Hardware configuration

scologin problems on Unisys MPE-46651 systems

Your MPE-46651 system might hang during SCOlogin start and stop operations. If it does hang, set the variable kdm_doinb to 1 in the file /etc/conf/pack.d/kbmouse/space.c, relink the kernel, and reboot.

Use Video Configuration Manager for full graphical functionality

During initial installation, the NCR VGA adapter defaults to IBM VGA 640x480 16-color. To get the full functionality of your adapter, use the Video Configuration Manager after completing the installation.

PCI adapters requiring interrupts are recognized but do not work

Certain computers (in particular, some DEC models) have the ability to disable interrupts in the PCI BIOS. If an adapter is recognized but does not seem to be working properly, you can determine whether this is a problem by running hwconfig(C) and examining the output for the adapter. If the output contains the string vec=255, re-enable interrupts using your computer's hardware setup program. This does not apply to PCI adapters that do not require interrupts, such as graphics adapters.

Use full device names to format floppy disks

When you format floppy disks, you cannot specify the abbreviated device names /dev/rfd0 and /dev/rfd1. Use the full device names that specify disk density. For example, use /dev/rfd0135ds18 for the primary 3.5-inch floppy disk drive.

Keyboard selections

If you change the keyboard setting from the default during initial installation, your system might not be fully configured for the language you selected. Use the International Settings Manager to reconfigure the keyboard selection after installation if necessary.

Do not connect or disconnect keyboard mouse on a running system

Do not connect or disconnect a keyboard (PS/2-style) mouse on a running SCO OpenServer system, as this might cause damage to hardware on some systems. Always turn off the system before connecting or disconnecting a keyboard mouse.

Enhanced serial driver

The SCO OpenServer product contains an enhanced serial driver for use with your standard COM1 and COM2 and other supported non-intelligent serial boards as listed by the mkdev serial command.

The enhanced serial driver supports data speeds up to and including 115200bps. However, this is subject to the following hardware limitations:

• Serial ports without a 16550 UART chip are only supported at data rates up to and including 9600bps. Contact your serial board or system manufacturer to be sure you are using a serial board with a 16550 UART chip.

• Due to the rate at which interrupts can be handled and the speed at which the UART buffer is overwritten at high speeds, simultaneous data rates of 57600bps or higher are only supported on a single serial port at a time.