Date   : Wed, 12 Jan 1983 19:39:00-CST
From   : mknox@utexas-11.arpa
Subject: Hendrix disk formats, CP/M typeahead

Two matters;

Does anyone know any information about the disk format used by Hendrix
on their word processor systems.  The systems are PDP-11/34s and the
disks are single density (I believe), but beyond that I know nothing.
Before I attack their file structure by hand, any information forthcoming?


Typeahead --- isn't supported by CP/M as it comes from DRI.  Yet several
companies have implemented it in their BIOS (Pickles & Trout, I believe
InterSystem, etc.).  This works (with a few eaten characters) as long as
the ^S fix in not installed.  For those not familiar with the patch, it
fixes a bug where ^S would stop output ONLY if you had not hit another 
character first.

After the fix, CP/M reads any character typed during output to see if it
is a ^S.  If it is, fine.  If not, it just ATE the type-ahead.  Any 
solution?  Putting the ^S trap in BIOS is not really a good idea, as it
upsets binary I/O communication.