IBM 6589 - PC 365 - 32 MB RAM, Руководство пользователя, Страница: 17 / 66

Chapter 2. System Board Features
Bus Master EIDE Interface
The system board incorporates a PCI bus master, enhanced integrated drive electronics (EIDE) interface
that complies with
AT Attachment Interface with Extensions; this allows concurrent operations on the PCI
and EIDE buses.
The subsystem that controls internal devices is integrated with the EIDE interface. Up to four IDE devices
can be attached to the system board through a ribbon cable that connects to one of two connectors on the
system board. The IDE devices receive their power through a four-position power cable cont5,
+12, and ground voltage.
When devices are added to the EIDE interface, one device is designated as the primary, or master, device
and another is designated as the secondary, or subordinate, device. These designations are determined
by switches or jumpers on each device. A bootable hard disk drive can be installed on either EIDE
connector.
Note: An IDE expansion adapter is not supported.
For a list of devices that might be installed in the computer, see “Internal Drives” on page 19.
The following table shows the system resources used by the EIDE interface.
Note: When the computer is started, the resource assignments are subject to change during the
power-on self-test (POST).
Two 40-pin connectors are provided on the system board for the EIDE interface. For information on the
pin assignments, see “EIDE Connectors” on page 33.
Table 2. System Resource Assignments for EIDE Interface
System Resource Assignment
ROM None
RAM None
I/O (hex) 170-177, 1F0-1F7, 376-377, 3F6-3F7
IRQ 14, 15
DMA None
Chapter 2. System Board Features
7