80486 ASIC EISA SYSTEM BOARD Motherboard Settings and Configuration

MICRONICS COMPUTERS, INC.

80486 ASIC EISA SYSTEM BOARD

Processor
80486DX/80486DX2
Processor Speed
33/50(internal)MHz
Chip Set
Intel
Max. Onboard DRAM
64MB
Cache
64/256KB
BIOS
Phoenix
Dimensions
355mm x 304mm
I/O Options
32-bit local bus slot, floppy drive interface,
parallel port, serial ports (2)
NPU Options
4167

CONNECTIONS
Purpose
Location
Purpose
Location
External keyboard connector
J1
Speaker
J22
Parallel port
J4
Power LED & keylock
J23
Serial port 1
J5
32-bit Local bus slot
S1
Serial port 2
J15
Reset switch
W5
Floppy drive interface
J17
Turbo switch
W6
External battery
J17A
Turbo LED
W7

USER CONFIGURABLE SETTINGS
Function
Jumper/Switch
Position
»
Factory configured - do not alter
SW1/6
On
»
Factory configured - do not alter
SW1/7
Off
»
Monitor type select color
SW1/8
On

Monitor type select monochrome
SW1/8
Off
»
Factory configured - do not alter
W11
pins 2 & 3 closed
»
Factory configured - do not alter
W12
pins 1 & 2 closed
»
Floppy drive interface enabled
W13
pins 1 & 2 closed

Floppy drive interface disabled
W13
pins 2 & 3 closed
»
CPU select 486DX2/50MHz
W43
pins 1 & 2 closed

CPU select 486DX/33MHz
W43
Open
»
Factory configured - do not alter
W45
pins 1 & 2 closed

PARALLEL PORT CONFIGURATION
I/O Address
Port
W3
W4
W10
3BC-3BEh
LPT1
pins 1 & 2 closed
pins 2 & 3 closed
pins 2 & 3 closed
378-37Ah
LPT2
pins 1 & 2 closed
pins 1 & 2 closed
pins 2 & 3 closed
278-27Ah
LPT3
pins 2 & 3 closed
pins 1 & 2 closed
pins 2 & 3 closed
N/A
Disabled
pins 2 & 3 closed
pins 2 & 3 closed
pins 2 & 3 closed

SERIAL PORT CONFIGURATION
Port 1
Port 2
W2
W8
W9
COM1
COM2
pins 1 & 2 closed
pins 1 & 2 closed
pins 1 & 2 closed
COM1
Disabled
pins 1 & 2 closed
pins 1 & 2 closed
pins 2 & 3 closed
Disabled
COM2
pins 2 & 3 closed
pins 1 & 2 closed
pins 1 & 2 closed
Disabled
Disabled
pins 2 & 3 closed
pins 1 & 2 closed
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
3MB
(4)256K x 9
(4)256K x 9
(4)256K x 9
NONE
4MB
(4)256K x 9
(4)256K x 9
(4)256K x 9
(4)256K x 9
4MB
(4)1M x 9
NONE
NONE
NONE
5MB
(4)256K x 9
(4)1M x 9
NONE
NONE
6MB
(4)256K x 9
(4)256K x 9
(4)1M x 9
NONE
7MB
(4)256K x 9
(4)256K x 9
(4)256K x 9
(4)1M x 9
8MB
(4)1M x 9
(4)1M x 9
NONE
NONE
9MB
(4)256K x 9
(4)1M x 9
(4)1M x 9
(4)1M x 9
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
13MB
(4)256K x 9
(4)1M x 9
(4)1M x 9
(4)1M x 9
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
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
28MB
(4)1M x 9
(4)1M x 9
(4)1M x 9
(4)4M x 9
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
52MB
(4)1M x 9
(4)4M x 9
(4)4M x 9
(4)4M x 9
64MB
(4)4M x 9
(4)4M x 9
(4)4M x 9
(4)4M x 9

DRAM SWITCH CONFIGURATION
Size
SW1/switch 1
SW1/switch 2
SW1/switch 3
SW1/switch 4
SW1/switch 5
1MB
On
On
On
On
On
2MB
Off
On
On
On
On
3MB
On
Off
On
On
On
4MB
Off
Off
On
On
On
4MB
On
On
Off
On
On
5MB
On
On
Off
Off
On
6MB
On
Off
On
Off
On
7MB
Off
On
On
Off
On
8MB
Off
On
Off
On
On
9MB
On
Off
Off
Off
On
10MB
Off
Off
On
Off
On
12MB
On
Off
Off
On
On
13MB
Off
Off
Off
Off
On
16MB
On
On
Off
On
On
16MB
Off
Off
Off
On
Off

DRAM SWITCH CONFIGURATION (CONT.)
Size
SW1/switch 1
SW1/switch 2
SW1/switch 3
SW1/switch 4
SW1/switch 5
20MB
On
On
Off
Off
Off
24MB
On
Off
On
Off
Off
28MB
Off
On
On
Off
Off
32MB
Off
On
Off
On
Off
36MB
On
Off
Off
Off
Off
40MB
Off
Off
On
Off
Off
48MB
On
Off
Off
On
Off
52MB
Off
Off
Off
Off
Off
64MB
Off
Off
Off
On
Off

CACHE CONFIGURATION
Size
Bank 0
Bank 1
TAG
64KB
(4) 8K x 8
(4) 8K x 8
(1) 32K x 8
256KB
(4) 32K x 8
(4) 32K x 8
(1) 32K x 8
Note:The exact location of TAG is unknown.

