed to use the additional RL of
an 880/30, we had to rebuild the DL handler, and the code was there
in the DY driver, though we typically didn't use it.
In addition, I can say that the P/OS development group used DSD880s
on 11/23-based systems to develop P/OS in the early days -- there was
a qbus board which they used to do the P/OS graphics. It was
programmed almost identically to what was eventually in the PRO.
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | email: mbg at world.std.com |
| Member of Technical Staff | megan at savaje.com |
| SavaJe Technologies, Inc. | (s/ at /_at_/) |
| 100 Apollo Drive | URL:
http://world.std.com/~mbg/ |
| Chelmsford, MA 01460 | "pdp-11 programmer - some assembler |
| (978) 256 6521 (DEC '77-'98) | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+
Received on Thu Jul 24 2003 - 00:07:00 BST