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ENHANCED MEMORY EXPANSION ADAPTER

IBM CORPORATION

ENHANCED MEMORY EXPANSION ADAPTER

Card Type

Multi I/O card

Maximum Onboard Memory

15.5MB DRAM

I/O Options

Serial port, parallel port, 32-pin SIMM memory slots (12)

Data Bus

16-bit ISA

CONNECTIONS

Function

Location

Function

Location

Serial port

CN1

Parallel port

CN2

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

512KB

(2) 256KB x 9

None

None

1MB

(2) 256KB x 9

(2) 256KB x 9

None

1MB

(2) 512KB x 9

None

None

1.5MB

(2) 256KB x 9

(2) 256KB x 9

(2) 256KB x 9

2MB

(2) 256KB x 9

(2) 256KB x 9

(2) 256KB x 9

2MB

(2) 512KB x 9

(2) 512KB x 9

None

2MB

(2) 1MB x 9

None

None

2.5MB

(2) 256KB x 9

(2) 512KB x 9

(2) 512KB x 9

3MB

(2) 256KB x 9

(2) 256KB x 9

(2) 256KB x 9

3MB

(2) 512KB x 9

(2) 512KB x 9

(2) 512KB x 9

3.5MB

(2) 256KB x 9

(2) 512KB x 9

(2) 512KB x 9

4MB

(2) 256KB x 9

(2) 256KB x 9

(2) 256KB x 9

4MB

(2) 1MB x 9

(2) 1MB x 9

None

4.5MB

(2) 256KB x 9

(2) 512KB x 9

(2) 512KB x 9

6MB

(2) 256KB x 9

(2) 256KB x 9

(2) 512KB x 9

6.5MB

(2) 256KB x 9

(2) 512KB x 9

(2) 512KB x 9

7MB

(2) 512KB x 9

(2) 512KB x 9

2) 512KB x 9

14MB

(2) 1MB x 9

(2) 1MB x 9

(2) 1MB x 9

DRAM CONFIGURATION (CONTíD)

Size

Bank 3

Bank 4

Bank 5

Bank 6

512KB

None

None

None

None

1MB

None

None

None

None

1MB

None

None

None

None

1.5MB

None

None

None

None

2MB

(2) 256KBx9

None

None

None

2MB

None

None

None

None

2MB

None

None

None

None

2.5MB

None

None

None

None

3MB

(2) 256KB x 9

256KB x 9

256KB x 9

None

3MB

None

None

None

None

3.5MB

(2) 512KB x 9

None

None

None

4MB

(2) 256KB x 9

(2) 256KB x 9

(2) 256KB x 9

(2) 512KB x 9

4MB

None

None

None

None

4.5MB

(2) 512KB x 9

(2) 512KB x 9

None

None

6MB

(2) 512KB x 9

(2) 512KB x 9

(2) 512KB x 9

(2) 512KB x 9

6.5MB

(2) 512KB x 9

(2) 512KB x 9

(2) 512KB x 9

(2) 512KB x 9

7MB

(2) 512KB x 9

(2) 512KB x 9

(2) 512KB x 9

(2) 512KB x 9

14MB

(2) 1MB x 9

(2) 1MB x 9

(2) 1MB x 9

(2) 1MB x 9

Note: If you are installing a mix of 256KB and 512KB SIMMís, then you must install the 256KB SIMMís first, starting at BANK 0.

When you install 1MB SIMM modules on the board, you must only use 1MB SIMM modules throughout the board.

EXPANSION MEMORY CONFIGURATION

Size

SW 1

SW 2

SW 3

SW 4

SW 5

1MB

Off

Off

Off

On

Off

1.5MB

Off

Off

Off

On

On

2MB

Off

Off

On

Off

Off

2.5MB

Off

Off

On

Off

On

3MB

Off

Off

On

On

Off

3.5MB

Off

Off

On

On

On

4MB

Off

On

Off

Off

Off

4.5MB

Off

On

Off

Off

On

5MB

Off

On

Off

On

Off

5.5MB

Off

On

Off

On

On

6MB

Off

On

On

Off

Off

6.5MB

Off

On

On

Off

On

7MB

Off

On

On

On

Off

7.5MB

Off

On

On

On

On

8MB

On

Off

Off

Off

Off

8.5MB

On

Off

Off

Off

On

9MB

On

Off

Off

On

Off

9.5MB

On

Off

Off

On

On

EXPANSION MEMORY CONFIGURATION (CONTíD)

Size

SW1

SW2

SW3

SW4

SW5

10MB

On

Off

On

Off

Off

10.5MB

On

Off

On

Off

On

11MB

On

Off

On

On

Off

11.5MB

On

Off

On

On

On

12MB

On

On

Off

Off

Off

12.5MB

On

On

Off

Off

On

13MB

On

On

Off

On

Off

13.5MB

On

On

Off

On

On

14MB

On

On

On

Off

Off

14.5MB

On

On

On

Off

On

15MB

On

On

On

On

Off

15.5MB

On

On

On

On

On

Note: If you are adding base memory, then switches 1-5 should specify a 1MB starting address.

If there is already expansion memory installed, the starting address of the adapter must follow the last address of the existing memory.

BASE MEMORY CONFIGURATION

Function

SW1/6

SW1/7

Base memory address selection (256KB)

On

Off

Base memory address selection (512KB)

Off

On

Base memory address selection (640KB)

Off

Off

Note: If you have 640KB of base memory, the switch settings depend on the amount of expansion memory you have installed.

PARALLEL PORT ADDRESS SELECTION

Setting

Label

Position

LPT1 (378h)

JN2

Pins 1 & 2, 3 & 4 closed

LPT2 (278h)

JN2

Pins 5 & 6, 7 & 8 closed

Note: 4-pin jumper module needs to be rotated 180 degrees to set either LPT1 or LPT2.

SERIAL PORT 1 ADDRESS SELECTION

Setting

Label

Position

COM1 (3F8h)

JN1

Pins 1 & 2, 3 & 4 closed

COM2 (2F8h)

JN1

Pins 5 & 6, 7 & 8 closed

Note: 4-pin jumper module needs to be rotated 180 degrees to set either COM1 or COM2.