Radio Shack TRS-80 Model II Reference Manual page 31

Model II TRSDOS
Introduction
You can enter a library command whenever the TRSDOS READY prompt is
displayed. (Programs can also call library commands. See
Technical
Information. )
The following commands use memory addresses from X'2800' to X'2FFF:
ANALYZE
APPEND
BUILD
COpy
CREATE
DUMP
ERROR
HELP
KILL
LIST
MOVE
PRINT
PURGE
RECEIVE
SETCOM (also SVC 55)
VERIFY
The following library commands use memory from X'2800' to TOP:
Single-Drive COPY
MOVE
RECEIVE (data goes into user area)
Other library commands use memory
below
X'2800'.
Exit Conditions of Library Commands
Any command executed from the TRSDOS READY level will return to TRSDOS.
Most library commands executed from another program can return to the program,
if the program uses this capability (see SVC 38, RETCMD).
However, the following library commands will
always
exit to TRSDOS READY:
SPOOL ON
DEBUG ON
DO (exits to begin the first command in the Do-file)
HOSTON
MOVE
Single-Drive COpy
To continue program execution after any of these commands, you may use a
00-
file
containing library commands and ending with a command to load and execute your
program.
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