SIS 486-471 VL BUS 5/3.3V Motherboard Settings and Configuration

UNIDENTIFIED

SIS 486-471 VL BUS 5/3.3V

Processor
CX486S/80486SX/CX486DX/80486DX/80486DX2/80486DX4/Pentium Overdrive
Processor Speed
20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set
SIS
Max. Onboard DRAM
128MB
Cache
64/128/256/512KB
BIOS
AMI
Dimensions
254mm x 220mm
I/O Options
32-bit VESA local bus slots (3), green PC connector
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
External battery
J1
Reset switch
J6
Green PC connector
J2
Power LED & keylock
J7
Turbo switch
J3
Break switch connector
JP26
Turbo LED
J4
32-bit VESA local bus slots
SL1 - SL3
Speaker
J5

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
Turbo switch enabled
J3
pins 1 & 2 closed

Turbo switch disabled
J3
pins 2 & 3 closed

Use for break switch
J3
pins 4 & 5 closed
»
CMOS memory normal operation
JP16
pins 1 & 2 closed

CMOS memory clear
JP16
pins 2 & 3 closed
»
Monitor type select VGA/EGA/monochrome
JP17
Open

Monitor type select CGA
JP17
Closed
»
CX486S2 CPU not installed
JP18
Open

CX486S2 CPU installed
JP18
Closed
»
RC pin for break switch
JP19
pins 1 & 2 closed

RC pin for RC
JP19
pins 2 & 3 closed
»
Factory configured - do not alter
JP20
pins 2 & 3 closed
»
Factory configured - do not alter
JP23
pins 1 & 2 closed
»
J3 set with pins open
JP27
Closed

J3 set with pins 4 & 5 closed
JP27
Open
»
Factory configured - do not alter
JP43
pins 1 & 2 closed

DRAM CONFIGURATION (TABLE 1)
Size
Bank 0
Bank 1
Bank 2
1MB
(4) 256K x 9
NONE
NONE
2MB
(4) 256K x 9
(1) 256K x 36
NONE
4MB
(4) 1M x 9
NONE
NONE
5MB
(4) 256K x 9
(1) 1M x 36
NONE
6MB
(4) 256K x 9
(1) 256K x 36
(1) 1M x 36
8MB
(4) 1M x 9
(1) 1M x 36
NONE
12MB
(4) 1M x 9
(1) 1M x 36
(1) 1M x 36
16MB
(4) 4M x 9
NONE
NONE
17MB
(4) 256K x 9
(1) 4M x 36
NONE
18MB
(4) 256K x 9
(1) 256K x 36
(1) 4M x 36
20MB
(4) 1M x 9
(1) 4M x 36
NONE
24MB
(4) 1M x 9
(1) 1M x 36
(1) 4M x 36
32MB
(4) 4M x 9
(1) 4M x 36
NONE
34MB
(4) 256K x 9
(1) 256K x 36
(1) 8M x 36
36MB
(4) 1M x 9
(1) 4M x 36
(1) 4M x 36
48MB
(4) 4M x 9
(1) 8M x 36
NONE
48MB
(4) 4M x 9
(1) 8M x 36
NONE
52MB
(4) 1M x 9
(1) 4M x 36
(1) 8M x 36
64MB
(4) 4M x 9
(1) 4M x 36
(1) 8M x 36
64MB
(4) 16M x 9
NONE
NONE
68MB
(4) 1M x 9
(1) 8M x 36
(1) 8M x 36
80MB
(4) 4M x 9
(1) 8M x 36
(1) 8M x 36
96MB
(4) 16M x 9
(1) 8M x 36
NONE
128MB
(4) 16M x 9
(1) 8M x 36
(1) 8M x 36

