Acer 390 Series Service Manual page 137

Table 3-3 Onboard Devices Configuration Parameters
Parameter
DMA
Internal Modem
Base Address
IRQ
Parallel Port
Base Address
IRQ
Operation Mode
ECP DMA Channel
BIOS Setup Information
Sets the DMA (direct memory access) channel of the infrared
port
Enables or disables the internal modem
Sets the I/O base address of the internal modem
Sets the IRQ channel of the internal modem
Enables or disables the parallel port
Sets the I/O base address of the parallel port
Sets the interrupt request (IRQ) channel of the parallel port
Selects the operation mode of the parallel port.
ECP (Extended Capabilities Port) supports a 16-byte FIFO (first
in, first out) which can be accessed by host DMA cycles and PIO
cycles, boosting I/O bandwidth to meet the demands of high-
performance peripherals.
Sets the DMA channel of the parallel port when the parallel
operation mode is set to ECP.
Description Setting
3
1
Enabled
Disabled
3E8h
3F8h
2F8h
2E8h
11
5
3
4
10
Enabled
Disabled
378h
278h
3BCh
7
5
Bi-directional
ECP
Standard
1
3
3-7