LITTLE BOARD/386SX Motherboard Settings and Configuration

AMPRO COMPUTERS, INC.

LITTLE BOARD/386SX

Processor
80386SX
Processor Speed
25MHz
Chip Set
Ampro
Max. onboard DRAM
16MB
Cache
None
BIOS
Award
Dimensions
330mm x 218mm
I/O Options
Floppy drive interface, IDE interface, parallel port, SCSI connector, serial ports (2)
NPU Options
80387SX

CONNECTIONS
Purpose
Location
Purpose
Location
Power connector
J1
SCSI interface
J7
Serial port (COM2)
J2
Floppy drive interface
J8
Serial port (COM1)
J3
IDE interface
J11
Keyboard
J5
Power J1-1 to +12V BUS
W7
Parallel port
J6

USER CONFIGURABLE SETTINGS
Function
Jumper/Switch
Position
»
SCSI controller enabled
W1
Closed

SCSI controller disabled
W1
Open
»
SCSI controller select IRQ3
W2 & W3
Closed

SCSI controller select none
W2 & W3
Open
»
Factory configured - do not alter
W4
Open
»
Factory configured - do not alter
W5
Open
»
SCSI termination power enabled
W6
Closed

SCSI termination power none
W6
Open
»
Floppy clock select 16MHz
W10
Closed

Floppy clock select none
W10
Open
»
Flash EPROM programming power +12V to Byte-wide
W16
Open

Flash EPROm programming power disabled
W16
Closed
»
Watchdog timer output selection
W17
Open

Watchdog timer output none
W17
Closed
»
Factory configured - do not alter
W18
Open
»
Floppy PCVAL selection
W19
Open

Floppy PCVAL none
W19
Closed
»
Factory configured - do not alter
W21
N/A
»
Factory configured - do not alter
W22
N/A
»
Power fail NMI enabled
W23
Open

Power fail NMI none
W23
Closed
»
Parallel port interrrupt option select via setup
W24
Open

Parallel port interrrupt option none
W24
Closed

DRAM CONFIGURATION
Size
Bank 0
Bank 1
512KB
(2) 256K x 9
NONE
1MB
(2) 256K x 9
(2) 256K x 9
2MB
(2) 1M x 9
(2) 256K x 9
4MB
(2) 1M x 9
(2) 1M x 9
8MB
(2) 4M x 9
NONE
10MB
(2) 1M x 9
(2) 4M x 9
16MB
(2) 4M x 9
(2) 4M x 9

EPROM CONFIGURATION (S0)
EPROM
W8
W9
W25
27C256
Open
pins 7 & 8, 10 & 11
pins 1 & 2
27C512
Open
pins 1 & 4, 7 & 8, 10 & 11
pins 1 & 2
27C010
Open
pins 1 & 4, 2 & 5, 6 & 9, 7 & 8
pins 1 & 2
27C020
Open
pins 1 & 4, 2 & 5, 6 & 9, 7 & 8, 11 & 12
pins 1 & 2
27C040
Open
pins 1 & 4, 2 & 3, 6 & 9, 7 & 8, 11 & 12
pins 1 & 2
27C080
Closed
pins 1 & 4, 2 & 3, 7 & 8, 11 & 12
pins 1 & 2
62256
Open
pins 4 & 7, 5 & 8, 10 & 11
pins 1 & 2 or 2 & 3
628128
Open
pins 1 & 2, 4 & 7, 5 & 8, 10 & 11
pins 1 & 2 or 2 & 3
uPD434000
Open
pins 1 & 2, 3 & 6, 4 & 7, 5 & 8, 11 & 12
pins 1 & 2 or 2 & 3
28F256
Open
pins 2 & 5, 6 & 9, 7 & 8
pins 1 & 2
28F512
Open
pins 1 & 4, 2 & 5, 6 & 9, 7 & 8
pins 1 & 2
28F010
Open
pins 1 & 4, 2 & 5, 6 & 9, 7 & 8
pins 1 & 2
28F020
Open
pins 1 & 4, 2 & 5, 6 & 9, 7 & 8, 11 & 12
pins 1 & 2
Note:Pins designated should be in the closed position.