DRAM CONFIGURATION (TABLE 2)
Size
Bank 0
Bank 1
Bank 2
1MB
(1) 256K x 36
NONE
NONE
2MB
(1) 256K x 36
(1) 256K x 36
NONE
4MB
(1) 1M x 36
NONE
NONE
5MB
(1) 256K x 36
(1) 1M x 36
NONE
6MB
(1) 256K x 36
(1) 256K x 36
(4) 1M x 9
8MB
(1) 2M x 36
NONE
NONE
12MB
(1) 1M x 36
(1) 1M x 36
(4) 1M x 9
16MB
(1) 2M x 36
(1) 2M x 36
NONE
16MB
(1) 4M x 36
NONE
NONE
17MB
(1) 256K x 36
(1) 4M x 36
NONE
18MB
(1) 256K x 36
(1) 256K x 36
(4) 4M x 9
20MB
(1) 1M x 36
(1) 4M x 36
NONE
24MB
(1) 1M x 36
(1) 1M x 36
(4) 4M x 9
32MB
(1) 4M x 36
(1) 4M x 36
NONE
32MB
(1) 8M x 36
NONE
NONE
36MB
(1) 1M x 36
(1) 4M x 36
(4) 4M x 9
36MB
(1) 1M x 36
(1) 8M x 36
NONE
48MB
(1) 4M x 36
(1) 4M x 36
(4) 4M x 9
48MB
(1) 4M x 36
(1) 8M x 36
NONE
64MB
(1) 8M x 36
(1) 8M x 36
NONE
72MB
(1) 1M x 36
(1) 1M x 36
(4) 16M x 9
96MB
(1) 4M x 36
(1) 4M x 36
(4) 16M x 9
128MB
(1) 8M x 36
(1) 8M x 36
(4) 16M x 9

DRAM JUMPER CONFIGURATION
Configuration
JP36
JP37
Table 1
pins 1 & 2 closed
pins 2 & 3 closed
Table 2
pins 2 & 3 closed
pins 1 & 2 closed

CACHE CONFIGURATION
Size
Bank 0
Bank 1
TAG
64KB
(4) 8K x 8
(4) 8K x 8
(1) 4K x 8
128KB
(4) 32K x 8
NONE
(1) 8K x 8
256KB
(4) 32K x 8
(4) 32K x 8
(1) 16K x 8
256KB
(4) 32K x 8
(4) 32K x 8
(1) 32K x 8
512KB
(4) 128K x 8
NONE
(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size
JP1
JP2
JP3
JP4
JP33
JP34
JP35
64KB
2 & 3
1 & 2
2 & 3, 4 & 5
1 & 2
1 & 2
1 & 2
Open
128KB
1 & 2
1 & 2
1 & 2, 3 & 4
1 & 2
2 & 3
2 & 3
Open
256KB
2 & 3
Open
2 & 3, 4 & 5
Open
2 & 3
2 & 3
Closed
256KB
2 & 3
2 & 3
2 & 3, 4 & 5
1 & 2
2 & 3
2 & 3
Open
512KB
1 & 2
2 & 3
1 & 2, 3 & 4
2 & 3
2 & 3
2 & 3
Open
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type
JP30
JP31
P24D
Closed
Closed
All other CPU
Open
Open

CPU TYPE CONFIGURATION
Type
JP8
JP9
JP10
JP11
JP12
CX486SX
2 & 3
Closed
2 & 3
Open
2 & 3, 4 & 5
80486SX
2 & 3
Open
2 & 3
Open
Open
SLE486SX
2 & 3
Open
2 & 3
Open
3 & 4
CX486DX
1 & 2
Closed
2 & 3
3 & 4
2 & 3
SLE486DX
1 & 2
Closed
2 & 3
3 & 4
3 & 4
80486DX
1 & 2
Closed
2 & 3
3 & 4
Open
SLE486DX2
1 & 2
Closed
2 & 3
3 & 4
3 & 4
80486DX4
1 & 2
Closed
2 & 3
3 & 4
3 & 4
P24D
1 & 2
Closed
1 & 2
3 & 4
1 & 2, 3 & 4
P24T
1 & 2
Closed
1 & 2
2 & 3
3 & 4
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type
JP13
JP14
JP15
JP21
JP22
CX486SX
Open
1 & 2, 3 & 4
2 & 3
1 & 2
2 & 3
80486SX
Open
Open
Open
2 & 3
1 & 2
SLE486SX
1 & 2
2 & 3
4 & 5
2 & 3
1 & 2
CX486DX
Open
1 & 2, 3 & 4
2 & 3
1 & 2
2 & 3
SLE486DX
1 & 2
2 & 3
4 & 5
2 & 3
1 & 2
80486DX
Open
Open
Open
2 & 3
1 & 2
SLE486DX2
1 & 2
2 & 3
4 & 5
2 & 3
1 & 2
80486DX4
1 & 2
2 & 3
4 & 5
2 & 3
1 & 2
P24D
2 & 3
2 & 3
4 & 5
2 & 3
1 & 2
P24T
Open
2 & 3
1 & 2
1 & 2
1 & 2
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type
JP24
JP25
JP32
JP41
JP42
CX486SX
2 & 3
2 & 3
2 & 3
2 & 3, 5 & 6
Closed
80486SX
Open
Open
1 & 2
2 & 3, 5 & 6
Closed
SLE486SX
Open
Open
2 & 3
2 & 3, 5 & 6
Closed
CX486DX
2 & 3
2 & 3
2 & 3
2 & 3, 5 & 6
Closed
SLE486DX
Open
Open
2 & 3
2 & 3, 5 & 6
Closed
80486DX
Open
Open
1 & 2
2 & 3, 5 & 6
Closed
SLE486DX2
Open
Open
2 & 3
2 & 3, 5 & 6
Closed
80486DX4
Open
Open
2 & 3
1 & 2, 4 & 5
Open
P24D
Open
1 & 2
2 & 3
2 & 3, 5 & 6
Closed
P24T
1 & 2
1 & 2
2 & 3
2 & 3, 5 & 6
Closed
Note: Pins designated should be in the closed position.

