SYSTEM MICRO 386 Motherboard Settings and Configuration

MINI MICRO SUPPLY COMPANY

SYSTEM MICRO 386

Processor
80386DX
Processor Speed
16/20MHz
Chip Set
C & T
Max. Onboard DRAM
2MB
Cache
None
BIOS
Phoenix
Dimensions
355mm x 304mm
I/O Options
32-bit external memory card, parallel ports (2), serial ports (2), video connector
NPU Options
80287/80387DX

CONNECTIONS
Purpose
Location
Purpose
Location
VGA connector
J1
Parallel port (LPT2)
J9
Power LED & keylock
J2
Serial port (COM1)
J10
Speaker
J3
Serial port (COM2)
J11
Parallel port (LPT1)
J6
Light pen connector
J12
Reset switch
J7
32-bit external memory card
S1
External battery
J8

USER CONFIGURABLE SETTINGS
Function
Jumper/Switch
Position
»
Onboard EGA enabled
SW2/switch 1
On
»
Onboard EGA disabled
SW2/switch 1
Off
»
Monitor type select color
SW2/switch 4
On

Monitor type select monochrome
SW2/switch 4
Off
»
NPU select 80287 or none
SW2/switch 5
On

NPU select 80387
SW2/switch 5
Off
»
Factory configured - do not alter
SW1/switch 6
Off
»
Gate SRED On video connector
W1
pins 1 & 2 closed

Gate ground On video connector pin
W1
pins 2 & 3 closed
»
BIOS type select 27128
W2
pins 1 & 2 closed

BIOS type select 27256
W2
pins 2 & 3 closed

DRAM CONFIGURATION
Onboard DRAM
Bank 0
Bank 1
Exernal memory
SW2/2
SW2/3
1MB
(36) 41256
NONE
NONE
On
On
2MB
(36) 41256
(4) 256K x 9
NONE
On
On
2MB
(36) 41256
(4) 256K x 9
2MB
Off
On
2MB
(36) 41256
(4) 256K x 9
8MB
On
Off
1MB
(36) 41256
NONE
16MB
Off
Off
Note: When external memory is installed, system memory is disabled.

SERIAL PORT CONFIGURATION
COM1 (J10)
COM2 (J11)
Interrupt
SW1/1
SW1/2
SW1/5
SW1/6
SW1/7
SW1/8
enabled
enabled
N/A
On
On
On
On
On
On
enabled
disabled
IRQ4
On
Off
Off
Off
Off
On
enabled
disabled
IRQ3
On
Off
Off
Off
On
Off
disabled
enabled
IRQ4
Off
On
On
Off
Off
Off
disabled
enabled
IRQ3
Off
On
Off
On
Off
Off
disabled
disabled
N/A
Off
Off
Off
Off
Off
Off

PARALLEL PORT CONFIGURATION
LPT2
LPT3
SW1/Switch 3
SW1/Switch 4
Enabled
Enabled
On
On
Enabled
Disabled
Off
On
Disabled
Enabled
On
Off
Disabled
Disabled
Off
Off
Note:If there is no monochrome adapter then LPT2 will be recognized as LPT1 and LPT3 as LPT2.

DISPLAY TYPE CONFIGURATION
Display Type
Primary Adapter
Mode
SW3/1
SW3/2
SW3/3
SW3/4
Color/monochrome adapter
EGA
80 x 25
Off
Off
Off
On
Color/monochrome adapter
EGA
40 x 25
On
Off
Off
On
EGA/monochrome adapter
EGA
CGA
On
On
On
Off
EGA/monochrome adapter
EGA
EGA
Off
On
On
Off
Multi-sync/mono adapter
EGA
EGA
On
On
Off
Off
Color/monochrome adapter
Monochrome
80 x 25
Off
Off
On
On
Color/monochrome adapter
Monochrome
40 x 25
On
Off
Off
On
Color/monochrome adapter
Monochrome
CGA
On
On
On
Off
EGA/monochrome adapter
Monochrome
EGA
Off
On
On
Off
Multi-sync/mono adapter
Monochrome
EGA
On
On
Off
Off
EGA/Color adapter
EGA
80 x 25
Off
Off
On
On
EGA/Color adapter
EGA
40 x 25
Off
On
Off
On
EGA/Color adapter
Color
80 x 25
Off
Off
Off
On
EGA/Color adapter
Color
40 x 25
On
On
On
Off

