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1990-06-23
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62 lines
QUIET
Version 1.2
Gene Pizzetta
June 24, 1990
QUIET, originally written by Richard Conn, sets, resets, and
displays the ZCPR3 Quiet Flag, which determines how some programs
handle their screen displays.
USAGE:
QUIET {{/}option}
If no option is given, DISPLAY is assumed. A slash before the
option is allowed, but not required.
OPTIONS: Only enough letters are required for the option to be
unique. That is, only a single letter is necessary for all
options except ON and OFF, which require two letters.
DISPLAY Displays current state of quiet flag. This is the
default option.
SET Turns on (sets) quiet flag.
RESET Turns off (resets) quiet flag.
ON Turns on (sets) quiet flag.
OFF Turns off (resets) quiet flag.
If the wheel byte is off (reset), the SET/RESET and ON/OFF
options cause no display on the console. If an invalid option is
given, the program error code is set to 19 and the error handler
is invoked, if one is running.
HISTORY:
Version 1.2 -- June 24, 1990 -- Gene Pizzetta
It seems a little silly for QUIET to obey the quiet flag,
since the flag is apt to change while the program is
running. Instead, this version uses the wheel byte like a
quiet flag. Also added ON and OFF as alternate options for
SET and RESET. Made DISPLAY option the default. Now allows
leading slash for options. Added Type 3 header. Displays
version and load address only on the help screen. Sets
program error flag and invokes error handler if invalid
option is given. Now uses library routines for most
functions. Uses actual program name on help screen.
Version 1.1 -- Date and reviser unknown to me
I did not have access to the source code for version 1.1,
but the only difference from 1.0 appears to be observance of
the quiet flag for display of the help screen, the use of
Z80-specific opcodes, and printing the program name and
version number with the D option.
Version 1.0 -- March 29, 1984 -- Richard Conn