CACHE JUMPER CONFIGURATION
Size
W20
W21
W41
W44
64KB
Open
Open
Open
Pins 2 & 3 closed
256KB
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed

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80486 ASIC EISA SYSTEM BOARD Motherboard Settings and Configuration

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Processor	80486DX/80486DX2
Processor Speed	33/50(internal)MHz
Chip Set	Intel
Max. Onboard DRAM	64MB
Cache	64/256KB
BIOS	Phoenix
Dimensions	355mm x 304mm
I/O Options	32-bit local bus slot, floppy drive interface, parallel port, serial ports (2)
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
External keyboard connector	J1	Speaker	J22
Parallel port	J4	Power LED & keylock	J23
Serial port 1	J5	32-bit Local bus slot	S1
Serial port 2	J15	Reset switch	W5
Floppy drive interface	J17	Turbo switch	W6
External battery	J17A	Turbo LED	W7

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	Factory configured - do not alter	SW1/6	On
»	Factory configured - do not alter	SW1/7	Off
»	Monitor type select color	SW1/8	On
	Monitor type select monochrome	SW1/8	Off
»	Factory configured - do not alter	W11	pins 2 & 3 closed
»	Factory configured - do not alter	W12	pins 1 & 2 closed
»	Floppy drive interface enabled	W13	pins 1 & 2 closed
	Floppy drive interface disabled	W13	pins 2 & 3 closed
»	CPU select 486DX2/50MHz	W43	pins 1 & 2 closed
	CPU select 486DX/33MHz	W43	Open
»	Factory configured - do not alter	W45	pins 1 & 2 closed

PARALLEL PORT CONFIGURATION
I/O Address	Port	W3	W4	W10
3BC-3BEh	LPT1	pins 1 & 2 closed	pins 2 & 3 closed	pins 2 & 3 closed
378-37Ah	LPT2	pins 1 & 2 closed	pins 1 & 2 closed	pins 2 & 3 closed
278-27Ah	LPT3	pins 2 & 3 closed	pins 1 & 2 closed	pins 2 & 3 closed
N/A	Disabled	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed

SERIAL PORT CONFIGURATION
Port 1	Port 2	W2	W8	W9
COM1	COM2	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
COM1	Disabled	pins 1 & 2 closed	pins 1 & 2 closed	pins 2 & 3 closed
Disabled	COM2	pins 2 & 3 closed	pins 1 & 2 closed	pins 1 & 2 closed
Disabled	Disabled	pins 2 & 3 closed	pins 1 & 2 closed	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
3MB	(4)256K x 9	(4)256K x 9	(4)256K x 9	NONE
4MB	(4)256K x 9	(4)256K x 9	(4)256K x 9	(4)256K x 9
4MB	(4)1M x 9	NONE	NONE	NONE
5MB	(4)256K x 9	(4)1M x 9	NONE	NONE
6MB	(4)256K x 9	(4)256K x 9	(4)1M x 9	NONE
7MB	(4)256K x 9	(4)256K x 9	(4)256K x 9	(4)1M x 9
8MB	(4)1M x 9	(4)1M x 9	NONE	NONE
9MB	(4)256K x 9	(4)1M x 9	(4)1M x 9	(4)1M x 9
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
13MB	(4)256K x 9	(4)1M x 9	(4)1M x 9	(4)1M x 9
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
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
28MB	(4)1M x 9	(4)1M x 9	(4)1M x 9	(4)4M x 9
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
52MB	(4)1M x 9	(4)4M x 9	(4)4M x 9	(4)4M x 9
64MB	(4)4M x 9	(4)4M x 9	(4)4M x 9	(4)4M x 9

DRAM SWITCH CONFIGURATION
Size	SW1/switch 1	SW1/switch 2	SW1/switch 3	SW1/switch 4	SW1/switch 5
1MB	On	On	On	On	On
2MB	Off	On	On	On	On
3MB	On	Off	On	On	On
4MB	Off	Off	On	On	On
4MB	On	On	Off	On	On
5MB	On	On	Off	Off	On
6MB	On	Off	On	Off	On
7MB	Off	On	On	Off	On
8MB	Off	On	Off	On	On
9MB	On	Off	Off	Off	On
10MB	Off	Off	On	Off	On
12MB	On	Off	Off	On	On
13MB	Off	Off	Off	Off	On
16MB	On	On	Off	On	On
16MB	Off	Off	Off	On	Off

DRAM SWITCH CONFIGURATION (CONT.)
Size	SW1/switch 1	SW1/switch 2	SW1/switch 3	SW1/switch 4	SW1/switch 5
20MB	On	On	Off	Off	Off
24MB	On	Off	On	Off	Off
28MB	Off	On	On	Off	Off
32MB	Off	On	Off	On	Off
36MB	On	Off	Off	Off	Off
40MB	Off	Off	On	Off	Off
48MB	On	Off	Off	On	Off
52MB	Off	Off	Off	Off	Off
64MB	Off	Off	Off	On	Off

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
64KB	(4) 8K x 8	(4) 8K x 8	(1) 32K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8
Note:The exact location of TAG is unknown.

CACHE JUMPER CONFIGURATION
Size	W20	W21	W41	W44
64KB	Open	Open	Open	Pins 2 & 3 closed
256KB	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed