Parallel Port Operation Mode - Acer Extensa 610 User Manual

6.4.7

Parallel Port Operation Mode

The parallel port supports four operation modes:
Standard and Bidirectional
Extended Capabilities Port(ECP)
Standard and Unidirectional
Enhanced Parallel Port(EPP)
ECP or Extended Capabilities Port supports a 16-byte FIFO (first in, first
out) which can be accessed by host DMA cycles and PIO cycles. ECP
boosts
peripherals. EPP or Enhanced Parallel Port is a parallel port interface that
greatly improves performance for bi-directional block-mode data transfers.
EPP provides greater throughput by supporting faster transfer times and a
mechanism that allows the host to address peripheral device registers
directly.
The default setting is
ECP DMA Channel
Set the ECP DMA Channel parameter if you set the Parallel Port Operation
Mode to
value, with ECP selected, is
6-12
I/O bandwidth to meet the demands of high-performance
[Standard and Bidirectional]
If you set EPP as the parallel port operation mode, do not use
3BCh as the parallel port base address; otherwise, I/O conflicts
may occur.
[Enhanced Capabilities Port(ECP)]
.
[0]
.
. The default
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