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# ACER, INC.
L50
+------------------------------------------------------------+
|------------------------------------------------------------|
| Data bus: | 32-bit VL-bus |
|---------------+--------------------------------------------|
| Size: | Three-quarter length, full-height card |
|---------------+--------------------------------------------|
| Hard drive | Four IDE(AT) drives |
| supported: | |
|---------------+--------------------------------------------|
| Floppy drives | Two 360KB, 720KB, 1.2MB, 1.44MB, or 2.88MB |
| supported: | drives |
+------------------------------------------------------------+
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|------------------------------------------+-----------------|
| 40-pin primary IDE(AT) connector | CN1 |
|------------------------------------------+-----------------|
| 40-pin secondary IDE(AT) connector | CN2 |
|------------------------------------------+-----------------|
| 34-pin cable connector - floppy drive | CN3 |
|------------------------------------------+-----------------|
| 10-pin serial port 1 | CN4 |
|------------------------------------------+-----------------|
| 10-pin serial port 2 | CN5 |
|------------------------------------------+-----------------|
| 16-pin game port | CN6 |
|------------------------------------------+-----------------|
| 15-pin video port | CN7 |
|------------------------------------------+-----------------|
| 25-pin parallel port | CN8 |
|------------------------------------------+-----------------|
| VESA feature connector | CN9 |
|------------------------------------------+-----------------|
| 4-pin connector - drive active LED | JP28 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VGA CONFIGURATION |
|------------------------------------------------------------|
| Mode | JP4 | JP5 |
|----------------+---------------------+---------------------|
| » | Enabled | pins 1 & 2 closed | pins 1 & 2 closed |
|---+------------+---------------------+---------------------|
| | Disabled | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|-----------------------------------+--------------+---------|
| » | IRQ9 disabled | JP3/pins 1 & | closed |
| | | 2 | |
|---+-------------------------------+--------------+---------|
| | IRQ9 enabled | JP3/pins 2 & | closed |
| | | 3 | |
|---+-------------------------------+--------------+---------|
| » | Primary IDE(AT) interface | JP6/pins 1 & | closed |
| | enabled | 2 | |
|---+-------------------------------+--------------+---------|
| | Primary IDE(AT) interface | JP6/pins 2 & | closed |
| | disabled | 3 | |
|---+-------------------------------+--------------+---------|
| » | Floppy drive interface | JP11/pins 1 | closed |
| | enabled | & 2 | |
|---+-------------------------------+--------------+---------|
| | Floppy drive interface | JP11/pins 2 | closed |
| | disabled | & 3 | |
|---+-------------------------------+--------------+---------|
| » | Ignores cable select | JP12/pins 1 | closed |
| | configuration for floppy | & 2 | |
| | drives | | |
|---+-------------------------------+--------------+---------|
| | Checks for cable select | JP12/pins 2 | closed |
| | configuration | & 3 | |
|---+-------------------------------+--------------+---------|
| » | Game port enabled | JP13/pins 1 | closed |
| | | & 2 | |
|---+-------------------------------+--------------+---------|
| | Game port disabled | JP13/pins 2 | closed |
| | | & 3 | |
|---+-------------------------------+--------------+---------|
| » | Parallel port IRQ 7 select | JP18/pins 1 | closed |
| | | & 2 | |
|---+-------------------------------+--------------+---------|
| | Parallel port IRQ 5 select | JP18/pins 2 | closed |
| | | & 3 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT ADDRESS SELECTION |
|------------------------------------------------------------|
| LPT | JP14 | JP15 |
|------------------+--------------------+--------------------|
| » | LPT1 (378h) | pins 1 & 2 closed | pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | LPT2 (278h) | pins 1 & 2 closed | pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | LPT3 (3BCh) | pins 2 & 3 closed | pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | Disabled | pins 2 & 3 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 1 ADDRESS SELECTION |
|------------------------------------------------------------|
| COM | JP21 | JP22 |
|------------------+--------------------+--------------------|
| » | COM1 (3F8h) | pins 1 & 2 closed | pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | COM2 (2F8h) | pins 1 & 2 closed | pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | COM3 (3E8h) | pins 2 & 3 closed | pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | Disabled | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 ADDRESS SELECTION |
|------------------------------------------------------------|
| COM | JP23 | JP24 |
|------------------+--------------------+--------------------|
| » | COM2 (2F8h) | pins 1 & 2 closed | pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | COM1 (3F8h) | pins 1 & 2 closed | pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | COM4 (2E8h) | pins 2 & 3 closed | pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | Disabled | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 1 INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | JP25/Pins 1 & 2 | JP26/Pins 1 & | JP27/Pins 1 & |
| | | 2 | 2 |
|----------+-----------------+---------------+---------------|
| » | IRQ4 | closed | open | open |
|---+------+-----------------+---------------+---------------|
| | IRQ3 | open | closed | open |
|---+------+-----------------+---------------+---------------|
| | IRQ5 | open | open | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | JP25/Pins 2 & 3 | JP26/Pins 2 & | JP27/Pins 2 & |
| | | 3 | 3 |
|----------+-----------------+---------------+---------------|
| » | IRQ3 | open | closed | open |
|---+------+-----------------+---------------+---------------|
| | IRQ4 | closed | open | open |
|---+------+-----------------+---------------+---------------|
| | IRQ5 | open | open | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT MODE CONFIGURATION |
|------------------------------------------------------------|
| Mode | JP16 | JP17 |
|----------------+---------------------+---------------------|
| » | SPP | pins 1 & 2 closed | pins 1 & 2 closed |
|---+------------+---------------------+---------------------|
| | EPP | pins 1 & 2 closed | pins 2 & 3 closed |
|---+------------+---------------------+---------------------|
| | ECP | pins 2 & 3 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA SELECTION FOR ECP MODE |
|------------------------------------------------------------|
| Channel | JP19 | JP20 |
|----------------+---------------------+---------------------|
| » | DMA 3 | pins 1 & 2 closed | pins 1 & 2 closed |
|---+------------+---------------------+---------------------|
| | DMA 1 | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MEMORY ADDRESSING |
|------------------------------------------------------------|
| Linear Address | JP1 | JP2 |
|------------------+--------------------+--------------------|
| » | 64MB | pins 1 & 2 closed | pins 1 & 2 closed |
|------+-----------+--------------------+--------------------|
| | 2GB | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SECONDARY IDE ADDRESS SELECTION |
|------------------------------------------------------------|
| Address | JP7 | JP8 |
|------------------+--------------------+--------------------|
| » | Secondary | pins 1 & 2 closed | pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | Primary | pins 1 & 2 closed | pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | Disabled | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SECONDARY IDE INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | JP9 | JP10 |
|------------------+--------------------+--------------------|
| » | 15 | pins 1 & 2 closed | pins 1, 2 & 3 open |
|---+--------------+--------------------+--------------------|
| | 10 | pins 1, 2 & 3 open | pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | 12 | pins 1, 2 & 3 open | pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | 14 | pins 2 & 3 closed | pins 1, 2 & 3 open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (8) 256K x 4 | None |
|------------------+--------------------+--------------------|
| 2MB | (8) 256K x 4 | (2) 256K x 16 |
+------------------------------------------------------------+