CPU VOLTAGE CONFIGURATION
Voltage
JP41
3.3v
pins 1 & 2, 4 & 5 closed
5.0v (DX4)
pins 2 & 3, 5 & 6 closed
Note: If Q4, Q5, and Q6 are installed or Q6 only installed, set JP41 with pins 1 & 2, 4 & 5 closed.

CPU SPEED CONFIGURATION (U16-AVASEM/AV9107-03/KTS0147C)
Speed
JP5
JP6
JP7
20MHz
Closed
Open
Closed
25MHz
Closed
Closed
Open
33MHz
Open
Closed
Closed
40MHz
Closed
Open
Open
50iMHz
Closed
Closed
Open
50MHz
Open
Open
Closed
66iMHz
Open
Closed
Closed

CPU SPEED CONFIGURATION (U17-MX8315)
Speed
JP5
JP6
JP7
20MHz
Open
Open
Open
25MHz
Open
Closed
Open
33MHz
Closed
Closed
Closed
40MHz
Open
Closed
Closed
50iMHz
Open
Closed
Open
50MHz
Closed
Open
Open
66iMHz
Closed
Closed
Closed

VESA WAIT STATE CONFIGURATION
Wait states
JP28
0 wait states
pins 1 & 2 closed
1 wait state
pins 2 & 3 closed

BUS SPEED CONFIGURATION
CPU speed
JP29
<= 33MHz
pins 1 & 2 closed
> 33MHz
pins 2 & 3 closed

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SIS 486-471 VL BUS 5/3.3V Motherboard Settings and Configuration

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Processor	CX486S/80486SX/CX486DX/80486DX/80486DX2/80486DX4/Pentium Overdrive
Processor Speed	20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set	SIS
Max. Onboard DRAM	128MB
Cache	64/128/256/512KB
BIOS	AMI
Dimensions	254mm x 220mm
I/O Options	32-bit VESA local bus slots (3), green PC connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Reset switch	J6
Green PC connector	J2	Power LED & keylock	J7
Turbo switch	J3	Break switch connector	JP26
Turbo LED	J4	32-bit VESA local bus slots	SL1 - SL3
Speaker	J5

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Turbo switch enabled	J3	pins 1 & 2 closed
	Turbo switch disabled	J3	pins 2 & 3 closed
	Use for break switch	J3	pins 4 & 5 closed
»	CMOS memory normal operation	JP16	pins 1 & 2 closed
	CMOS memory clear	JP16	pins 2 & 3 closed
»	Monitor type select VGA/EGA/monochrome	JP17	Open
	Monitor type select CGA	JP17	Closed
»	CX486S2 CPU not installed	JP18	Open
	CX486S2 CPU installed	JP18	Closed
»	RC pin for break switch	JP19	pins 1 & 2 closed
	RC pin for RC	JP19	pins 2 & 3 closed
»	Factory configured - do not alter	JP20	pins 2 & 3 closed
»	Factory configured - do not alter	JP23	pins 1 & 2 closed
»	J3 set with pins open	JP27	Closed
	J3 set with pins 4 & 5 closed	JP27	Open
»	Factory configured - do not alter	JP43	pins 1 & 2 closed

