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# LASER COMPUTER, INC.
LASER 8088 MAIN BOARD (VER. 2)
Processor 8088
Processor Speed 10MHz
Chipset Unidentified
Maximum Onboard Memory 1664KB DRAM
BIOS Unidentified
Dimensions 270 x 218mm
I/O Options None
NPU Options 8087
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Speaker | J11 | Power LED & keylock | J12 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+-------+------------|
| | Parity enabled | JP7 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Parity disabled | JP7 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | SW1/1 | Off |
|---+-----------------------------------+-------+------------|
| » | NPU not installed | SW1/2 | Off |
|---+-----------------------------------+-------+------------|
| | NPU installed | SW1/2 | On |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | SW2/7 | N/A |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | SW2/8 | N/A |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | P2 | Bank | P3 |
| | | | | | 3 | |
|--------+---------+--------+--------+-------+-------+-------|
| 256KB | (9) | None | None | None | None | None |
| | 41256 | | | | | |
|--------+---------+--------+--------+-------+-------+-------|
| 512KB | (9) | (9) | None | None | None | None |
| | 41256 | 41256 | | | | |
|--------+---------+--------+--------+-------+-------+-------|
| 576KB | (9) | (9) | (2) | (1) | None | None |
| | 41256 | 41256 | 4464 | 4164 | | |
|--------+---------+--------+--------+-------+-------+-------|
| 640KB | (9) | (9) | (2) | (1) | (2) | (1) |
| | 41256 | 41256 | 4464 | 4164 | 4464 | 4164 |
|--------+---------+--------+--------+-------+-------+-------|
| 896KB | (9) | (9) | (2) | (1) | (2) | (1) |
| | 41256 | 41256 | 4464 | 4164 | 4464 | 4164 |
|--------+---------+--------+--------+-------+-------+-------|
| 1152KB | (9) | (9) | (2) | (1) | (2) | (1) |
| | 41256 | 41256 | 4464 | 4164 | 4464 | 4164 |
|--------+---------+--------+--------+-------+-------+-------|
| 1408KB | (9) | (9) | (2) | (1) | (2) | (1) |
| | 41256 | 41256 | 4464 | 4164 | 4464 | 4164 |
|--------+---------+--------+--------+-------+-------+-------|
| 1664KB | (9) | (9) | (2) | (1) | (2) | (1) |
| | 41256 | 41256 | 4464 | 4164 | 4464 | 4164 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 4 | Bank 5 | Bank 6 | Bank 7 |
|----------+------------+------------+-----------+-----------|
| 256KB | None | None | None | None |
|----------+------------+------------+-----------+-----------|
| 512KB | None | None | None | None |
|----------+------------+------------+-----------+-----------|
| 576KB | None | None | None | None |
|----------+------------+------------+-----------+-----------|
| 640KB | None | None | None | None |
|----------+------------+------------+-----------+-----------|
| 896KB | (9) 4164 | None | None | None |
|----------+------------+------------+-----------+-----------|
| 1152KB | (9) 4164 | (9) 4164 | None | None |
|----------+------------+------------+-----------+-----------|
| 1408KB | (9) 4164 | (9) 4164 | (9) 4164 | None |
|----------+------------+------------+-----------+-----------|
| 1664KB | (9) 4164 | (9) 4164 | (9) 4164 | (9) 4164 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/3 | SW1/4 |
|--------------------+-------------------+-------------------|
| 256KB | On | On |
|--------------------+-------------------+-------------------|
| 512KB | Off | On |
|--------------------+-------------------+-------------------|
| 576KB | On | Off |
|--------------------+-------------------+-------------------|
| 640KB | Off | Off |
|--------------------+-------------------+-------------------|
| 896KB | Off | Off |
|--------------------+-------------------+-------------------|
| 1152KB | Off | Off |
|--------------------+-------------------+-------------------|
| 1408KB | Off | Off |
|--------------------+-------------------+-------------------|
| 1664KB | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EXPANDED MEMORY BANK 4 AND 5 ADDRESS |
|------------------------------------------------------------|
| Setting | SW2/1 | SW2/2 | SW2/3 |
|---------------+--------------+--------------+--------------|
| 208h | Off | On | On |
|---------------+--------------+--------------+--------------|
| 218h | On | Off | On |
|---------------+--------------+--------------+--------------|
| 258h | Off | Off | On |
|---------------+--------------+--------------+--------------|
| 268h | On | On | Off |
|---------------+--------------+--------------+--------------|
| 2A8h | Off | On | Off |
|---------------+--------------+--------------+--------------|
| 2B8h | On | Off | Off |
|---------------+--------------+--------------+--------------|
| 2E8h | Off | Off | Off |
|---------------+--------------+--------------+--------------|
| Disabled | On | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EXPANDED MEMORY BANK 6 AND 7 ADDRESS |
|------------------------------------------------------------|
| Setting | SW2/4 | SW2/5 | SW2/6 |
|---------------+--------------+--------------+--------------|
| 208h | Off | On | On |
|---------------+--------------+--------------+--------------|
| 218h | On | Off | On |
|---------------+--------------+--------------+--------------|
| 258h | Off | Off | On |
|---------------+--------------+--------------+--------------|
| 268h | On | On | Off |
|---------------+--------------+--------------+--------------|
| 2A8h | Off | On | Off |
|---------------+--------------+--------------+--------------|
| 2B8h | On | Off | Off |
|---------------+--------------+--------------+--------------|
| 2E8h | Off | Off | Off |
|---------------+--------------+--------------+--------------|
| Disabled | On | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY DRIVE CONFIGURATION |
|------------------------------------------------------------|
| Setting | SW1/7 | SW1/8 |
|--------------------+-------------------+-------------------|
| 1 drive attached | On | On |
|--------------------+-------------------+-------------------|
| 2 drives attached | Off | On |
|--------------------+-------------------+-------------------|
| 3 drives attached | On | Off |
|--------------------+-------------------+-------------------|
| 4 drives attached | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MONITOR TYPE SELECTION |
|------------------------------------------------------------|
| Setting | SW1/5 | SW1/6 |
|--------------------+-------------------+-------------------|
| Monochrome | Off | Off |
|--------------------+-------------------+-------------------|
| CGA, 40 x 25 | Off | On |
|--------------------+-------------------+-------------------|
| CGA, 80 x 25 | On | Off |
|--------------------+-------------------+-------------------|
| EGA or no monitor | On | On |
+------------------------------------------------------------+