Acer Extensa 500, Service Manual

Page: 37 / 108

Chapter 2 37
System Security
The System Security screen contains parameters that help safeguard and
protect your computer from unauthorized use.
Base Address Sets the I/O address of the serial port.
Options: 3F8h, 2F8h, 3E8h or 2E8h
IRQ Sets the interrupt request of the serial port.
Options: 4 or 11
Parallel Port Enables or disables the parallel port.
Options: Enabled or Disabled
Base Address Sets the I/O address of the parallel port.
Options: 378h, 278h or 3BCh
IRQ Sets the interrupt request of the parallel port.
Options: 7 or 5
Operation
Mode Sets the operation mode of the parallel port.
Options: Bi-directional , ECP or Standard
ECP DMA
Channel Sets a DMA channel for the printer to operate in
ECP mode. This parameter is enabled only if
Operation Mode is set to ECP.
Options: 1 or 3
Parameter Description