486DX/486SX CACHE MAINBOARD Motherboard Settings and Configuration

ATEN RESEARCH, INC.

486DX/486SX CACHE MAINBOARD

Processor
80486SX/80487SX/80486DX/80486DX2
Processor Speed
20/25/33/50(internal)/50/66(internal)MHz
Chip Set
UNI
Max. Onboard DRAM
128MB
Cache
32/64/128/256KB
BIOS
Award
Dimensions
330mm x 218mm
I/O Options
None
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
External battery
JP1
Turbo LED
JP16
Reset switch
JP14
Speaker
JP17
Turbo switch
JP15
Power LED & keylock
JP18

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
CMOS memory normal operation
JP2
pins 1 & 2 closed

CMOS memory clear
JP2
pins 2 & 3 closed
»
CPU speed (external) select 16/20/25/33/40MHz
JP3
pins 1 & 2 closed

CPU speed (external) select 50MHz
JP3
pins 2 & 3 closed
»
Monitor type select color
JP12
open

Monitor type select monochrome
JP12
closed

CPU TYPE CONFIGURATION
Jumper
JP7
JP9
JP13
80486DX2
pins 1 & 2 closed
pins 1 & 2 and 3 & 4 closed
pins 1 & 2 closed
80486DX
pins 1 & 2 closed
pins 1 & 2 and 3 & 4 closed
pins 1 & 2 closed
80487SX
pins 2 & 3 closed
pins 1 & 2 and 3 & 4 closed
pins 1 & 2 closed
80486SX
open
pins 2 & 3 closed
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
5MB
(4) 256K x 9
(4) 1M x 9
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 JUMPER CONFIGURATION
Jumper
32KB
64KB
128KB
256KB
JP22
pins 2 & 3 closed
pins 2 & 3 closed
pins 2 & 3 closed
pins 1 & 2 closed
JP23
pins 2 & 3 closed
pins 2 & 3 closed
pins 1 & 2 closed
pins 2 & 3 closed
JP25
pins 1 & 2 closed
pins 2 & 3 closed
pins 2 & 3 closed
pins 2 & 3 closed
JP26
pins 2 & 3 closed
pins 1 & 2 closed
pins 2 & 3 closed
pins 2 & 3 closed
JP27
closed
open
open
open
JP28
open
closed
open
open
JP29
open
open
closed
open
JP30
open
open
open
closed

SRAM CONFIGURATION
Size
Cache SRAM
Location
TAG
32KB
(4) 8K x 8
Bank 0
(1) 8K x 8
64KB
(8) 8K x 8
Banks 0 & 1
(1) 8K x 8
128KB
(4) 32K x 8
Bank 0
(1) 32K x 8
256KB
(8) 32K x 8
Banks 0 & 1
(1) 32K x 8

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486DX/486SX CACHE MAINBOARD Motherboard Settings and Configuration

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Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	20/25/33/50(internal)/50/66(internal)MHz
Chip Set	UNI
Max. Onboard DRAM	128MB
Cache	32/64/128/256KB
BIOS	Award
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	JP1	Turbo LED	JP16
Reset switch	JP14	Speaker	JP17
Turbo switch	JP15	Power LED & keylock	JP18

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	JP2	pins 1 & 2 closed
	CMOS memory clear	JP2	pins 2 & 3 closed
»	CPU speed (external) select 16/20/25/33/40MHz	JP3	pins 1 & 2 closed
	CPU speed (external) select 50MHz	JP3	pins 2 & 3 closed
»	Monitor type select color	JP12	open
	Monitor type select monochrome	JP12	closed

CPU TYPE CONFIGURATION
Jumper	JP7	JP9	JP13
80486DX2	pins 1 & 2 closed	pins 1 & 2 and 3 & 4 closed	pins 1 & 2 closed
80486DX	pins 1 & 2 closed	pins 1 & 2 and 3 & 4 closed	pins 1 & 2 closed
80487SX	pins 2 & 3 closed	pins 1 & 2 and 3 & 4 closed	pins 1 & 2 closed
80486SX	open	pins 2 & 3 closed	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
5MB	(4) 256K x 9	(4) 1M x 9
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 JUMPER CONFIGURATION
Jumper	32KB	64KB	128KB	256KB
JP22	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed	pins 1 & 2 closed
JP23	pins 2 & 3 closed	pins 2 & 3 closed	pins 1 & 2 closed	pins 2 & 3 closed
JP25	pins 1 & 2 closed	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed
JP26	pins 2 & 3 closed	pins 1 & 2 closed	pins 2 & 3 closed	pins 2 & 3 closed
JP27	closed	open	open	open
JP28	open	closed	open	open
JP29	open	open	closed	open
JP30	open	open	open	closed

SRAM CONFIGURATION
Size	Cache SRAM	Location	TAG
32KB	(4) 8K x 8	Bank 0	(1) 8K x 8
64KB	(8) 8K x 8	Banks 0 & 1	(1) 8K x 8
128KB	(4) 32K x 8	Bank 0	(1) 32K x 8
256KB	(8) 32K x 8	Banks 0 & 1	(1) 32K x 8