Commodore 128D - Assigning Logical Devices; Redirecting Input and Output

Redirecting Input
and Output
Assigning Logical
Devices
CP/M 3.0's PUT command allows you to direct console or printer
output to a disk file. You can use a GET command to make CP/M 3.0
or a utility program take console input from a disk file. The following
examples illustrate some of the capabilities offered by GET and PUT.
You can use a PUT command to direct console output to a disk file
as well as to the console. With PUT, you can create a disk file con:
taining a directory of all files on that disk, as shown in Figure 14-1.
A>PUT CONSOLE OUTPUT TO FILE DIR.PRN
PUTTING CONSOLE OUTPUT TO FILE: DIR.PRN
A>D/fl
A: FILENAME
A: FOUR
A: TWO
TEX : FRONT
TEX : ONE
TEX : THREE
TEX
TEX
BAK
AyTYPE DIR PRN
A: FILENAME TEX : FRONT TEX
A: FOUR TEX : ONE TEX
A: TWO TEX : THREE BAK
FRONT
LINEDIT
EXAMP2
BAK : ONE
TEX : EXAMP1
TXT
FRONT BAK : ONE
LINEDIT TEX : EXAMP1
EXAMP2 TXT
BAK : THREE
TXT :TW0
BAK : THREE
TXT : TWO
TEX
BAK
TEX
BAK
Figure 14-1. PUT Command Example
A GET command can direct CP/M 3.0 or a program to read console
input from a disk file instead of from the keyboard. If the file is to be
read by CP/M 3.0, it must contain standard CP/M 3.0 command lines.
If the file is to be read by a utility program, it must contain input
appropriate for that program. A file can contain both CP/M 3.0 com
mand lines and program input if it also includes a command to start
a program.
The minimal Commodore 128 CP/M 3.0 hardware includes a console
consisting of a keyboard and screen display, and a 1571 disk drive.
You may want to add another device to your system, such as a
printer or a modem. To help keep track of these physically different
input and output devices, Table 14-3 gives the names of CP/M 3.0
logical devices. It also shows the physical devices assigned to these
logical devices in the Commodore 128 CP/M 3.0 system.
u
u
u
U
U
LJ
U
216
USING CP/M MODE-Summary of Major CP/M 3.0 Commands