MESA Electronic 4C27, Руководство пользователя, Страница: 20 / 32

CPU OPERATION
SETCTSIO
The serial and parallel port settings can also be changed dynamically with the included setup utility
SETCTSIO.EXE. These setting are volatile, and will revert to the default settings at power up or
hardware reset. The setup utility can be run as part of your AUTOEXEC.BAT file.
SETCTSIO is invoked with one command line parameter, a configuration file name:
SETCTSIO COM3COM4.CFG
The command line parameter is the name of the configuration file. The configuration file is an
ASCII file containing the configuration parameters. The UTILS directory of the 4C27 distribution
disk has two example configuration files, COM3COM4.CFG and STANDARD.CFG. You should
use these files as a starting point to creating your own configuration files.
The format of the configuration file is very simple: each line of the configuration file consists of a
parameter name followed by a parameter value. If a parameter name is not specified in the
configuration file, that parameter will be set to the default value shown in the following table.
The parameter names, parameter values, and default parameter values are as follows:
PARAMETER PARAMETER VALUES DEFAULT
PP-ADDRESS OFF 278
278
378
3BC
The PP-ADDRESS parameter selects the location of the parallel port. The parallel port can be
disabled if desired by setting the parameter to 'OFF'
PARAMETER PARAMETER VALUES DEFAULT
PP-MODE UNI-DIRECT UNI-DIRECT
BI-DIRECT
The PP-MODE parameter sets the operational mode of the parallel port. The default uni-
directional mode is the standard printer port mode. When set to the bi-directional mode, bit 5 of the
printer control port determines the signal direction on the printer data lines. A low on bit 5 sets the
lines to the output direction, a high on bit 5 sets the data lines to the input direction.
Page 20
4C27 CPU USER'S MANUAL