486E CACHE MAINBOARD Motherboard Settings and Configuration

AMERICAN DIGICOM CORPORATION

486E CACHE MAINBOARD

Processor
80486SX/80487SX/80486DX/80486DX2
Processor Speed
20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set
OPTI
Max. onboard DRAM
128MB
SRAM Cache
64/128/256/512KB
BIOS
AMI
Dimensions
330.2mm x 215.8mm
I/O Options
None
NPU Options
4167

CONNECTIONS
Purpose
Location
Purpose
Location
Speaker
J4
Turbo LED
JP17
Power LED & keylock
J5
Reset switch
S9
Turbo switch
JP16

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
I/O bus mode select EISA
JP0
Open

I/O bus mode select ISA
JP0
Closed
»
Monitor type select color
JP4
Closed

Monitor type select monochrome
JP4
Open
»
Factory configured - do not alter
JP6
Open

CPU TYPE CONFIGURATION
Jumper
80486SX
80487SX
80486DX/DX2
JP7
pins 2 & 3 closed
pins 1 & 2 and 3 & 4 closed
pins 1 & 2 and 3 & 4 closed
JP9
Open
pins 1 & 2 closed
pins 2 & 3 closed

CPU SPEED CONFIGURATION
Speed
iOSC
JP1
JP2
JP3
JP8
20MHz
40MHz
Open
Closed
pins 2 & 3
pins 2 & 3
25MHz
50MHz
Open
Open
pins 1 & 2
pins 2 & 3
33MHz
66MHz
Closed
Open
pins 1 & 2
pins 2 & 3
40MHz
80MHz
Open
Closed
pins 1 & 2
pins 2 & 3
50i MHz
50MHz
Open
Open
pins 1 & 2
pins 2 & 3
50MHz
50MHz
Closed
Closed
pins 1 & 2
pins 1 & 2
66i MHz
66MHz
Closed
Open
pins 1 & 2
pins 2 & 3

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

SRAM CONFIGURATION
Size
Bank 0
Bank 1
U49
U50
U51
U64
64KB
(4) 8K x 8
(4) 8K x 8
(1) 64K x 1
(1) 8K x 8
NONE
(1) 16K x 1
128KB
(4) 32K x 8
NONE
(1) 64K x 1
(1) 8K x 8
NONE
(1) 16K x 1
256KB
(4) 32K x 8
(4) 32K x 8
(1) 64K x 1
(1) 8K x 8
(1) 8K x 8
(1) 16K x 1
512KB
(4) 128K x 8
NONE
(1) 64K x 1
(1) 32K x 8
NONE
(1) 64K x 1

SRAM JUMPER CONFIGURATION
Jumper
64KB
128KB
256KB
512KB
JP5
pins 2 & 3 closed
pins 1 & 2 closed
pins 2 & 3 closed
pins 1 & 2 closed
JP10
Open
Open
Open
Closed
JP11
Open
Open
Closed
Closed
JP12
Open
Closed
Closed
Closed
JP13
Open
Open
Closed
Closed
JP14
Open
Closed
Closed
Closed
JP15
Open
Open
Open
Closed

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Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set	OPTI
Max. onboard DRAM	128MB
SRAM Cache	64/128/256/512KB
BIOS	AMI
Dimensions	330.2mm x 215.8mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
Speaker	J4	Turbo LED	JP17
Power LED & keylock	J5	Reset switch	S9
Turbo switch	JP16

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	I/O bus mode select EISA	JP0	Open
	I/O bus mode select ISA	JP0	Closed
»	Monitor type select color	JP4	Closed
	Monitor type select monochrome	JP4	Open
»	Factory configured - do not alter	JP6	Open

CPU TYPE CONFIGURATION
Jumper	80486SX	80487SX	80486DX/DX2
JP7	pins 2 & 3 closed	pins 1 & 2 and 3 & 4 closed	pins 1 & 2 and 3 & 4 closed
JP9	Open	pins 1 & 2 closed	pins 2 & 3 closed

CPU SPEED CONFIGURATION
Speed	iOSC	JP1	JP2	JP3	JP8
20MHz	40MHz	Open	Closed	pins 2 & 3	pins 2 & 3
25MHz	50MHz	Open	Open	pins 1 & 2	pins 2 & 3
33MHz	66MHz	Closed	Open	pins 1 & 2	pins 2 & 3
40MHz	80MHz	Open	Closed	pins 1 & 2	pins 2 & 3
50i MHz	50MHz	Open	Open	pins 1 & 2	pins 2 & 3
50MHz	50MHz	Closed	Closed	pins 1 & 2	pins 1 & 2
66i MHz	66MHz	Closed	Open	pins 1 & 2	pins 2 & 3

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

SRAM CONFIGURATION
Size	Bank 0	Bank 1	U49	U50	U51	U64
64KB	(4) 8K x 8	(4) 8K x 8	(1) 64K x 1	(1) 8K x 8	NONE	(1) 16K x 1
128KB	(4) 32K x 8	NONE	(1) 64K x 1	(1) 8K x 8	NONE	(1) 16K x 1
256KB	(4) 32K x 8	(4) 32K x 8	(1) 64K x 1	(1) 8K x 8	(1) 8K x 8	(1) 16K x 1
512KB	(4) 128K x 8	NONE	(1) 64K x 1	(1) 32K x 8	NONE	(1) 64K x 1

SRAM JUMPER CONFIGURATION
Jumper	64KB	128KB	256KB	512KB
JP5	pins 2 & 3 closed	pins 1 & 2 closed	pins 2 & 3 closed	pins 1 & 2 closed
JP10	Open	Open	Open	Closed
JP11	Open	Open	Closed	Closed
JP12	Open	Closed	Closed	Closed
JP13	Open	Open	Closed	Closed
JP14	Open	Closed	Closed	Closed
JP15	Open	Open	Open	Closed