Specifications

CoreModule/PC Technical Manual
3-6
Hex Code Command
05h Backspace
0Ah Line Feed
0Bh Vertical Tab
0Ch Non-destructive Space
0Dh Carriage Return
Table 3-2. Terminal Cursor Commands
The Ampro ROM-BIOS contains support for serial input and serial output. Serial console support
parameters are stored in the board's Configuration Memory and are configured by the SETUP
function. SETUP parameters provide support for serial console input, such as a serial keyboard or
modem, and for serial console output, such as a serial display terminal or remote computer.
Assignment of the system's input device (keyboard replacement) and output device (display adapter
and screen) are handled separately. For instance, a standard PC or XT keyboard can be combined
with a serial display, or serial input can be used with a standard video display.
Caution
Be careful when changing the console configuration using
SETUP. It is possible to specify "none" for console input and
output, in which case there will be no console access to the
system. Should this occur, install a shorting block on J2-7/8.
This will cause the ROM-BIOS to default back to "Video" and
"Keyboard" for its console devices.
To allow an RS232C serial device connected to the system's serial port to be used as a system
console device, use the SETUP function to select the serial console option and configure the
appropriate parameters. Input and output parameters do not have to be the same. As an example,
the console output can be set to the primary serial port, 19.2K baud, 8 data bits and 1 stop bit, while
the console input can be set to the secondary serial port, 9600 baud, 8 data bits and 1 stop bit.
After booting the system with this configuration, data normally destined for a standard video display
controller and monitor will be routed to the external serial device instead. Keyboard data will be
obtained from the external serial device. (As a "safety factor", keyboard data will also be available
from a standard PC or XT keyboard, if present, unless the input device is specified as "NONE" in
SETUP.)
Most DOS versions initialize the serial ports to 2400 baud at boot time, overriding any values that
might be set by the BIOS or a BIOS extension. To preserve the serial console port parameters stored
in Configuration Memory, the ROM-BIOS has been modified to "hide" the COM port from DOS. It
does this by deleting the console port from the internal COM port table set by the BIOS that is used