486 EISA BABY SIZE Motherboard Settings and Configuration

INFOMATIC POWER SYSTEMS CORPORATION

486 EISA BABY SIZE

Processor
80486SX/80487SX/80486DX/80486DX2
Processor Speed
20/25/33/50/66(internal)MHz
Chip Set
OPTI
Max. Onboard DRAM
128MB
Cache
64/128/256/512KB
BIOS
AMI
Dimensions
330mm x 218mm
I/O Options
None
NPU Options
4167

CONNECTIONS
Purpose
Location
Purpose
Location
Speaker
J4
Turbo LED
J7
Power LED & keylock
J5
Reset switch
S9
Turbo switch
J6

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
External BCLK buffering 80486DX (33/50MHz)
JP1
pins 1 & 2 closed

External BCLK buffering 80486SX/80487SX (20/25MHz)
JP1
pins 2 & 3 closed
»
Cache bank select single (128/512KB)
JP2
pins 1 & 2 closed

Cache bank select double (64/256KB)
JP2
pins 2 & 3 closed
»
Snooping/Flush 20MHz CPU
JP8
Closed

Snooping/Flush > 20MHz CPU
JP8
Open
»
Monitor type select color
JP9
Closed

Monitor type select monochrome
JP9
Open
»
CPU clock mode select single frequency
JP12
pins 1 & 2 closed

CPU clock mode select double frequency
JP12
pins 2 & 3 closed

DRAM CONFIGURATION
Size
Bank 0
Bank 1
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
64MB
(4) 16M x 9
NONE
128MB
(4) 16M x 9
(4) 16M x 9

CACHE CONFIGURATION
Size
Bank 0
Bank 1
64KB
(4) 8K x 8
(4) 8K x 8
128KB
NONE
(4) 32K x 8
256KB
(4) 32K x 8
(4) 32K x 8
512KB
NONE
(4) 128K x 8
Note:In order to configure cache to 512KB, board needs to be specifically ordered. The difference will be that Bank 1 will be made up of 4 32-pin DIP sockets, instead of 4 28-pin DIP sockets.

CACHE TAG CHIP CONFIGURATION
Size
JP3
JP4
JP5
U55
U56
64KB
Open
Open
Open
(1) 8K x 8
N/A
128KB
Closed
Open
Open
(1) 8K x 8
N/A
256KB
Closed
Closed
Open
(1) 8K x 8
(1) 8K x 8
512KB
Closed
Closed
Closed
(1) 32K x 8
N/A

CACHE DIRTY BIT CHIP CONFIGURATION
Size
JP16
JP17
JP18
U72 & U54
64KB
Open
Open
Open
(2) 16K x 1 or (2) 64K x 1
128KB
Closed
Open
Open
(2) 16K x 1 or (2) 64K x 1
256KB
Closed
Closed
Open
(2) 16K x 1 or (2) 64K x 1
512KB
Closed
Closed
Closed
(2) 64K x 1

CPU TYPE CONFIGURATION
Type
JP10
JP11
80486SX
pins 1 & 2 & 3 & 4 closed
pins 2 & 3 closed
80487SX
pins 1 & 2 & 3 & 4 closed
pins 1 & 2 closed
80486DX
pins 2 & 3 closed
Open

EBC SPEED CONFIGURATION
Speed
JP6
JP7
20MHz
Open
Open
25MHz
Open
Open
33MHz
Open
Closed
40MHz
Closed
Open
50MHz
Closed
Closed

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486 EISA BABY SIZE Motherboard Settings and Configuration

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Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	20/25/33/50/66(internal)MHz
Chip Set	OPTI
Max. Onboard DRAM	128MB
Cache	64/128/256/512KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
Speaker	J4	Turbo LED	J7
Power LED & keylock	J5	Reset switch	S9
Turbo switch	J6

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	External BCLK buffering 80486DX (33/50MHz)	JP1	pins 1 & 2 closed
	External BCLK buffering 80486SX/80487SX (20/25MHz)	JP1	pins 2 & 3 closed
»	Cache bank select single (128/512KB)	JP2	pins 1 & 2 closed
	Cache bank select double (64/256KB)	JP2	pins 2 & 3 closed
»	Snooping/Flush 20MHz CPU	JP8	Closed
	Snooping/Flush > 20MHz CPU	JP8	Open
»	Monitor type select color	JP9	Closed
	Monitor type select monochrome	JP9	Open
»	CPU clock mode select single frequency	JP12	pins 1 & 2 closed
	CPU clock mode select double frequency	JP12	pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
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
64MB	(4) 16M x 9	NONE
128MB	(4) 16M x 9	(4) 16M x 9

CACHE CONFIGURATION
Size	Bank 0	Bank 1
64KB	(4) 8K x 8	(4) 8K x 8
128KB	NONE	(4) 32K x 8
256KB	(4) 32K x 8	(4) 32K x 8
512KB	NONE	(4) 128K x 8
Note:In order to configure cache to 512KB, board needs to be specifically ordered. The difference will be that Bank 1 will be made up of 4 32-pin DIP sockets, instead of 4 28-pin DIP sockets.

CACHE TAG CHIP CONFIGURATION
Size	JP3	JP4	JP5	U55	U56
64KB	Open	Open	Open	(1) 8K x 8	N/A
128KB	Closed	Open	Open	(1) 8K x 8	N/A
256KB	Closed	Closed	Open	(1) 8K x 8	(1) 8K x 8
512KB	Closed	Closed	Closed	(1) 32K x 8	N/A

CACHE DIRTY BIT CHIP CONFIGURATION
Size	JP16	JP17	JP18	U72 & U54
64KB	Open	Open	Open	(2) 16K x 1 or (2) 64K x 1
128KB	Closed	Open	Open	(2) 16K x 1 or (2) 64K x 1
256KB	Closed	Closed	Open	(2) 16K x 1 or (2) 64K x 1
512KB	Closed	Closed	Closed	(2) 64K x 1

CPU TYPE CONFIGURATION
Type	JP10	JP11
80486SX	pins 1 & 2 & 3 & 4 closed	pins 2 & 3 closed
80487SX	pins 1 & 2 & 3 & 4 closed	pins 1 & 2 closed
80486DX	pins 2 & 3 closed	Open

EBC SPEED CONFIGURATION
Speed	JP6	JP7
20MHz	Open	Open
25MHz	Open	Open
33MHz	Open	Closed
40MHz	Closed	Open
50MHz	Closed	Closed