Model
II
TRSDOS
Introduction
Model II TRSDOS
('
'Triss-Doss'')
is
a powerful and easy-to-use Disk
Operating System, providing a
full
set oflibrary commands
and
utility
programs. In addition, many ofthe most useful System routines can
be
called
directly by user programs.
Library commands are typed
in
from
the
TRSDOS command level
to
accomplish a variety
of
operations, including:
• Initialization
-setting
Printer
parameters, date and time, etc.
•
File-handling-copying,
renaming, deleting, protecting, etc.
• File
access-loading
into memory, listing to Printer or Display, etc.
•
Error
identification
See
the
Commands section for details.
Utility programs provide essential services like:
•
Formatting
blank diskettes.
•
Making
backup
copies
of
entire diskettes.
See
the
Utilities section for details.
System routines are executed via function codes instead ofcalls
to
absolute
memory addresses. Routines available
fall
into seven categories:
• System control
•
Keyboard
input
•
Video
Display input/output
•
Line
Printer
output
• File access
•
Computational
functions
• Serial communications
See
the
Technical Information section for details.
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