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MFB-A

ACER, INC.

MFB-A

Card Type

Multi I/O card

Chipset/Controller

Unidentified

I/O Options

Memory, game port, parallel port, serial port (2).

Maximum DRAM

3MB

CONNECTIONS

Purpose

Location

Purpose

Location

Game port

J2

Parallel port

J5

Serial port 2 - internal

J3

MME-A connector

N/A

Serial port 1 - external

J4

   

Note: The MME-A connector is not identified on manufacturer’s documentation

GAME PORT CONFIGURATION

Setting

SW3/6

»

Enabled

On

 

Disabled

Off

PARALLEL PORT CONFIGURATION

LPT/Address/IRQ

SW3/4

SW3/5

JP2

»

LPT1/378h/IRQ7

On

Off

Pins 1 & 2 closed

 

LPT1/378h/IRQ5

On

Off

Pins 2 & 3 closed

 

LPT2/278h/IRQ7

Off

On

Pins 1 & 2 closed

 

LPT2/278h/IRQ5

Off

On

Pins 2 & 3 closed

 

Disabled

Off

Off

N/A

SERIAL PORT 1 & 2 CONFIGURATION

Port 1

Port 2

SW3/1

SW3/2

SW3/3

»

COM1/3F8h

COM2/2F8h

On

Off

On

 

COM2/2F8h

Disabled

Off

On

Off

 

Disabled

Disabled

Off

Off

Off

SERIAL PORT 1 & 2 INTERRUPT SELECT

Port 1

Port 2

JP5

JP6

»

IRQ4

IRQ3

Pins 2 & 3 closed

Closed

 

IRQ3

Disabled

Pins 1 & 2 closed

Open

 

Disabled

Disabled

Open

Open

SERIAL PORT 1 TEST

Port 1

JP3

JP4

JP10

»

DCD signal high

Pins 2 & 3 closed

N/A

N/A

 

DCD signal ground

Pins 1 & 2 closed

N/A

N/A

»

DSR signal high

N/A

Pins 2 & 3 closed

N/A

 

DSR signal ground

N/A

Pins 1 & 2 closed

N/A

»

CTS signal high

N/A

N/A

Pins 1 & 2 closed

 

CTS signal ground

N/A

N/A

Pins 2 & 3 closed

SERIAL PORT 2 TEST

Port 2

JP7

JP8

JP9

»

DCD signal high

Pins 1 & 2 closed

N/A

N/A

 

DCD signal ground

Pins 2 & 3 closed

N/A

N/A

»

DSR signal high

N/A

Pins 1 & 2 closed

N/A

 

DSR signal ground

N/A

Pins 2 & 3 closed

N/A

»

CTS signal high

N/A

N/A

Pins 1 & 2 closed

 

CTS signal ground

N/A

N/A

Pins 2 & 3 closed

PARITY CHECK

Setting

JP1

»

Enabled

Closed

 

Disabled

Open

STARTING MEMORY ADDRESS

Memory/Address

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

256KB/040000h

On

On

On

On

On

Off

512KB/080000h

Off

On

On

On

On

On

1MB/100000h

On

Off

On

On

On

On

1.5MB/180000h

Off

Off

On

On

On

On

2MB/200000h

On

On

Off

On

On

On

2.5MB/280000h

Off

On

Off

On

On

On

3MB/300000h

On

Off

Off

On

On

On

3.5MB/380000h

Off

Off

Off

On

On

On

4MB/400000h

On

On

On

Off

On

On

4.5MB/480000h

Off

On

On

Off

On

On

5MB/500000h

On

Off

On

Off

On

On

5.5MB/580000h

Off

Off

On

Off

On

On

STARTING MEMORY ADDRESS

Memory/Address

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

6MB/600000h

On

On

Off

Off

On

On

6.5MB/680000h

Off

On

Off

Off

On

On

7MB/700000h

On

Off

Off

Off

On

On

7.5MB/780000h

Off

Off

Off

Off

On

On

8MB/800000h

On

On

On

On

Off

On

8.5MB/880000h

Off

On

On

On

Off

On

9MB/900000h

On

Off

On

On

Off

On

9.5MB/980000h

Off

Off

On

On

Off

On

10MB/A00000h

On

On

Off

On

Off

On

10.5MB/A80000h

Off

On

Off

On

Off

On

11MB/B00000h

On

Off

Off

On

Off

On

11.5MB/B80000h

Off

Off

Off

On

Off

On

12MB/C00000h

On

On

On

Off

Off

On

12.5MB/C80000h

Off

On

On

Off

Off

On

13MB/D00000h

On

Off

On

Off

Off

On

13.5.5MB/D80000h

Off

Off

On

Off

Off

On

14MB/E00000h

On

On

Off

Off

Off

On

14.5MB/E80000h

Off

On

Off

Off

Off

On

15MB/F00000h

On

Off

Off

Off

Off

On

15.5MB/F80000h

Off

Off

Off

Off

Off

On

MEMORY CONFIGURATION

Bank 0

Bank 1

Bank 2

Bank 3

Bank 4

Bank 5

SW2/1

SW2/2

SW2/3

SW2/4

128KB

N/A

N/A

N/A

N/A

N/A

On

On

On

Off

512KB

N/A

N/A

N/A

N/A

N/A

Off

On

On

On

128KB

512KB

N/A

N/A

N/A

N/A

Off

On

On

Off

512KB

512KB

N/A

N/A

N/A

N/A

On

Off

On

On

128KB

512KB

512KB

N/A

N/A

N/A

On

Off

On

Off

512KB

512KB

512KB

N/A

N/A

N/A

Off

Off

On

On

128KB

512KB

512KB

512KB

N/A

N/A

Off

Off

On

Off

128KB

512KB

512KB

512KB

N/A

N/A

On

On

Off

On

128KB

512KB

512KB

512KB

512KB

N/A

On

On

Off

Off

512KB

512KB

512KB

512KB

512KB

N/A

Off

On

Off

On

128KB

512KB

512KB

512KB

512KB

512KB

Off

On

Off

Off

512KB

512KB

512KB

512KB

512KB

512KB

On

Off

Off

On

Notes:(1) Banks 3, 4 & 5 are located on supplemental card MME-A.

(2) 4164-type chips are only used in Bank 0 and fill system base RAM from 512KB to 640KB.

(3) 41256/120ns-chips are used in all banks.