Commodore 128D - Built-In Commands; The Two Types of Cp;M 3.0 Commands

The Itoo Types off
CP/M 3.0
Commands
Built-in
Commands
As noted in Section 11, a CP/M 3.0 command line consists of a com
mand keyword, an optional command tail, and a RETURN keystroke.
This section describes the two kinds of commands the command
keyword can identify, and summarizes individual commands and
their functions. The section also gives examples of some commonly
used commands. In addition, the section explains the concept of
logical and physical devices under CP/M 3.0. This section then tells
how CP/M 3.0 searches for a program file on a disk, tells how to exe
cute multiple commands, and how to reset the disk system. Finally,
the section explains how to use the HELP command to get informa
tion on various CP/M topics including command formats and usage,
right at the keyboard.
There are two types of commands in CP/M 3.0:
• Built-in commands—which identify programs in memory
• Transient utility commands—which identify program files
on a disk
CP/M 3.0 has six built-in commands and over 20 transient utility com
mands. You can add utilities to your system by purchasing various
CP/M 3.0-compatible application programs. If you are an experi
enced programmer, you can also write your own utilities that operate
with CP/M 3.0.
Built-in commands are parts of CP/M 3.0 that are always available
for your use, regardless of which disk you have in which drive. Built-
in commands are entered in the computer's memory when CP/M 3.0
is loaded, and therefore execute more quickly than the transient
utilities. Table 14-1, on the next page, lists the Commodore 128 CP/M
3.0 built-in commands.
Some built-in commands have options that require support from a
related transient utility. The related transient utiltiy command has the
same name as the built-in command and has a f iletype of COM.
213 USING CP/M MODE—Summary of Major CP/M 3.0 Commands