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B158

UNIDENTIFIED

B158

Processor

V 20 (exact location unidentified)

Processor Speed

4MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

1MB

Maximum Video Memory

None

Cache

None

BIOS

NEL

Dimensions

254mm x 218mm

I/O Options

None

NPU Options

8087 (exact location unidentified)

CONNECTIONS

Purpose

Location

Purpose

Location

Keylock

J1

Turbo LED

J4

Speaker

J2

Turbo switch

J5

Power LED

J3

Reset switch

J6

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

DRAM parity check disabled

SWA/1

On

 

DRAM parity check enabled

SWA/1

Off

Factory configured - do not alter

SWA/2

On

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 2A

Bank 3

Bank 3A

Bank 4

512KB

(9) 41256

(9) 41256

None

None

None

None

None

640KB

(9) 41256

(9) 41256

(2) 4464

(1) 4164

(2) 4464

(1) 4164

None

1MB

None

None

None

None

None

None

(9) 411000

DRAM JUMPER/SWITCH CONFIGURATION

Size

JP1

SWA/3

SWA/4

None

Closed

On

On

512KB

Closed

Off

On

640KB

Closed

On

Off

1MB

Open

Off

Off

MONITOR SELECTION

Setting

SWA/5

SWA/6

None

On

On

Monochrome

Off

Off

Color 40 x 25

Off

On

Color 80 x 25

On

Off

FLOPPY DRIVE SELECTION

Drives installed

SWA/7

SWA/8

1

On

On

2

Off

On

3

On

Off

4

Off

Off