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# ZENITH DATA SYSTEMS
Z-159
Processor 8088
Processor Speed 4.77/8MHz
Chip Set Unidentified
Video Chip Set None
Maximum Onboard Memory 1.2MB
Maximum Video Memory None
Cache None
BIOS Unidentified
Dimensions Unidentified
I/O Options External memory card, CPU slot
NPU Options 8087
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| Video slot | SL1 | Floppy drive slot | SL4 |
|------------------+----------+-------------------+----------|
| Hard drive slot | SL2 | Memory slot | SL5 |
|------------------+----------+-------------------+----------|
| CPU slot | SL3 | | |
+------------------------------------------------------------+
IMG IMG 2
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location |
|-------------------------------+----------------------------|
| Clock speed switch | CN1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+---------+----------|
| | Floppy drives enabled | SW101/0 | Off |
|---+-----------------------------------+---------+----------|
| | Floppy drives disabled | SW101/0 | On |
|---+-----------------------------------+---------+----------|
| | NPU not installed | SW101/1 | On |
|---+-----------------------------------+---------+----------|
| | NPU installed | SW101/1 | Off |
|---+-----------------------------------+---------+----------|
| | Memory wait state select 3 wait | SW101/2 | Off |
| | states | | |
|---+-----------------------------------+---------+----------|
| | Memory wait state select 0 wait | SW101/2 | On |
| | state | | |
|---+-----------------------------------+---------+----------|
| | Monitor ROM RAM protected | SW101/3 | Off |
|---+-----------------------------------+---------+----------|
| | Monitor ROM RAM unprotected | SW101/3 | On |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | SW102/0 | On |
|---+-----------------------------------+---------+----------|
| | Video refresh rate select 50Hz | SW102/7 | Off |
|---+-----------------------------------+---------+----------|
| | Video refresh rate select 60Hz | SW102/7 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Note: The size of the memory chips is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | SW102/1 | SW102/2 | SW102/3 | SW102/4 |
|----------+------------+------------+-----------+-----------|
| 256KB | Off | Off | On | On |
|----------+------------+------------+-----------+-----------|
| 320KB | On | On | Off | On |
|----------+------------+------------+-----------+-----------|
| 384KB | Off | On | Off | On |
|----------+------------+------------+-----------+-----------|
| 448KB | On | Off | Off | On |
|----------+------------+------------+-----------+-----------|
| 512KB | Off | Off | Off | On |
|----------+------------+------------+-----------+-----------|
| 576KB | On | On | On | Off |
|----------+------------+------------+-----------+-----------|
| 640KB | Off | On | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SYSTEM AUTO BOOT CONFIGURATION |
|------------------------------------------------------------|
| Setting | SW102/5 | SW102/6 |
|--------------------+-------------------+-------------------|
| Monitor | On | On |
|--------------------+-------------------+-------------------|
| Floppy drive | Off | On |
|--------------------+-------------------+-------------------|
| Hard drive | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY DRIVE SELECTION |
|------------------------------------------------------------|
| Drives installed | SW101/6 | SW101/7 |
|--------------------+-------------------+-------------------|
| 1 | On | On |
|--------------------+-------------------+-------------------|
| 2 | Off | On |
|--------------------+-------------------+-------------------|
| 3 | On | Off |
|--------------------+-------------------+-------------------|
| 4 | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MONITOR SELECTION |
|------------------------------------------------------------|
| Drives installed | SW101/4 | SW101/5 |
|--------------------+-------------------+-------------------|
| EGA | On | On |
|--------------------+-------------------+-------------------|
| Color (40 x 25) | Off | On |
|--------------------+-------------------+-------------------|
| Color (80 x 25) | On | Off |
|--------------------+-------------------+-------------------|
| Monochrome | Off | Off |
+------------------------------------------------------------+
IMG IMG 3
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location |
|-------------------------------+----------------------------|
| Parallel port | CN1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|--------------------------------------+----------+----------|
| » | EMS RAM has system RAM | SW401/1 | Off |
|---+----------------------------------+----------+----------|
| | EMS RAM only | SW401/1 | On |
|---+----------------------------------+----------+----------|
| » | Memory size select 640KB | SW401/2 | Off |
|---+----------------------------------+----------+----------|
| | Memory size select 512KB | SW401/2 | On |
|---+----------------------------------+----------+----------|
| » | EMS RAM disabled | SW401/3 | On |
|---+----------------------------------+----------+----------|
| | EMS RAM enabled | SW401/3 | Off |
|---+----------------------------------+----------+----------|
| » | EMS frame address select D0000 – | SW401/4 | Off |
| | DFFFF | | |
|---+----------------------------------+----------+----------|
| | EMS frame address select E0000 – | SW401/4 | On |
| | EFFFF | | |
|---+----------------------------------+----------+----------|
| » | Parallel port IRQ7 enabled | SW401/7 | On |
|---+----------------------------------+----------+----------|
| | Parallel port IRQ7 disabled | SW401/7 | Off |
|---+----------------------------------+----------+----------|
| » | EMS upgrade not installed | SW401/10 | Off |
|---+----------------------------------+----------+----------|
| | EMS upgrade installed | SW401/10 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EMC CARD SELECTION |
|------------------------------------------------------------|
| Card | SW401/5 | SW401/6 |
|------------------+--------------------+--------------------|
| 1 | On | On |
|------------------+--------------------+--------------------|
| 2 | On | Off |
|------------------+--------------------+--------------------|
| 3 | Off | On |
|------------------+--------------------+--------------------|
| 4 | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | SW401/8 | SW401/9 |
|--------------------+-------------------+-------------------|
| LPT1 (378 - 37A) | Off | On |
|--------------------+-------------------+-------------------|
| LPT2 (3BC – 3BE) | On | Off |
|--------------------+-------------------+-------------------|
| 278 – 27A | On | On |
|--------------------+-------------------+-------------------|
| Disabled | Off | Off |
+------------------------------------------------------------+