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MICROFRAME 386S6

MONOLITHIC SYSTEMS, INC. (COLORADO MSI)

MICROFRAME 386S6

Processor

80386SX (exact location unidentified)

Processor Speed

16/20MHz

Chip Set

C & T

Video Chip Set

None

Maximum Onboard Memory

8MB

Maximum Video Memory

None

Cache

None

BIOS

AMI

Dimensions

330mm x 215mm

I/O Options

Floppy drive interface, IDE interface, parallel port, PS/2 mouse interface, serial ports (2)

NPU Options

80387SX (exact location unidentified)

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Ready LED

J16

IDE interface LED

J3

Serial port 1

J18

Front panel connector

J6

Serial port 2

J20

PS/2 mouse interface

J8

Speaker

J22

Auxiliary keyboard connector

J9

Reset switch

J23

IDE interface

J10

IDE access LED

J24

Floppy drive interface

J11

Power LED & keylock

J40

Parallel port

J15

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

CMOS memory normal operation

J2

Open

 

CMOS memory clear

J2

Closed

Factory configured - do not alter (oscillators enabled)

J7

Open

 

Factory configured - do not alter (oscillators disabled)

J7

Closed

 

PS/2 mouse CLK enabled

J12

Pins 2 & 3 closed

 

PS/2 mouse CLK disabled

J12

Pins 1 & 2 closed

 

PS/2 mouse data enabled

J13

Pins 1 & 2 closed

 

PS/2 mouse data disabled

J13

Pins 2 & 3 closed

 

PS/2 mouse IRQ12 enabled

J17

Closed

 

PS/2 mouse IRQ12 disabled

J17

Open

Pipeline mode enabled

J19

Closed

 

Pipeline mode disabled

J19

Open

Monitor type select EGA/VGA

J21

Pins 2 & 3 closed

 

Monitor type select monochrome

J21

Pins 1 & 2 closed

Factory configured - do not alter

J25

Unidentified

Factory configured - do not alter (80387SX ready signal)

J27

Closed

Factory configured - do not alter

J53

Unidentified

IDE interface enabled

S1/1

On

 

IDE interface disabled

S1/1

Off

IDE IOCHRDY signal from pin 21 (Seagate/CDC/Imprimis/Miniscribe)

S1/2

On

IDE IOCHRDY signal from pin 27 (Quantum)

S1/3

On

Factory configured - do not alter

S1/4

Not used

Floppy drive interface enabled

S1/5

On

 

Floppy drive interface disabled

S1/5

Off

Floppy drive change signal enabled

S1/6

On

 

Floppy drive change signal disabled

S1/6

Off

Floppy drive speed select single speed

S1/7

Off

 

Floppy drive speed select two speed

S1/7

On

Floppy drive pre-compensation value select 125ns

S1/8

Off

 

Floppy drive pre-compensation value select 187ns

S1/8

On

Factory configured - do not alter

S4/4

Not used

Note: If using a Conner or Western Digital drive, ignore settings for S1/2 & S1/3.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

512KB

(2) 256K x 9

None

None

None

1MB

(2) 256K x 9

(2) 256K x 9

None

None

2MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

2MB

(2) 1M x 9

None

None

None

3MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

None

4MB

(2) 1M x 9

(2) 1M x 9

None

None

5MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

(2) 1M x 9

6MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

None

8MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

DMA CHANNEL SELECTION

Channel

J26

High

Pins 1 & 2 closed

 

Low

Pins 2 & 3 closed

PARALLEL PORT LPT/IRQ SELECTION

LPT/IRQ

S4/1 LPT1

S4/2 LPT2

S4/3 LPT3

S4/5 IRQ5

S4/6 IRQ7

 

Disabled

Off

Off

Off

Off

Off

LPT1/IRQ7

On

Off

Off

Off

On

 

LPT2/IRQ5

Off

On

Off

On

Off

 

LPT/IRQ7

Off

Off

On

Off

On

SERIAL PORT 1 COM/IRQ SELECTION

COM/IRQ

S3/1 COM1

S3/2 COM2

S3/3 COM3

S3/4 COM4

S3/5 IRQ3

S3/6 IRQ4

 

Disabled

Off

Off

Off

Off

Off

Off

COM1/IRQ4

On

Off

Off

Off

Off

On

 

COM2/IRQ3

Off

On

Off

Off

On

Off

 

COM3/IRQ4

Off

Off

On

Off

Off

On

 

COM4/IRQ3

Off

Off

Off

On

On

Off

SERIAL PORT 2 COM/IRQ SELECTION

COM/IRQ

S2/1 COM1

S2/2 COM2

S2/3 COM3

S2/4 COM4

S2/5 IRQ3

S2/6 IRQ4

 

Disabled

Off

Off

Off

Off

Off

Off

 

COM1/IRQ4

On

Off

Off

Off

Off

On

COM2/IRQ3

Off

On

Off

Off

On

Off

 

COM3/IRQ4

Off

Off

On

Off

Off

On

 

COM4/IRQ3

Off

Off

Off

On

On

Off