DRAM CONFIGURATION (TABLE 1)
Size	Bank 0	Bank 1	Bank 2
1MB	(4) 256K x 9	NONE	NONE
2MB	(4) 256K x 9	(1) 256K x 36	NONE
4MB	(4) 1M x 9	NONE	NONE
5MB	(4) 256K x 9	(1) 1M x 36	NONE
6MB	(4) 256K x 9	(1) 256K x 36	(1) 1M x 36
8MB	(4) 1M x 9	(1) 1M x 36	NONE
12MB	(4) 1M x 9	(1) 1M x 36	(1) 1M x 36
16MB	(4) 4M x 9	NONE	NONE
17MB	(4) 256K x 9	(1) 4M x 36	NONE
18MB	(4) 256K x 9	(1) 256K x 36	(1) 4M x 36
20MB	(4) 1M x 9	(1) 4M x 36	NONE
24MB	(4) 1M x 9	(1) 1M x 36	(1) 4M x 36
32MB	(4) 4M x 9	(1) 4M x 36	NONE
34MB	(4) 256K x 9	(1) 256K x 36	(1) 8M x 36
36MB	(4) 1M x 9	(1) 4M x 36	(1) 4M x 36
48MB	(4) 4M x 9	(1) 8M x 36	NONE
48MB	(4) 4M x 9	(1) 8M x 36	NONE
52MB	(4) 1M x 9	(1) 4M x 36	(1) 8M x 36
64MB	(4) 4M x 9	(1) 4M x 36	(1) 8M x 36
64MB	(4) 16M x 9	NONE	NONE
68MB	(4) 1M x 9	(1) 8M x 36	(1) 8M x 36
80MB	(4) 4M x 9	(1) 8M x 36	(1) 8M x 36
96MB	(4) 16M x 9	(1) 8M x 36	NONE
128MB	(4) 16M x 9	(1) 8M x 36	(1) 8M x 36

DRAM CONFIGURATION (TABLE 2)
Size	Bank 0	Bank 1	Bank 2
1MB	(1) 256K x 36	NONE	NONE
2MB	(1) 256K x 36	(1) 256K x 36	NONE
4MB	(1) 1M x 36	NONE	NONE
5MB	(1) 256K x 36	(1) 1M x 36	NONE
6MB	(1) 256K x 36	(1) 256K x 36	(4) 1M x 9
8MB	(1) 2M x 36	NONE	NONE
12MB	(1) 1M x 36	(1) 1M x 36	(4) 1M x 9
16MB	(1) 2M x 36	(1) 2M x 36	NONE
16MB	(1) 4M x 36	NONE	NONE
17MB	(1) 256K x 36	(1) 4M x 36	NONE
18MB	(1) 256K x 36	(1) 256K x 36	(4) 4M x 9
20MB	(1) 1M x 36	(1) 4M x 36	NONE
24MB	(1) 1M x 36	(1) 1M x 36	(4) 4M x 9
32MB	(1) 4M x 36	(1) 4M x 36	NONE
32MB	(1) 8M x 36	NONE	NONE
36MB	(1) 1M x 36	(1) 4M x 36	(4) 4M x 9
36MB	(1) 1M x 36	(1) 8M x 36	NONE
48MB	(1) 4M x 36	(1) 4M x 36	(4) 4M x 9
48MB	(1) 4M x 36	(1) 8M x 36	NONE
64MB	(1) 8M x 36	(1) 8M x 36	NONE
72MB	(1) 1M x 36	(1) 1M x 36	(4) 16M x 9
96MB	(1) 4M x 36	(1) 4M x 36	(4) 16M x 9
128MB	(1) 8M x 36	(1) 8M x 36	(4) 16M x 9

DRAM JUMPER CONFIGURATION
Configuration	JP36	JP37
Table 1	pins 1 & 2 closed	pins 2 & 3 closed
Table 2	pins 2 & 3 closed	pins 1 & 2 closed

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
64KB	(4) 8K x 8	(4) 8K x 8	(1) 4K x 8
128KB	(4) 32K x 8	NONE	(1) 8K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 16K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8
512KB	(4) 128K x 8	NONE	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JP1	JP2	JP3	JP4	JP33	JP34	JP35
64KB	2 & 3	1 & 2	2 & 3, 4 & 5	1 & 2	1 & 2	1 & 2	Open
128KB	1 & 2	1 & 2	1 & 2, 3 & 4	1 & 2	2 & 3	2 & 3	Open
256KB	2 & 3	Open	2 & 3, 4 & 5	Open	2 & 3	2 & 3	Closed
256KB	2 & 3	2 & 3	2 & 3, 4 & 5	1 & 2	2 & 3	2 & 3	Open
512KB	1 & 2	2 & 3	1 & 2, 3 & 4	2 & 3	2 & 3	2 & 3	Open
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	JP30	JP31
P24D	Closed	Closed
All other CPU	Open	Open

