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





YL-A09

UNIDENTIFIED

YL-A09

Processor

80286

Processor Speed

16MHz

Chip Set

C & T Neat

Max. Onboard DRAM

8MB

Cache

None

BIOS

AMI

Dimensions

330mm x 259mm

I/O Options

None

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J3

Turbo LED

JP13

Speaker

JP11

Turbo Switch

JP14

Reset switch

JP12

Power LED & keylock

JP16

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

JP2

closed

NPU mode select synchronous with CPU

JP3

pins 1 & 2 closed

 

NPU mode select synchronous with oscillator installed at Y1

JP3

pins 2 & 3 closed

CPU speed select fast

JP14

closed

 

CPU speed select slow

JP14

open

BIOS type select 27256

JP15

pins 2 & 3 closed

 

BIOS type select 27128

JP15

pins 1 & 2 closed

Parity check enabled

JP17

pins 1 & 2 closed

 

Parity check disabled

JP17

pins 2 & 3 closed

Quiet bus enabled

JP20

pins 1 & 2 closed

 

Quiet bus disabled (Use for high speed I/O cards)

JP20

pins 2 & 3 closed

Same type of memory is used in all four banks

JP23

pins 1 & 2 closed

 

First two banks are different than last two banks of memory

JP23

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

512KB

(18) 41256

NONE

NONE

NONE

1MB

(18) 41256

(18) 41256

NONE

NONE

1.5MB

(18) 41256

(18) 41256

(2) 256K x 9

NONE

2MB

(18) 41256

(18) 41256

(2) 256K x 9

(2) 256K x 9

2MB

(18) 411000

NONE

NONE

NONE

4MB

(18) 411000

(18) 411000

NONE

NONE

6MB

(18) 411000

(18) 411000

(2) 1M x 9

NONE

8MB

(18) 411000

(18) 411000

(2) 1M x 9

(2) 1M x 9

DRAM JUMPER CONFIGURATION

Size

JP7

JP8

JP9

JP10

JP17

JP23

512KB

Open

2 & 3

Open

Open

1 & 2

1 & 2

1MB

Open

2 & 3

Open

2-3

1 & 2

1 & 2

1.5MB

1 & 2

2 & 3

Open

2-3

1 & 2

1 & 2

2MB

1 & 2

2 & 3

1 & 2

2-3

1 & 2

1 & 2

2MB

Open

2 & 3

Open

Open

1 & 2

1 & 2

4MB

Open

2 & 3

Open

2-3

1 & 2

1 & 2

6MB

1 & 2

2 & 3

Open

2-3

1 & 2

1 & 2

8MB

1 & 2

2 & 3

1 & 2

2-3

1 & 2

1 & 2

Note:Pins designated should be in the closed position.

DRAM SWITCH CONFIGURATION

Size

SW1/3

SW1/4

SW1/5

512KB

Off

Off

Off

1MB

On

Off

Off

1.5MB

Off

On

Off

2MB

On

On

Off

2MB

Off

Off

On

4MB

On

Off

On

6MB

Off

On

On

8MB

On

On

On

I/O CONFIGURATION

Setting

JP1A

JP1B

JP1C

I/O at full speed during memory refresh cycle

Open

Closed

Open

I/O at full speed during memory refresh cycle and DMA

Closed

Open

Open

I/O at full speed

Closed

Closed

Closed