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# 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
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Game port | J2 | Parallel port | J5 |
|---------------------+----------+----------------+----------|
| Serial port 2 - | J3 | MME-A | N/A |
| internal | | connector | |
|---------------------+----------+----------------+----------|
| Serial port 1 - | J4 | | |
| external | | | |
|------------------------------------------------------------|
| 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 | N/A | N/A |
| | | closed | | |
|---+-----------------+------------+------------+------------|
| | DCD signal | Pins 1 & 2 | N/A | N/A |
| | ground | closed | | |
|---+-----------------+------------+------------+------------|
| » | DSR signal high | N/A | Pins 2 & 3 | N/A |
| | | | closed | |
|---+-----------------+------------+------------+------------|
| | DSR signal | N/A | Pins 1 & 2 | N/A |
| | ground | | closed | |
|---+-----------------+------------+------------+------------|
| » | CTS signal high | N/A | N/A | Pins 1 & 2 |
| | | | | closed |
|---+-----------------+------------+------------+------------|
| | CTS signal | N/A | N/A | Pins 2 & 3 |
| | ground | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 TEST |
|------------------------------------------------------------|
| Port 2 | JP7 | JP8 | JP9 |
|---------------------+------------+------------+------------|
| » | DCD signal high | Pins 1 & 2 | N/A | N/A |
| | | closed | | |
|---+-----------------+------------+------------+------------|
| | DCD signal | Pins 2 & 3 | N/A | N/A |
| | ground | closed | | |
|---+-----------------+------------+------------+------------|
| » | DSR signal high | N/A | Pins 1 & 2 | N/A |
| | | | closed | |
|---+-----------------+------------+------------+------------|
| | DSR signal | N/A | Pins 2 & 3 | N/A |
| | ground | | closed | |
|---+-----------------+------------+------------+------------|
| » | CTS signal high | N/A | N/A | Pins 1 & 2 |
| | | | | closed |
|---+-----------------+------------+------------+------------|
| | CTS signal | N/A | N/A | Pins 2 & 3 |
| | ground | | | 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 |Bank |Bank |Bank |Bank |SW2/1|SW2/2|SW2/3|SW2/4|
| | 1 | 2 | 3 | 4 | 5 | | | | |
|------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
|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. |
+------------------------------------------------------------+