Technical data

BIOS Setup Utility
2-9
DIGITAL PC 3500/5510
Menu Fields Settings Comments
I/O Device Configuration
Serial port A
Auto*
Disabled
Enabled
OS Controlled
Enables or disables onboard serial port A at the specified
address.
Select
Auto
unless interrupts IRQ4 and/or IRQ3 are
allocated as a computer resource.
Two devices cannot share the same IRQ. Choosing
Disabled
makes serial port A unusable. If you select
Auto
, Setup configures COM1 to address = 3F8h and IRQ
= 4 if they are available.
Auto
is the recommended setting.
Parallel port
Auto*
Disabled
Enabled
OS Controlled
Enables or disables the onboard parallel port. When set to
Enabled
, the parallel port can be configured as
necessary. The default configuration is address = 378 and
IRQ = 7 if they are available.
Parallel port mode Sets the onboard parallel port mode.
Output only
Standard printer connection.
Bi-directional*
PS/2 compatible mode and able to receive data.
EPP 1.7
EPP 1.9
Enhanced parallel port mode.
Selection based on what EPP version the printer supports.
Only choose a mode that the parallel port device (such as
a printer) supports. Check the parallel port device
documentation for this information. If this information
cannot be located, use the default setting.
ECP
Extended capabilities port mode.
Floppy diskette
controller
Enabled*
Disabled
Enables or disables the onboard diskette controller.
Exchange diskette
drives
Disabled*
Enabled
Logically exchanges physical diskette drive designations.
Diskette write protection
Disabled*
Enabled
Enables or disables the selected diskette drive’s write
protect option.
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