ZIF SOCKET SYSTEM BOARD Motherboard Settings and Configuration

MICRONICS COMPUTERS, INC.

ZIF SOCKET SYSTEM BOARD

Processor
80486SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed
25/33/50(internal)66/(internal)MHz
Chip Set
Intel
Max. Onboard DRAM
64MB
Cache
64/128/256KB
BIOS
AMI
Dimensions
330mm x 218mm
I/O Options
32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port,
serial ports (2)
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
Floppy drive interface
CN1
Speaker
J33
IDE interface
CN2
Power LED & keylock
J34
External battery
J8
IDE interface LED
W11
External keyboard connector
J10
Reset switch
W12
Serial port 1
J12
Turbo LED
W13
Parallel port
J15
Turbo switch
W14
Serial port 2
J16
32-bit VESA Local bus slots
SL1 & SL2

USER CONFIGURABLE SETTINGS
Function
Jumper/Switch
Position
»
Factory configured - do not alter
SW1/2
On
»
Factory configured - do not alter
SW1/3
Off
»
Factory configured - do not alter
SW1/4
Off
»
Clock type select Motorola 126818
W1
Open

Clock type select Dallas
W1
Closed
»
Parallel port unidirectional (printer)
W5
pins 1 & 2 closed

Parallel port bidirectional
W5
pins 2 & 3 closed
»
Monitor type select color
W6
Closed

Monitor type select monochrome
W6
Open
»
Factory configured - do not alter
W7
Open
»
CMOS memory normal operation
W8
pins 2 & 3 closed

CMOS memory clear
W8
pins 1 & 2 closed
»
Factory configured - do not alter
W20
Closed
»
Factory configured - do not alter
W28
Closed
»
Battery normal operation (Dallas)
W31
Open

Battery memory clear (Dallas)
W31
Closed
»
Local bus parity enabled
W40
Closed

Local bus disabled
W40
Open
»
Factory configured - do not alter
W61
Open
»
Factory configured - do not alter
W62
Open
»
CPU type select 80486DX/DX2/Pentium Overdrive
W70
pins 2 & 3 closed

CPU type select 80486SX
W70
pins 1 & 2 closed
»
CPU type select PQFP installed with PGA Pentium Overdrive
W71
pins 1 & 2 closed

CPU type select PQFP installed with PGA 80486DX/DX2
W71
pins 2 & 3 closed
Note: The location of jumpers W20, W28, W61 & W62 are unidentified.

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
1MB
(1) 256K x 36
NONE
NONE
NONE
2MB
(1) 256K x 36
(1) 256K x 36
NONE
NONE
3MB
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
NONE
4MB
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
4MB
(1) 1M x 36
NONE
NONE
NONE
5MB
(1) 256K x 36
(1) 1M x 36
NONE
NONE
6MB
(1) 256K x 36
(1) 256K x 36
(1) 1M x 36
NONE
7MB
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
(1) 1M x 36
8MB
(1) 1M x 36
(1) 1M x 36
NONE
NONE
9MB
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
NONE
10MB
(1) 256K x 36
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
12MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
NONE
13MB
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
16MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
16MB
(1) 4M x 36
NONE
NONE
NONE
20MB
(1) 1M x 36
(1) 4M x 36
NONE
NONE

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
24MB
(1) 1M x 36
(1) 1M x 36
(1) 4M x 36
NONE
28MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1) 4M x 36
32MB
(1) 4M x 36
(1) 4M x 36
NONE
NONE
36MB
(1) 1M x 36
(1) 4M x 36
(1) 4M x 36
NONE
40MB
(1) 1M x 36
(1) 1M x 36
(1) 4M x 36
(1) 4M x 36
48MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
NONE
52MB
(1) 1M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
64MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36

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 JUMPER CONFIGURATION
Size
W64
W65
W66
W67
W68
64KB
1 & 2
1 & 2
2 & 3
2 & 3
1 & 2
128KB
2 & 3
1 & 2
1 & 2
1 & 2
2 & 3
256KB
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION
Speed
SW1/1
25MHz
On
33MHz
Off
50iMHz
On
66iMHz
Off

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ZIF SOCKET SYSTEM BOARD Motherboard Settings and Configuration

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Processor	80486SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed	25/33/50(internal)66/(internal)MHz
Chip Set	Intel
Max. Onboard DRAM	64MB
Cache	64/128/256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, serial ports (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Floppy drive interface	CN1	Speaker	J33
IDE interface	CN2	Power LED & keylock	J34
External battery	J8	IDE interface LED	W11
External keyboard connector	J10	Reset switch	W12
Serial port 1	J12	Turbo LED	W13
Parallel port	J15	Turbo switch	W14
Serial port 2	J16	32-bit VESA Local bus slots	SL1 & SL2

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	Factory configured - do not alter	SW1/2	On
»	Factory configured - do not alter	SW1/3	Off
»	Factory configured - do not alter	SW1/4	Off
»	Clock type select Motorola 126818	W1	Open
	Clock type select Dallas	W1	Closed
»	Parallel port unidirectional (printer)	W5	pins 1 & 2 closed
	Parallel port bidirectional	W5	pins 2 & 3 closed
»	Monitor type select color	W6	Closed
	Monitor type select monochrome	W6	Open
»	Factory configured - do not alter	W7	Open
»	CMOS memory normal operation	W8	pins 2 & 3 closed
	CMOS memory clear	W8	pins 1 & 2 closed
»	Factory configured - do not alter	W20	Closed
»	Factory configured - do not alter	W28	Closed
»	Battery normal operation (Dallas)	W31	Open
	Battery memory clear (Dallas)	W31	Closed
»	Local bus parity enabled	W40	Closed
	Local bus disabled	W40	Open
»	Factory configured - do not alter	W61	Open
»	Factory configured - do not alter	W62	Open
»	CPU type select 80486DX/DX2/Pentium Overdrive	W70	pins 2 & 3 closed
	CPU type select 80486SX	W70	pins 1 & 2 closed
»	CPU type select PQFP installed with PGA Pentium Overdrive	W71	pins 1 & 2 closed
	CPU type select PQFP installed with PGA 80486DX/DX2	W71	pins 2 & 3 closed
Note: The location of jumpers W20, W28, W61 & W62 are unidentified.

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(1) 256K x 36	NONE	NONE	NONE
2MB	(1) 256K x 36	(1) 256K x 36	NONE	NONE
3MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	NONE
4MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
4MB	(1) 1M x 36	NONE	NONE	NONE
5MB	(1) 256K x 36	(1) 1M x 36	NONE	NONE
6MB	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36	NONE
7MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36
8MB	(1) 1M x 36	(1) 1M x 36	NONE	NONE
9MB	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36	NONE
10MB	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	NONE
13MB	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 4M x 36	NONE	NONE	NONE
20MB	(1) 1M x 36	(1) 4M x 36	NONE	NONE

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
24MB	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36	NONE
28MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36
32MB	(1) 4M x 36	(1) 4M x 36	NONE	NONE
36MB	(1) 1M x 36	(1) 4M x 36	(1) 4M x 36	NONE
40MB	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36	(1) 4M x 36
48MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	NONE
52MB	(1) 1M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36

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 JUMPER CONFIGURATION
Size	W64	W65	W66	W67	W68
64KB	1 & 2	1 & 2	2 & 3	2 & 3	1 & 2
128KB	2 & 3	1 & 2	1 & 2	1 & 2	2 & 3
256KB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION
Speed	SW1/1
25MHz	On
33MHz	Off
50iMHz	On
66iMHz	Off