486-S Motherboard Settings and Configuration

MICROMEDIA TECHNOLOGIES, INC.

486-S

Processor
80486SX/80486DX/80486DX2
Processor Speed
20/25/33/50(internal)MHz
Chip Set
SIS
Max. Onboard DRAM
32MB
Cache
32/64/128/256KB
BIOS
AMI
Dimensions
230mm x 218mm
I/O Options
None
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
Power LED & keylock
CN1
Turbo LED
CN4
Speaker
CN2
Reset switch
CN5
Turbo switch
CN3
External battery
CN6

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
CMOS memory normal operation
JP10
pins 1 & 2 closed

CMOS memory clear
JP10
pins 2 & 3 closed
»
Monitor type select color
JP13
Closed

Monitor type select monochrome
JP13
Open
»
Power good signal detect from board
JP17
pins 1 & 2 closed

Power good signal detect from power supply
JP17
pins 2 & 3 closed

DRAM CONFIGURATION
Size
Bank 0
Bank 1
1MB
(4) 256K x 9
NONE
2MB
(4) 256K x 9
(4) 256K x 9
4MB
(4) 1M x 9
NONE
8MB
(4) 1M x 9
(4) 1M x 9
16MB
(4) 4M x 9
NONE
20MB
(4) 1M x 9
(4) 4M x 9
32MB
(4) 4M x 9
(4) 4M x 9
CACHE CONFIGURATION
Size
Bank 0
Bank 1
TAG
32KB
(4) 8K x 8
NONE
(1) 8K x 8
64KB
(4) 8K x 8
(4) 8K x 8
(1) 8K x 8
128KB
(4) 32K x 8
NONE
(1) 32K x 8
256KB
(4) 32K x 8
(4) 32K x 8
(1) 32K x 8
CACHE JUMPER CONFIGURATION
Size
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
32KB
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
64KB
1 & 2
1 & 2
2 & 3
2 & 3
1 & 2
1 & 2
1 & 2
2 & 3
2 & 3
128KB
2 & 3
1 & 2
2 & 3
2 & 3
2 & 3
1 & 2
2 & 3
1 & 2
1 & 2
256KB
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
Note:Pins designated should be in the closed position.
CPU TYPE CONFIGURATION
Type
JP14
JP15
JP16
80486SX
Open
pins 2 & 3 closed
pins 2 & 3 closed
80487SX
Closed
pins 1 & 2 closed
pins 2 & 3 closed
80486DX
Closed
pins 1 & 2 closed
pins 1 & 2 closed

486-S Motherboard Settings and Configuration

Search

My Books

Discover

Processor	80486SX/80486DX/80486DX2
Processor Speed	20/25/33/50(internal)MHz
Chip Set	SIS
Max. Onboard DRAM	32MB
Cache	32/64/128/256KB
BIOS	AMI
Dimensions	230mm x 218mm
I/O Options	None
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	CN1	Turbo LED	CN4
Speaker	CN2	Reset switch	CN5
Turbo switch	CN3	External battery	CN6

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	JP10	pins 1 & 2 closed
	CMOS memory clear	JP10	pins 2 & 3 closed
»	Monitor type select color	JP13	Closed
	Monitor type select monochrome	JP13	Open
»	Power good signal detect from board	JP17	pins 1 & 2 closed
	Power good signal detect from power supply	JP17	pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(4) 256K x 9	NONE
2MB	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	NONE
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
20MB	(4) 1M x 9	(4) 4M x 9
32MB	(4) 4M x 9	(4) 4M x 9

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

CACHE JUMPER CONFIGURATION
Size	JP1	JP2	JP3	JP4	JP5	JP6	JP7	JP8	JP9
32KB	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2
64KB	1 & 2	1 & 2	2 & 3	2 & 3	1 & 2	1 & 2	1 & 2	2 & 3	2 & 3
128KB	2 & 3	1 & 2	2 & 3	2 & 3	2 & 3	1 & 2	2 & 3	1 & 2	1 & 2
256KB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	JP14	JP15	JP16
80486SX	Open	pins 2 & 3 closed	pins 2 & 3 closed
80487SX	Closed	pins 1 & 2 closed	pins 2 & 3 closed
80486DX	Closed	pins 1 & 2 closed	pins 1 & 2 closed