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





TURBO MAIN BOARD

UNIDENTIFIED

TURBO MAIN BOARD

Processor

8088

Processor Speed

8MHz

Chip Set

Unidentified

Max. Onboard DRAM

640KB

Cache

None

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

8087

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

JP1

Turbo LED

P6 pins 1 & 2

Turbo LED

P3

Reset switch

P6 pins

Speaker

P4

Keylock

P6 pins

Turbo switch

P5

Turbo LED

P7

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Turbo enabled

P5

pins 1 & 2 closed

 

Turbo disabled

P5

pins 3 & 4 closed

Turbo enabled

SW2/1

Off

 

Turbo disabled

SW2/1

On

NPU disabled

SW2/2

On

 

NPU enabled

SW2/2

Off

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

64KB

(9) 4164

NONE

NONE

NONE

128KB

(9) 4164

(9) 4164

NONE

NONE

192KB

(9) 4164

(9) 4164

(9) 4164

NONE

256KB

(9) 4164

(9) 4164

(9) 4164

(9) 4164

256KB

(9) 41256

NONE

NONE

NONE

640KB

(9) 41256

(9) 41256

(9) 4164

(9) 4164

DRAM SWITCH CONFIGURATION

Size

SW2/3

SW2/4

64KB

On

On

128KB

Off

On

192KB

Off

On

256KB

Off

Off

640KB

Off

Off

DRAM SWITCH CONFIGURATION

Size

JP2

Bank 0 & 1 = 41256

Closed

Bank 2 & 3 = 4164

Closed

DRAM SWITCH CONFIGURATION

Size

JP2

Bank 0 & 1 = 4164

Open

Bank 2 & 3 = 4164

Open

MONITOR CONFIGURATION

Type

SW2/5

SW2/6

Monochrome

Off

Off

40 x 25 color

Off

On

80 x 25 color

On

Off

FLOPPY DRIVE CONFIGURATION

Type

SW2/7

SW2/8

1

On

On

2

Off

On

3

On

Off

4

Off

Off