EPROM/FLASH EPROM CONFIGURATION (S1 & S2)
EPROM
W12
W13
W14
W15
128KB
pins 2 & 3 closed
pins 2 & 3 closed
pins 2 & 3 closed
pins 2 & 3 closed
256KB
pins 2 & 3 closed
pins 2 & 3 closed
pins 2 & 3 closed
pins 2 & 3 closed

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LITTLE BOARD/386SX Motherboard Settings and Configuration

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Processor	80386SX
Processor Speed	25MHz
Chip Set	Ampro
Max. onboard DRAM	16MB
Cache	None
BIOS	Award
Dimensions	330mm x 218mm
I/O Options	Floppy drive interface, IDE interface, parallel port, SCSI connector, serial ports (2)
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
Power connector	J1	SCSI interface	J7
Serial port (COM2)	J2	Floppy drive interface	J8
Serial port (COM1)	J3	IDE interface	J11
Keyboard	J5	Power J1-1 to +12V BUS	W7
Parallel port	J6

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	SCSI controller enabled	W1	Closed
	SCSI controller disabled	W1	Open
»	SCSI controller select IRQ3	W2 & W3	Closed
	SCSI controller select none	W2 & W3	Open
»	Factory configured - do not alter	W4	Open
»	Factory configured - do not alter	W5	Open
»	SCSI termination power enabled	W6	Closed
	SCSI termination power none	W6	Open
»	Floppy clock select 16MHz	W10	Closed
	Floppy clock select none	W10	Open
»	Flash EPROM programming power +12V to Byte-wide	W16	Open
	Flash EPROm programming power disabled	W16	Closed
»	Watchdog timer output selection	W17	Open
	Watchdog timer output none	W17	Closed
»	Factory configured - do not alter	W18	Open
»	Floppy PCVAL selection	W19	Open
	Floppy PCVAL none	W19	Closed
»	Factory configured - do not alter	W21	N/A
»	Factory configured - do not alter	W22	N/A
»	Power fail NMI enabled	W23	Open
	Power fail NMI none	W23	Closed
»	Parallel port interrrupt option select via setup	W24	Open
	Parallel port interrrupt option none	W24	Closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
512KB	(2) 256K x 9	NONE
1MB	(2) 256K x 9	(2) 256K x 9
2MB	(2) 1M x 9	(2) 256K x 9
4MB	(2) 1M x 9	(2) 1M x 9
8MB	(2) 4M x 9	NONE
10MB	(2) 1M x 9	(2) 4M x 9
16MB	(2) 4M x 9	(2) 4M x 9

EPROM CONFIGURATION (S0)
EPROM	W8	W9	W25
27C256	Open	pins 7 & 8, 10 & 11	pins 1 & 2
27C512	Open	pins 1 & 4, 7 & 8, 10 & 11	pins 1 & 2
27C010	Open	pins 1 & 4, 2 & 5, 6 & 9, 7 & 8	pins 1 & 2
27C020	Open	pins 1 & 4, 2 & 5, 6 & 9, 7 & 8, 11 & 12	pins 1 & 2
27C040	Open	pins 1 & 4, 2 & 3, 6 & 9, 7 & 8, 11 & 12	pins 1 & 2
27C080	Closed	pins 1 & 4, 2 & 3, 7 & 8, 11 & 12	pins 1 & 2
62256	Open	pins 4 & 7, 5 & 8, 10 & 11	pins 1 & 2 or 2 & 3
628128	Open	pins 1 & 2, 4 & 7, 5 & 8, 10 & 11	pins 1 & 2 or 2 & 3
uPD434000	Open	pins 1 & 2, 3 & 6, 4 & 7, 5 & 8, 11 & 12	pins 1 & 2 or 2 & 3
28F256	Open	pins 2 & 5, 6 & 9, 7 & 8	pins 1 & 2
28F512	Open	pins 1 & 4, 2 & 5, 6 & 9, 7 & 8	pins 1 & 2
28F010	Open	pins 1 & 4, 2 & 5, 6 & 9, 7 & 8	pins 1 & 2
28F020	Open	pins 1 & 4, 2 & 5, 6 & 9, 7 & 8, 11 & 12	pins 1 & 2
Note:Pins designated should be in the closed position.

EPROM/FLASH EPROM CONFIGURATION (S1 & S2)
EPROM	W12	W13	W14	W15
128KB	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed
256KB	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed