TEXT View Source
# ZENITH DATA SYSTEMS
Z-248/12
Processor 80286
Processor Speed 12MHz
Chip Set Unidentified
Video Chip Set None
Maximum Onboard Memory 6MB
Maximum Video Memory None
Cache None
BIOS Unidentified
Dimensions 355mm x 304mm
I/O Options None
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | J101 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | NPU clock mode select /3 | J103 | Closed |
|---+---------------------------------+-------+--------------|
| | NPU clock mode select direct | J103 | Open |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J106 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J113 | Pins 1 & 2 |
| | alter | | closed |
|---+---------------------------------+-------+--------------|
| » | Speaker enabled | J114 | Closed |
|---+---------------------------------+-------+--------------|
| | Speaker disabled | J114 | Open |
|---+---------------------------------+-------+--------------|
| » | Chip at U-169 is Poach 7 | J115 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Chip at U-169 is Poach 1 | J115 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J116 | Pins 2 & 3 |
| | alter | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 1MB | (2) 256K x 9 | (2) 256K x 9 | None |
|------------+---------------+---------------+---------------|
| 3MB | (2) 256K x 9 | (2) 256K x 9 | (2) 1M x 9 |
|------------+---------------+---------------+---------------|
| 6MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J102 |
|----------------------------+-------------------------------|
| 1MB | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 3MB | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 6MB | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| NPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | Type | P113 |
|-------------------+------------------+---------------------|
| 6MHz | 80287 | Pins 13 & 14 closed |
|-------------------+------------------+---------------------|
| 8MHz | 80C87 | Pins 13 & 14 closed |
|-------------------+------------------+---------------------|
| 8MHz | 80287 | Pins 7 & 8 closed |
|-------------------+------------------+---------------------|
| 12MHz | 80C87 | Pins 7 & 8 closed |
+------------------------------------------------------------+