Motherboard - Digital Equipment 3300R Service Manual

Motherboard

The motherboard provides a standard set of I/O functions:
•
An ultra SCSI controller chip (Qlogic) that supports up to seven SCSI drives: Up to
three narrow SCSI removable media devices, and up to four wide SCSI hard disk
drives.
•
The firmware console subsystem on 1 Mbyte of flash ROM
•
A floppy drive controller
•
Two serial ports with full modem control and a parallel port
•
The keyboard and mouse interface
•
S3 Trio64V+ PCI video controller
•
The speaker interface
•
PCI-to-EISA bridge chipset
•
EISA system component chip
•
Time-of-year (TOY) clock
•
Remote console management PIC processor
•
Connectors:
—EISA bus connectors (Slots 1, 2, and 3)
—PCI bus connectors (32-bit: Slots 11, 12, and 13)
—PCI bus connector (64-bit: Slot 14)
—Memory module connectors (8 DIMM connectors)
—CPU daughter board connector
Figure 6-3 shows the motherboard and its connectors.
System Configuration and Setup
DIGITAL Server 3300/3300R 6–15