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





TURBO MAINBOARD

UNIDENTIFIED

TURBO MAINBOARD

Processor

8088

Processor Speed

4.77/10MHz

Chip Set

None

Max. onboard DRAM

640KB

SRAM Cache

None

BIOS

Unknown

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

8087

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

JP1

Power LED

JP5/1 & 2

Keylock

JP3

Turbo LED

JP5/3 & 4

Reset switch

JP4

Turbo Switch

JP6

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Factory configured - do not alter

JP7

N/A

Factory configured - do not alter

JP8

N/A

Parity enabled

JP9

Closed

 

Parity disabled

JP9

Open

Factory configured - do not alter

SW1/switch 1

Off

NPU enabled

SW1/switch 2

Off

 

NPU disabled

SW1/switch 2

On

Factory configured - do not alter

SW1/switch 3

N/A

Factory configured - do not alter

SW1/switch 4

N/A

DRAM CONFIGURATION

Size

Bank 0

Parity 0

Bank 1

Parity 1

Bank 2

Parity 2

Bank 3

Parity 3

256KB

(8)41256

(1)41256

NONE

NONE

NONE

NONE

NONE

NONE

256KB

(2)44256

(1)41256

NONE

NONE

NONE

NONE

NONE

NONE

512KB

(8)41256

(1)41256

(8)41256

(1)41256

NONE

NONE

NONE

NONE

512KB

(2)44256

(1)41256

(2)44256

(1)41256

NONE

NONE

NONE

NONE

576KB

(8)41256

(1)41256

(8)41256

(1)41256

(8)41256

(1)41256

NONE

NONE

576KB

(2)44256

(1)41256

(2)44256

(1)41256

(2)44256

(1)41256

NONE

NONE

640KB

(8)41256

(1)41256

(8)41256

(1)41256

(8)41256

(1)41256

(8)41256

(1)41256

640KB

(2)44256

(1)41256

(2)44256

(1)41256

(2)44256

(1)41256

(2)44256

(1)41256

Note:When using 44256 or 4464 chips, insert the chips into the dual-size sockets.

DISPLAY CONFIGURATION

Type

SW1/switch 5

SW1/switch 6

Enhanced graphics adapter

On

On

Color/graphics (40 x 20 mode)

Off

On

Color/graphics (80 x 25 mode)

On

Off

Monochrome display adapter or both

Off

Off

DRIVE CONFIGURATION

Numper of Installed Drives

SW1/switch 7

SW1/switch 8

1 Drive installed

On

On

2 Drives installed

Off

On

3 Drives installed

On

Off

4 Drives installed

Off

Off