MBA-486AI-33, 50 Motherboard Settings and Configuration

DYNA MICRO, INC.

MBA-486AI-33, 50

Processor
80486SX/80487SX/80486DX
Processor Speed
16/20/25/33/50MHz
Chip Set
SIS
Max. Onboard DRAM
32MB
Cache
64/128/256KB
BIOS
AMI/Award
Dimensions
330mm x 218mm
I/O Options
32-bit external memory card slot
NPU Options
4167

CONNECTIONS
Purpose
Location
Purpose
Location
External battery
BAT
Reset switch
RST
32-bit external memory card
CN1
Speaker
SPK
Power LED & keylock
KEY
Turbo switch
TSW
Turbo LED
LED

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
Power good signal detect from power supply
JP1
pins 1 & 2 closed

Power good signal detect from board
JP1
pins 2 & 3 closed

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
1MB
(4) 256K x 9
NONE
NONE
NONE
2MB
(4) 256K x 9
(4) 256K x 9
NONE
NONE
4MB
(4) 1M x 9
NONE
NONE
NONE
6MB
(4) 256K x 9
(4) 256K x 9
(4) 1M x 9
NONE
8MB
(4) 1M x 9
(4) 1M x 9
NONE
NONE
10MB
(4) 256K x 9
(4) 256K x 9
(4) 1M x 9
(4) 1M x 9
12MB
(4) 1M x 9
(4) 1M x 9
(4) 1M x 9
NONE
16MB
(4) 1M x 9
(4) 1M x 9
(4) 1M x 9
(4) 1M x 9
16MB
(4) 4M x 9
NONE
NONE
NONE
18MB
(4) 256K x 9
(4) 256K x 9
(4) 4M x 9
NONE
20MB
(4) 1M x 9
(4) 4M x 9
NONE
NONE
24MB
(4) 1M x 9
(4) 1M x 9
(4) 4M x 9
NONE
32MB
(4) 4M x 9
(4) 4M x 9
NONE
NONE
36MB
(4) 1M x 9
(4) 4M x 9
(4) 4M x 9
NONE
40MB
(4) 1M x 9
(4) 1M x 9
(4) 4M x 9
(4) 4M x 9
48MB
(4) 4M x 9
(4) 4M x 9
(4) 4M x 9
NONE
64MB
(4) 4M x 9
(4) 4M x 9
(4) 4M x 9
(4) 4M x 9
Note:Banks 2 and 3 are used when a 32-bit external memory card is installed at CN1.

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

CACHE RESISTOR CONFIGURATION
Size
R1
R2
R3
64KB
Installed
Not installed
Not installed
128KB
Not installed
Installed
Not installed
256KB
Not installed
Not installed
Installed

CPU TYPE CONFIGURATION
Type
SW1/1
SW1/2
SW1/3
SW1/4
SW1/5
SW1/6
80486SX
Off
Off
Off
Off
On
On
80487SX
Off
On
On
On
Off
On
80486DX
On
On
On
On
On
On

CPU SPEED CONFIGURATION
Speed
JP2
JP3
16MHz
pins 1 & 2 closed
pins 1 & 2 closed
20MHz
pins 1 & 2 closed
pins 1 & 2 closed
25MHz
pins 2 & 3 closed
pins 1 & 2 closed
33MHz
pins 2 & 3 closed
pins 1 & 2 closed
50MHz
pins 2 & 3 closed
pins 2 & 3 closed

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Processor	80486SX/80487SX/80486DX
Processor Speed	16/20/25/33/50MHz
Chip Set	SIS
Max. Onboard DRAM	32MB
Cache	64/128/256KB
BIOS	AMI/Award
Dimensions	330mm x 218mm
I/O Options	32-bit external memory card slot
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	BAT	Reset switch	RST
32-bit external memory card	CN1	Speaker	SPK
Power LED & keylock	KEY	Turbo switch	TSW
Turbo LED	LED

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Power good signal detect from power supply	JP1	pins 1 & 2 closed
	Power good signal detect from board	JP1	pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(4) 256K x 9	NONE	NONE	NONE
2MB	(4) 256K x 9	(4) 256K x 9	NONE	NONE
4MB	(4) 1M x 9	NONE	NONE	NONE
6MB	(4) 256K x 9	(4) 256K x 9	(4) 1M x 9	NONE
8MB	(4) 1M x 9	(4) 1M x 9	NONE	NONE
10MB	(4) 256K x 9	(4) 256K x 9	(4) 1M x 9	(4) 1M x 9
12MB	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9	NONE
16MB	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE	NONE	NONE
18MB	(4) 256K x 9	(4) 256K x 9	(4) 4M x 9	NONE
20MB	(4) 1M x 9	(4) 4M x 9	NONE	NONE
24MB	(4) 1M x 9	(4) 1M x 9	(4) 4M x 9	NONE
32MB	(4) 4M x 9	(4) 4M x 9	NONE	NONE
36MB	(4) 1M x 9	(4) 4M x 9	(4) 4M x 9	NONE
40MB	(4) 1M x 9	(4) 1M x 9	(4) 4M x 9	(4) 4M x 9
48MB	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9	NONE
64MB	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9
Note:Banks 2 and 3 are used when a 32-bit external memory card is installed at CN1.

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

CACHE RESISTOR CONFIGURATION
Size	R1	R2	R3
64KB	Installed	Not installed	Not installed
128KB	Not installed	Installed	Not installed
256KB	Not installed	Not installed	Installed

CPU TYPE CONFIGURATION
Type	SW1/1	SW1/2	SW1/3	SW1/4	SW1/5	SW1/6
80486SX	Off	Off	Off	Off	On	On
80487SX	Off	On	On	On	Off	On
80486DX	On	On	On	On	On	On

CPU SPEED CONFIGURATION
Speed	JP2	JP3
16MHz	pins 1 & 2 closed	pins 1 & 2 closed
20MHz	pins 1 & 2 closed	pins 1 & 2 closed
25MHz	pins 2 & 3 closed	pins 1 & 2 closed
33MHz	pins 2 & 3 closed	pins 1 & 2 closed
50MHz	pins 2 & 3 closed	pins 2 & 3 closed