486 PSD Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	25/33/50(internal)/50/66(internal)/66MHz
Chip Set	SIO
Max. Onboard DRAM	64MB
Cache	64/256KB
BIOS	Award/AMI
Dimensions	330mm x 218mm
I/O Options	32-bit PCI slots, SCSI interface, PS/2 mouse port
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Turbo LED	J11	IDE interface LED	CN1
Turbo switch	J12	SCSI interface	CN3
Reset switch	J13	PS/2 mouse	CN5
Speaker	J14	32-bit PCI slots	S1, S2, S3
Power LED & keylock	J15

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	SCSI power from system	J1	Closed
	SCSI power from peripheral device	J1	Open
»	BIOS type select - Award	J7	pins 1 & 2 closed
	BIOS type select -AMI	J7	pins 2 & 3 closed
»	Factory configured - do not alter	J9	pins 1 & 2 closed
»	Factory configured - do not alter	J10	pins 1 & 2 closed
»	CPU type select - PGA	JC5	Closed
	CPU type select - PQFP	JC5	Open
»	Parity error disabled	JF1	pins 1 & 2 closed
	Parity error enabled	JF1	pins 2 & 3 closed
»	CPU generation parity	JF2	pins 1 & 2 closed
	DPU generation parity	JF2	pins 2 & 3 closed
»	Cache wait state disabled	JF5	pins 2 & 3 closed
	Cache wait state enabled	JF5	pins 1 & 2 closed
»	Factory configured - do not alter	JF6	pins 1 & 2 closed
»	7-bit tag address	JF7	pins 2 & 3 closed
	8-bit tag address	JF7	pins 1 & 2 closed
»	L2 cache enabled	JF8	pins 2 & 3 closed
	L2 cache disabled	JF8	pins 1 & 2 closed
»	Cache select - 256KB	JS1	pins 2 & 3 closed
	Cache select - 64KB	JS1	pins 1 & 2 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
2MB	(1) 256KB x 36	(1) 256KB x 36	NONE	NONE
4MB	(1) 256KB x 36	(1) 256KB x 36	(1) 256KB x 36	(1) 256KB x 36
5MB	(1) 1M x 36	(1) 256KB x 36	NONE	NONE
4MB	(1) 1M x 36	(1) 256KB x 36	NONE	NONE
7MB	(1) 1M x 36	(1) 256KB x 36	(1) 256KB x 36	(1) 256KB x 36
8MB	(1) 1M x 36	(1) 1M x 36	NONE	NONE
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
17MB	(1) 4M x 36	(1) 256KB x 36	NONE	NONE
19MB	(1) 4M x 36	(1) 256KB x 36	(1) 256KB x 36	(1) 256KB x 36
20MB	(1) 4M x 36	(1) 1M x 36	NONE	NONE
22MB	(1) 4M x 36	(1) 1M x 36	(1) 256KB x 36	(1) 256KB x 36
28MB	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
32MB	(1) 4M x 36	(1) 4M x 36	NONE	NONE
34MB	(1) 4M x 36	(1) 4M x 36	(1) 256KB x 36	(1) 256KB x 36
40MB	(1) 4M x 36	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36

CACHE CONFIGURATION
Size	Bank 0	Bank 1
64KB	(4) 8K x 8	(4) 8K x 8
256KB	(4) 32K x 8	(4) 32K x 8
Note: The location of the tag chip is unidentified.

CACHE JUMPER CONFIGURATION
Size	JF9	JF10
64KB	pins 1 & 2 closed	pins 1 & 2 closed
256KB	pins 2 & 3 closed	pins 2 & 3 closed

CACHE SELECT CONFIGURATION
Size	JS2	JS3	JS4	JS5
64KB	Open	Open	Open	Open
256KB	Closed	Closed	Closed	Closed

CPU PROCESSOR CONFIGURATION
CPU	JC1/JC2	JC3/JC4
SX	pins 2 & 3 closed	Open
DX/DX2	pins 1 & 2 closed	Closed

CPU TYPE CONFIGURATION
Speed	JF3	JF4
25MHz	pins 1 & 2 closed	pins 1 & 2 closed
33MHz	pins 2 & 3 closed	pins 1 & 2 closed

SCSI CONFIGURATION
Request/IRQ9	JR1	JR2
Installed	pins 1 & 2 closed	pins 1 & 2 closed
Not installed	pins 2 & 3 closed	pins 2 & 3 closed

PCI IRQ CONFIGURATION
IRQ setting	JI1
IRQ 5	pins 1 & 2 closed
IRQ 9	pins 3 & 4 closed
IRQ 11	pins 5 & 6 closed
IRQ 12	pins 7 & 8 closed