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SYSTEM MICRO 386

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