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8MHZ SYSTEM BOARD

UNIDENTIFIED

8MHZ SYSTEM BOARD

Processor

8088

Processor Speed

4.77/8MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

640KB

Maximum Video Memory

None

Cache

None

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

8087

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

JP1

Speaker

JP4

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured - do not alter

SW1/1

Off

 

NPU not installed

SW1/2

On

 

NPU installed

SW1/2

Off

DRAM CONFIGURATION

Note: The location of the banks are unidentified. The number and type of memory chips is unidentified.

DRAM SWITCH CONFIGURATION

Size

SW1/3

SW1/4

128KB

Off

On

192KB

On

Off

256KB

Off

Off

DRAM JUMPER CONFIGURATION

Size

JP3

4164 chips installed

Pins 2 & 3 closed

41256 & 4164 chips installed

Pins 1 & 2 closed

CPU SPEED SELECTION

Speed

JP2

4.77MHz

Closed

8MHz

Open

FLOPPY DRIVE SELECTION

Drives installed

SW1/7

SW1/8

1

On

On

2

Off

On

3

On

Off

4

Off

Off

MONITOR SELECTION

Multiplier

SW1/5

SW1/6

None

On

On

Color (40 x 20)

Off

On

Color (80 x 25)

On

Off

Monochrome

Off

Off