Personal Computer User's Guide
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Parallel Port configures the system’s built-in parallel port. Parallel Port can be set to
378h, to alternate addresses 278h
or 3BChor to Off to disable the port.
The default is 378h; you should leave it at that setting unless an expansion card needs
to use that address.
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Parallel Mode controls whether the system’s built-in parallel port acts as an AT-
compatible (unidirectional) or PS/2-compatible (bidirectional) port.
Your system also supports Extended Capabilities Port (ECP) mode, which can be used
by the Windows 95 operating system. Windows 95 uses ECP protocol automatically
if it detects an ECP-capable device.
Set Parallel Mode according to the type of peripheral device connected to the parallel
port. To determine the correct mode to use, see the documentation that came with
the device.
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IDE Hard Disk enables or disables the system’s built-in EIDE hard-disk drive interface.
With Auto (the default) selected, the system turns off the built-in EIDE interface as
necessary to accommodate a controller card installed in an expansion slot.
As part of the boot routine, the system first checks for a
primary
hard-disk drive con-
troller card installed in an expansion slot. If no card is found, the built-in EIDE interface
is enabled and the controller on the master EIDE drive is designated as the primary
controller, using IRQ14. If any EIDE drives are attached to the secondary EIDE chan-
nel, IRQ15 is also used.
If a primary controller is detected on the expansion bus, the built-in EIDE interface is
disabled.
Selecting Off disables the built-in EIDE interface.
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Diskette controls the operation of the system’s built-in diskette drive controller.
With Auto (the default) selected, the system turns off the built-in diskette drive con-
troller as necessary to accommodate a controller card installed in an expansion slot.
With Write-Protect selected, nothing can be written to diskette drives and tape drives
using the system’s built-in diskette drive controller. (The system can still read from the
drives.) When Write-Protect is selected, the Auto setting is also in effect (the system
turns off the built-in diskette drive controller as necessary).
Selecting Off turns off the built-in diskette drive controller; this setting is used prima-
rily for troubleshooting purposes.
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