Table of Contents
Advertisement
Section C:
Utility Programs
****************
*
$SPOOL
*
****************
C.l9.1.3. ABQ_RT - Abort Printing
This option serves as an emergency break if for some reasons,
the list-
ing does not please you at all. You type:
$SPOOL +ABORT
and printing is immediately aborted.
The program replies with the mess-
age
Printout aborted.
C.l9.1.4. PAGE - Suppress Form Feeds
As
previously mentioned,
$SPOOL is so kind to automatically
insert
a
form feed every 64 lines.
This is convenient in most cases,
but it can
be
very
disturbing.
If you want to renounce form feeds,
specify
the
corresponding option after the filename:
$SPOOL filename -PAGE
In this case, $SPOOL will not insert form feeds by itself.
C.l9.2. Additional Information for Connoisseurs
For everyone who wants to know precisely: The
~unction
module $SPOOL.RSX
intercepts EOS system calls 1, 2, 5, 9, 10, 11 and 111. Furthermore, the
vectors 3,
4,
5 and 6 in the BIOS jump vector table are altered such a
way that programs which do console I/0 directly via the BIOS jump vector
are also affected.
All EOS calls, with the exception of system function
10,
have
a priority less than that of the CRT screen.
More precisely,
the printer is polled on each eighth CRT output,
resp.
status check in
order not to slow down screen output more than necessary.
Serial print-
ers
should be operated at a maximum speed of 1200 baud,
as
this
will
result in the least loss of screen output speed.
EOS User's manual
Daeum1ing & Zimmermann
Page 98
Advertisement
Chapters
Table of Contents
