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INVISIBLE EMS

INVISIBLE SOFTWARE, INC.

INVISIBLE EMS

Card Type

Memory card

Maximum Onboard Memory

8192KB DRAM

Data Bus

16-bit ISA

Card Size

Three-quarter length, full-height card

USER CONFIGURABLE SETTINGS

Function

Label

Position

Parity enable

W1

Closed

Parity disable

W1

Open

High memory enable

SW1/1

Off

High memory disable

SW1/1

On

BUS TYPE SELECTION

BUS

W2

W3

W4

W5

W6

W7

W8

W9

W10

W11

XT

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

AT

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated are in the closed position.

BIT MODE SELECTION

Mode

W15

W16

W17

W18

W19

W20

8-bit

Closed

Closed

Open

Open

Open

Open

8/16-bit

Open

Open

Closed

Closed

Open

Open

16-bit

Open

Open

Open

Open

Closed

Closed

DRAM JUMPER CONFIGURATION

Size

Bank 0

Bank 1

512KB

(9) 256K x 1

(9) 256K x 1

2048KB

(9) 1M x 1

(9) 1M x 1

8192KB

(9) 4M x 1

(9) 4M x 1

Note: 16-pin memory chips should be mounted in the lower left corner of the socket. 18-pin memory chips should be mounted in the upper right corner of the socket.

MEMORY CHIP TYPE SELECTION

Type

W21

W22

256K x 1

Pins 2 & 3 closed

Pins 2 & 3 closed

1M x 1

Pins 2 & 3 closed

Pins 1 & 2 closed

4M x 1 DRAM

Pins 1 & 2 closed

Pins 1 & 2 closed

ADAPTER SELECTION

Setting

W13

W14

Primary

Pins 1 & 2 closed

Pins 1 & 2 closed

Secondary

Pins 2 & 3 closed

Pins 2 & 3 closed

I/O ADDRESS SELECTION

Setting

SW1/6

SW1/7

SW1/8

208h

Closed

Closed

Closed

218h

Closed

Closed

Open

248h

Open

Closed

Closed

258h

Open

Closed

Open

2A8h

Closed

Open

Closed

2B8h

Closed

Open

Open

2E8h

Open

Open

Closed

2F8h

Open

Open

Open

DOS BACKFILL SELECTION

Backfill

SW1/2

SW1/3

SW1/4

SW1/5

None

Closed

Closed

Closed

Closed

512K-640K

Open

Closed

Closed

Closed

384K-640K

Open

Open

Closed

Closed

256K-640K

Open

Open

Closed

Open

128K-640K

Open

Open

Open

Closed

0K-640K

Open

Open

Open

Open

384K-512K

Closed

Open

Closed

Closed

256K-512K

Closed

Open

Closed

Open

128K-512K

Closed

Open

Open

Closed

0K-512K

Closed

Open

Open

Open

Note: This feature allows user with less than 640K of onboard memory to increase DOS memory to 640K.