Compaq Prolinea Family Maintenance & Serice Manual page 19

o Measures 8.5 x 13.75 inches (21.6 x 34.9 cm)
586-Based Board Without Integrated Graphics
The 586-based system board without integrated graphics has the following
characteristics:
o Used on 3-slot/3-bay and 4-slot/4-bay computers
o Designed for use with QVision 2000+ Graphics Controller in a PCI slot
o Six SIMM sockets for memory expansion
o Accommodates 586/75 and 586/90 processors (320-pin ZIF socket)
o 256 KB cache memory
o Measures 8.5 x 13.75 inches (21.6 x 34.9 cm)
IDE Interface
The IDE interface consists of two IDE connectors that support up to four
IDE devices. Each connector can be individually disabled so that option
card IDE interfaces will work.
Diskette Drive Interface
The diskette drive interface is 8477 compatible.
Serial Port
The serial port is RS-232C compatible.
Parallel Port
The following parallel support modes are supported:
o SPP (Bi-directional Standard Parallel Port)
o EPP (Enhanced Parallel Port)
o ECP (Extended Capabilities Port)
Keyboard/Mouse
All system boards will accommodate a standard 8042 keyboard/mouse
controller.
Processor
The 486-based system boards support a variety of 486 processors at bus
frequencies of 25-MHz and 33-MHz. These boards have a reconfigurable ZIF
socket to accommodate the variety of processor pinouts and supports 3.3V
and 5V processors. These system boards can be upgraded to a 486DX4/100