.COM files
The other .COM files all contain transient commands (listed in
Table 14.2.).
HELP.COM displays messages, held in HELP.HLP (whose
extension indicates it is a data file not a program file), about the
C128 CP/M system and its commands. If you are not familiar
with CP/M and have no other manuals or books about it, you
may find it useful to print out any HELP you look at. Pressing
CONTROL and P causes any screen output also to go to the
printer: pressing CONTROL P again turns off this facility.
Enter HELP for the list of subjects covered, or HELP C128 CP/M
for information specific to this implementation. (The character in
the middle of C128 CP/M is obtained by pressing the left arrow
key at the top left of the keyboard.) If you are printing and do not
want pauses after each screenful, then enter HELP C128 CP/M
[NOPAGE.
See page 14-8 for more information on Getting Help.
Other files
.ASM indicates an Assembler source file.
.RSX indicates a Resident System extension, which is a file
automatically loaded by a command file as and when it is
needed.
GETTING STARTED WITH CP/M 3.0
The following paragraphs tell you how to start or "boot” CP/M
3.0, how to enter and edit the command line, and how to make
back-up copies of your CP/M 3.0 disks.
Loading or Booting CP/M 3.0
Loading or “booting” CP/M 3.0 means reading a copy of the
operating system from your CP/M 3.0 System Disk into your
computer’s memory.
You can boot CP/M 3.0 in several ways. If your computer is off,
you can boot CP/M by first turning on your disk drive and
inserting the CP/M 3.0 system disk, and then turning on the
computer. CP/M 3.0 then loads automatically. If you are already
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