Chapter 2

SP 5200 Series
Chapter 2 - Switches & Jumpers

Figure 2-1, SP 5200Series Board Layout

Switch Settings

S1, Switch 1 and 2 - Supervisory Interrupt

The IES (Intelligent Environmental Sensor) module in the Density System communicates with the SP processors in the system via a hardware interrupt which is configurable as either IRQ 10 or IRQ 15. The interrupt is set with switch 1.

Note: The SP Series includes a secondary IDE controller for the Density System CD-ROM Drive. If this controller is enabled in the BIOS, it will use IRQ 15. If using the IES Supervisory System, its Interrupt must then be set to IRQ 10.

S1, Switch 3 - PS/2 Mouse IRQ

A PS/2 style mouse port is included on each SP processor. The mouse is connected to the SP board via the Density System multiplexer. If a mouse is not used, the port can be disabled to release the interrupt.

S1, Switch 4 - Not Used

Table 2-1, S1 Switch Settings

Function	1	2	3	4
Supervisory Interrupt IRQ 10	on	off
Supervisory Interrupt IRQ 15 *	off	on
No Supervisory Interrupt	off	off
PS/2 Mouse on IRQ 12 *			on
PS/2 Mouse on IRQ 12 Disabled			off
*Factory Settings (sw4 - not used)

Jumper Settings

Figure 2-1 shows the connector, switch and jumper locations on the board. Tables 2-2, 2-3 and 2-4 define jumper settings.

JP2 - Ethernet

The on-board DEC 21140 PCI Fast Ethernet (10/100 Mbps) controller can be disabled in the system BIOS and via hardware with jumper JP2.

JP3 - SCSI

The on-board Symbios 825A SCSI controller can be enabled or disabled in the system BIOS and via hardware with jumper JP3.

JP4 - Factory Test (Do not change)

Table 2-2, Jumpers JP2 to JP4

Jumper	Function	Jumper On Pins 1-2	Jumper On Pins 2-3
JP2	Ethernet	Enabled	Disabled
JP3	SCSI	Enabled	Disabled
JP4	Factory Test	N/A	N/A

JP1, JP5, JP6, & JP7 - CPU Voltage And Speed

Table 2-3, Jumper JP1 - CPU Core Voltage

Voltage	Pins 1-2	Pins 3-4	Pins 5-6
2.8V	OFF	OFF	OFF
2.9V	OFF	OFF	ON

Table 2-4, Jumper JP5, JP6 & JP7 - CPU Speed

Speed	JP5	JP6	JP7
166	1-2	2-3	2-3
200	1-2	1-2	2-3
233	1-2	1-2	2-3