...because we can't all be on the bleeding edge...





XT TURBO 640K

UNIDENTIFIED

XT TURBO 640K

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

305mm x 216mm

I/O Options

None

NPU Options

8087

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

JP1

Turbo switch

Z14

Reset switch

JP3

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured - do not alter (turbo BIOS)

JP4

Unidentified

Factory configured - do not alter

SW1/1

Off

 

NPU not installed

SW1/2

On

 

NPU installed

SW1/2

Off

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

128KB

(9) 4164

None

None

None

256KB

(9) 41256

None

None

None

512KB

(9) 41256

(9) 41256

None

None

640KB

(9) 41256

(9) 41256

(9) 4164

(9) 4164

DRAM SWITCH CONFIGURATION

Size

SW1/3

SW1/4

128KB

Off

On

192KB

On

Off

256KB or above

Off

Off

FLOPPY DRIVE SELECTION

Drives installed

SW1/7

SW1/8

1

On

On

2

Off

On

3

On

Off

4

Off

Off

MONITOR SELECTION

Setting

SW1/5

SW1/6

None

On

On

Color (40 x 20)

Off

On

Color (80 x 25)

On

Off

Monochrome

Off

Off