TEXT View Source
# LAVA COMPUTER MANUFACTURING, INC.
MULTIFUNCTION BOARD
Card Type Multifunction
Chip Set Unidentified
Maximum Onboard Memory 512KB DRAM
I/O Options Parallel port, serial port
Hard Drives supported None
Floppy drives supported None
Data Bus 8-bit ISA
Card Size Full-length, full-height
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|-----------------------+-------+--------------------+-------|
| 26-pin parallel port | CN1 | 25-pin serial port | CN2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------------+-------+-----------|
| » | Parity check enabled | J4 | Closed |
|---+------------------------------------+-------+-----------|
| | Parity check disabled | J4 | Open |
|---+------------------------------------+-------+-----------|
| » | Real Time Clock enabled | J9 | Closed |
|---+------------------------------------+-------+-----------|
| | Real Time Clock disabled | J9 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|--------------+---------------+--------------+--------------|
| 64KB | 64KB | None | None |
|--------------+---------------+--------------+--------------|
| 128KB | 64KB | 64KB | None |
|--------------+---------------+--------------+--------------|
| 192KB | 64KB | 64KB | 64KB |
|--------------+---------------+--------------+--------------|
| 256KB | 256KB | None | None |
|--------------+---------------+--------------+--------------|
| 320KB | 256KB | 64KB | None |
|--------------+---------------+--------------+--------------|
| 384KB | 256KB | 64KB | 64KB |
|--------------+---------------+--------------+--------------|
| 512KB | 256KB | 256KB | None |
|------------------------------------------------------------|
| Note:Size of chips is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | SW/4 | SW/5 | SW/6 |
|---------------+--------------+--------------+--------------|
| None | On | On | On |
|---------------+--------------+--------------+--------------|
| 64KB | On | On | Off |
|---------------+--------------+--------------+--------------|
| 128KB | On | Off | On |
|---------------+--------------+--------------+--------------|
| 192KB | On | Off | Off |
|---------------+--------------+--------------+--------------|
| 256KB | Off | On | On |
|---------------+--------------+--------------+--------------|
| 320KB | Off | On | Off |
|---------------+--------------+--------------+--------------|
| 384KB | Off | Off | On |
|---------------+--------------+--------------+--------------|
| 512KB | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| STARTING MEMORY ADDRESS CONFIGURATION |
|------------------------------------------------------------|
| Starting | Maximum RAM on LAVA | SW/1 | SW/2 | SW/3 |
| Address | Multifunction Board | | | |
|----------+----------------------------+------+------+------|
| 64KB | 512KB | On | On | On |
|----------+----------------------------+------+------+------|
| 128KB | 512KB | On | On | Off |
|----------+----------------------------+------+------+------|
| 192KB | 512KB | On | Off | On |
|----------+----------------------------+------+------+------|
| 256KB | 384KB | On | Off | Off |
|----------+----------------------------+------+------+------|
| 320KB | 320KB | Off | On | On |
|----------+----------------------------+------+------+------|
| 384KB | 256KB | Off | On | Off |
|----------+----------------------------+------+------+------|
| 448KB | 192KB | Off | Off | On |
|----------+----------------------------+------+------+------|
| 512KB | 128KB | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | J7 | J8 |
|-----------------------+------------------+-----------------|
| LPT1 (378h) | Closed | Open |
|-----------------------+------------------+-----------------|
| LPT2 (278h) | Open | Closed |
|-----------------------+------------------+-----------------|
| Disabled | Open | Open |
|------------------------------------------------------------|
| Note: When IBM Monochrome Display/Printer adapter is |
| installed in the system, the parallel port will |
| automatically be reconfigured to LPT2 if the original |
| setting was LPT1 and to LPT3 if the original setting |
| was LPT2. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | J5 | J6 |
|------------------------+-----------------+-----------------|
| » | COM1 (3F8h) | Closed | Open |
|---+--------------------+-----------------+-----------------|
| | COM2 (2F8h) | Open | Closed |
|---+--------------------+-----------------+-----------------|
| | Disabled | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | J2(pins 1 & 2) | J3(pins 2 & 3) |
|--------------------+-------------------+-------------------|
| » | IRQ4 (COM1) | Open | Closed |
|---+----------------+-------------------+-------------------|
| | IRQ3 (COM2) | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ7 | J1 |
|-------------------------------+----------------------------|
| Enabled | Closed |
|-------------------------------+----------------------------|
| Disabled | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| The LAVA Multifunction Board requires switch settings on |
| system board for PC-1, PC-2 and PC-XT. On PC-1 and PC-2 |
| switches are set to represent total amount of memory |
| installed. On PC-XT, switches represent amount of memory |
| installed on system board only and do not include memory |
| on Lava Multifunction Board. |
+------------------------------------------------------------+