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Hedaka HED-918

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Jumper Settings

Processor

8088/V20

Processor Speed

4.77/10MHz

Chip Set

None

Max. Onboard DRAM

640KB

Cache

None

BIOS

AMI

Dimensions

217mm x 166mm

I/O Options

None

NPU Options

8087

30574-1.png

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED

CN2

Turbo LED

CN6

Speaker

CN3

External battery

CN7A

Reset switch

CN4

Keylock

CN8

Turbo switch

CN5

   

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

»

CPU type select Intel 8088

JP2

pins 1 & 2 closed

 

CPU type select NEC V-20

JP2

pins 2 & 3 closed

»

Factory configured - do not alter

SW1/1

Off

»

NPU disabled

SW1/2

On

 

NPU enabled

SW1/2

Off

DRAM CONFIGURATION

Size

44256 Chips

411000 Chips

0KB

NONE

NONE

128KB

U7

NONE

256KB

U6 & U7

NONE

384KB

U5, U6 & U7

NONE

512KB

U4, U5, U6 & U7

NONE

512KB

NONE

U4, U5, U6 & U7

640KB

U3, U4, U5, U6 & U7

NONE

640KB

U3

U4, U5, U6 & U7

DRAM JUMPER/SWITCH CONFIGURATION

Size

JP1

SW1/3

SW1/4

0KB

pins 1 & 2 closed

On

On

128KB

pins 1 & 2 closed

Off

On

256KB

pins 1 & 2 closed

Off

On

384KB

pins 1 & 2 closed

Off

On

512KB

pins 1 & 2 closed

Off

On

512KB

pins 2 & 3 closed

Off

On

640KB

pins 1 & 2 closed

On

Off

640KB

pins 2 & 3 closed

On

Off

FLOPPY DRIVE CONFIGURATION

Drives installed

SW1/7

SW1/8

1

On

On

2

Off

On

3

On

Off

4

Off

Off

MONITOR CONFIGURATION

Type

SW1/3

SW1/4

None

On

On

40 x 25 color

Off

On

80 x 25 color

On

Off

Monochrome

Off

Off

See Also