System information

6-18
AlphaServer 800 Service Guide
6.2.3 Motherboard
The motherboard provides a standard set of I/O functions:
• A fast, wide SCSI controller chip (Qlogic) that supports up to seven fast wide
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 Trio64 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.