CPU TYPE CONFIGURATION
Type	JP8	JP9	JP10	JP11	JP12
CX486SX	2 & 3	Closed	2 & 3	Open	2 & 3, 4 & 5
80486SX	2 & 3	Open	2 & 3	Open	Open
SLE486SX	2 & 3	Open	2 & 3	Open	3 & 4
CX486DX	1 & 2	Closed	2 & 3	3 & 4	2 & 3
SLE486DX	1 & 2	Closed	2 & 3	3 & 4	3 & 4
80486DX	1 & 2	Closed	2 & 3	3 & 4	Open
SLE486DX2	1 & 2	Closed	2 & 3	3 & 4	3 & 4
80486DX4	1 & 2	Closed	2 & 3	3 & 4	3 & 4
P24D	1 & 2	Closed	1 & 2	3 & 4	1 & 2, 3 & 4
P24T	1 & 2	Closed	1 & 2	2 & 3	3 & 4
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type	JP13	JP14	JP15	JP21	JP22
CX486SX	Open	1 & 2, 3 & 4	2 & 3	1 & 2	2 & 3
80486SX	Open	Open	Open	2 & 3	1 & 2
SLE486SX	1 & 2	2 & 3	4 & 5	2 & 3	1 & 2
CX486DX	Open	1 & 2, 3 & 4	2 & 3	1 & 2	2 & 3
SLE486DX	1 & 2	2 & 3	4 & 5	2 & 3	1 & 2
80486DX	Open	Open	Open	2 & 3	1 & 2
SLE486DX2	1 & 2	2 & 3	4 & 5	2 & 3	1 & 2
80486DX4	1 & 2	2 & 3	4 & 5	2 & 3	1 & 2
P24D	2 & 3	2 & 3	4 & 5	2 & 3	1 & 2
P24T	Open	2 & 3	1 & 2	1 & 2	1 & 2
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type	JP24	JP25	JP32	JP41	JP42
CX486SX	2 & 3	2 & 3	2 & 3	2 & 3, 5 & 6	Closed
80486SX	Open	Open	1 & 2	2 & 3, 5 & 6	Closed
SLE486SX	Open	Open	2 & 3	2 & 3, 5 & 6	Closed
CX486DX	2 & 3	2 & 3	2 & 3	2 & 3, 5 & 6	Closed
SLE486DX	Open	Open	2 & 3	2 & 3, 5 & 6	Closed
80486DX	Open	Open	1 & 2	2 & 3, 5 & 6	Closed
SLE486DX2	Open	Open	2 & 3	2 & 3, 5 & 6	Closed
80486DX4	Open	Open	2 & 3	1 & 2, 4 & 5	Open
P24D	Open	1 & 2	2 & 3	2 & 3, 5 & 6	Closed
P24T	1 & 2	1 & 2	2 & 3	2 & 3, 5 & 6	Closed
Note: Pins designated should be in the closed position.

CPU VOLTAGE CONFIGURATION
Voltage	JP41
3.3v	pins 1 & 2, 4 & 5 closed
5.0v (DX4)	pins 2 & 3, 5 & 6 closed
Note: If Q4, Q5, and Q6 are installed or Q6 only installed, set JP41 with pins 1 & 2, 4 & 5 closed.

CPU SPEED CONFIGURATION (U16-AVASEM/AV9107-03/KTS0147C)
Speed	JP5	JP6	JP7
20MHz	Closed	Open	Closed
25MHz	Closed	Closed	Open
33MHz	Open	Closed	Closed
40MHz	Closed	Open	Open
50iMHz	Closed	Closed	Open
50MHz	Open	Open	Closed
66iMHz	Open	Closed	Closed

VESA WAIT STATE CONFIGURATION
Wait states	JP28
0 wait states	pins 1 & 2 closed
1 wait state	pins 2 & 3 closed

BUS SPEED CONFIGURATION
CPU speed	JP29
<= 33MHz	pins 1 & 2 closed
> 33MHz	pins 2 & 3 closed