Commodore 128D - Redefining Function Keys; Other Keys Used in C128 Mode Only; Help

KEY 5 prints DSAVE " on the screen. All you do is enter the
program name, and press RETURN to save the current
program on disk.
KEY 6 RUNs the current program.
KEY 7 displays a LISTing of the current program.
KEY 8 lets you enter the Machine Language Monitor. See
Appendix J for a description of the Monitor.
Redefining Function Keys
You can redefine or program any of these keys to perform a function
that suits your needs. Redefining is easy, using the KEY command.
You can redefine the keys from BASIC programs, or change them at
any time in direct mode. A situation where you might want to rede-
fine a function key is when you use a command frequently, and want
to save time instead of repeatedly typing in the command The new
definitions are erased when you turn off your computer. You can
redefine as many keys as you want and as many times as you want.
If you want to reprogram the F7 function key to return you to text
mode from high-resolution or multicolor-graphic modes, for example,
you would use the key command in this fashion:
KEY 7,"GRAPHIC 0" + CHR$(13)
CHR$(13) is the ASCII code character for RETURN. So when you
press the F7 key after redefining the key, what happens is the com-
mand "GRAPHIC 0" is automatically typed out and entered into the
computer with RETURN. Entire commands or series of commands
may be assigned to a key.
Other Keys Used in C128 Mode Only
Help As noted previously, when ydu make an error in
a program, your computer displays an error
message to tell you what you did wrong. These
error messages are further explained in Appen
dix A of this manual. You can get more assis
tance with errors by using the HELP key. After
an error message, press the HELP key to locate
the exact point where the error occurred. When
USING C128 MODE—Some BASIC Commands and Keyboard Operations Unique to
90 C128 Mode