I would like to announce release 2 of the CDC 1700 simulator. The major changes
include:
1. Fix protect fault for 2-word instructions so that background task
now work correctly
2. Lay the ground work for supporting the enhanced instruction set of
later
Cyber-18 series processors
3. Fix disk layout bug (Disks are not backwards compatible with
previous version)
4. Add debugging support for displaying MSOS 5 system requests
5. Fix various problems found by Coverity
Fix #1 means that the Macro Assembler and Fortran compiler are now functional.
I’ve also added some utilities to simtools for manipulating .tap files
(creating, extracting and
copying) along with a utility for handling COSY archives (COSY is a run-length
encoding
scheme used on the CDC 1700 for storing source card decks). Bitsavers has tapes
containing
source archives for the Macro Assembler, the Fortran compiler and MSOS 4.
The install tape I’ve been using was created by CDC explicitly for Exxon’s 1784
system. It
includes device drivers for a 1752 drum, a 1743-2 asynchronous communications
controller
and a 1728/430 card reader punch. I have documentation for the card
reader/punch but if
anyone has documentation for the 1752 or 1743-2 I would appreciate hearing
about. In fact I
would be interested in any 1700/Cyber-18 documentation.
I believe that it should be possible to generate a new system from scratch
including whatever
peripherals are available in the simulator. In order to do this I would need a
copy of the
MSOS 5 customization guide - bitsavers has a preliminary copy of the MSOS 4
version but
that may not be sufficient.
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