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SYSTEM MICRO 386 Motherboard Settings and Configuration

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Processor	80386DX
Processor Speed	16/20MHz
Chip Set	C & T
Max. Onboard DRAM	2MB
Cache	None
BIOS	Phoenix
Dimensions	355mm x 304mm
I/O Options	32-bit external memory card, parallel ports (2), serial ports (2), video connector
NPU Options	80287/80387DX

CONNECTIONS
Purpose	Location	Purpose	Location
VGA connector	J1	Parallel port (LPT2)	J9
Power LED & keylock	J2	Serial port (COM1)	J10
Speaker	J3	Serial port (COM2)	J11
Parallel port (LPT1)	J6	Light pen connector	J12
Reset switch	J7	32-bit external memory card	S1
External battery	J8

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	Onboard EGA enabled	SW2/switch 1	On
»	Onboard EGA disabled	SW2/switch 1	Off
»	Monitor type select color	SW2/switch 4	On
	Monitor type select monochrome	SW2/switch 4	Off
»	NPU select 80287 or none	SW2/switch 5	On
	NPU select 80387	SW2/switch 5	Off
»	Factory configured - do not alter	SW1/switch 6	Off
»	Gate SRED On video connector	W1	pins 1 & 2 closed
	Gate ground On video connector pin	W1	pins 2 & 3 closed
»	BIOS type select 27128	W2	pins 1 & 2 closed
	BIOS type select 27256	W2	pins 2 & 3 closed

DRAM CONFIGURATION
Onboard DRAM	Bank 0	Bank 1	Exernal memory	SW2/2	SW2/3
1MB	(36) 41256	NONE	NONE	On	On
2MB	(36) 41256	(4) 256K x 9	NONE	On	On
2MB	(36) 41256	(4) 256K x 9	2MB	Off	On
2MB	(36) 41256	(4) 256K x 9	8MB	On	Off
1MB	(36) 41256	NONE	16MB	Off	Off
Note: When external memory is installed, system memory is disabled.

SERIAL PORT CONFIGURATION
COM1 (J10)	COM2 (J11)	Interrupt	SW1/1	SW1/2	SW1/5	SW1/6	SW1/7	SW1/8
enabled	enabled	N/A	On	On	On	On	On	On
enabled	disabled	IRQ4	On	Off	Off	Off	Off	On
enabled	disabled	IRQ3	On	Off	Off	Off	On	Off
disabled	enabled	IRQ4	Off	On	On	Off	Off	Off
disabled	enabled	IRQ3	Off	On	Off	On	Off	Off
disabled	disabled	N/A	Off	Off	Off	Off	Off	Off

PARALLEL PORT CONFIGURATION
LPT2	LPT3	SW1/Switch 3	SW1/Switch 4
Enabled	Enabled	On	On
Enabled	Disabled	Off	On
Disabled	Enabled	On	Off
Disabled	Disabled	Off	Off
Note:If there is no monochrome adapter then LPT2 will be recognized as LPT1 and LPT3 as LPT2.

DISPLAY TYPE CONFIGURATION
Display Type	Primary Adapter	Mode	SW3/1	SW3/2	SW3/3	SW3/4
Color/monochrome adapter	EGA	80 x 25	Off	Off	Off	On
Color/monochrome adapter	EGA	40 x 25	On	Off	Off	On
EGA/monochrome adapter	EGA	CGA	On	On	On	Off
EGA/monochrome adapter	EGA	EGA	Off	On	On	Off
Multi-sync/mono adapter	EGA	EGA	On	On	Off	Off
Color/monochrome adapter	Monochrome	80 x 25	Off	Off	On	On
Color/monochrome adapter	Monochrome	40 x 25	On	Off	Off	On
Color/monochrome adapter	Monochrome	CGA	On	On	On	Off
EGA/monochrome adapter	Monochrome	EGA	Off	On	On	Off
Multi-sync/mono adapter	Monochrome	EGA	On	On	Off	Off
EGA/Color adapter	EGA	80 x 25	Off	Off	On	On
EGA/Color adapter	EGA	40 x 25	Off	On	Off	On
EGA/Color adapter	Color	80 x 25	Off	Off	Off	On
EGA/Color adapter	Color	40 x 25	On	On	On	Off