Digital Equipment DEC 3000 Series Service Information page 16

System Overview,
System Module
(continued)
I/O Module
1–2
Continued

Controller for the TURBOchannel I/O bus

8-plane CXT buffer logic for base graphics

256 Kbyte Flash ROM (system ROM)

Three TURBOchannel option slots
The I/O module includes the following components:

TOY/NVR controller chip

Two serial line controllers

ISDN interface with audio I/O

Two SCSI controllers

Ethernet controller

256K byte of flash ROM

Three TURBOchannel option slots

High-performance two-dimensional graphics subsystem
The DEC 3000 Model 500/500S AXP system provides interfaces to

Serial lines

Ethernet

SCSI

ISDN

Audio in/out

Battery backed-up TOY

High-performance two-dimensional graphics subsystem
Continued on next page