Radio Shack TRS-80 PC-2 - Page 10

CLOADr
Load Reserve Program from RS-232C
CLOADr "filename"
filename is a standard, previously assigned file
name.
CLOADr loads the set of function key definitions and
menus (a "reserve program") from the RS-232C.
CLOADr
functions only when cassette input is routed
from the RS-232C (as with SETDEV CIl.
The syntax for CLOADr is identical to that for CLOAD.
For example, to load a set of function key definitions and
menus via the RS-232C, use the following command
sequence:
SETDEV CI
CLOADr
COM$
Fetch Communications Parameters
COM$ provides a way for you to examine the current
RS-232C settings. COM$ may be used in either the RUN
or PRO Mode as a direct command or part of a program.
This
function returns a string of characters defining the
current RS-232C setting, in format "baud, word, parity,
stop." (This is the same format SETCOM uses to set the
parameters.)
As with
any function, COM$ must be used in conjunction
with a command (such as PR INT COM$) or variable (as
in Z$ = COM$).
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It should be noted that COM$ always returns a string no
longer
than 16 bytes; therefore, it can be used safely
with
undimensioned string variables.
For example, if the RS-232C is currently set at 2400
Baud, 7 Bit Words, Odd Parity, and 2 Stop Bits, type:
PRINT COM$ (ENTER)
and the Display will show:
2400,7,0,2
During execution of a BASIC program, reset communica-
tion parameters to 300 baud, 8 bit words, even parity,
and 2 stop bits, execute subroutine 1000, then restore to
original settings.
100 A$ = COM$
110 SETCOM 300,8, E, 2
120 GOSUB 1000
130 SETCOM A$
CONSOLE
Set End-of-Line Protocol
CONSOLE x. Y. z
x sets
the number of characters sent and is
either 0 or a number between 16 - 255.
Y. z specifies to send a carriage return, line
feed,
or both. y, z is a combination of 0
and 1. See Table 3 for details.
CONSOLE
is used to specify the combination of line
feeds
and carriage returns transmitted as an end-of-line
symbol.
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