ZENITH DATA SYSTEMS
Z-157 MODEL 2/MODEL 3
|
Processor |
8088 |
|
Processor Speed |
4.77MHz |
|
Chip Set |
Unidentified |
|
Max. Onboard DRAM |
640KB |
|
Cache |
None |
|
BIOS |
Unidentified |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
Parallel port/keyboard slot |
|
NPU Options |
8087 |
|
CONNECTIONS | |
|
Purpose |
Location |
|
Propietary parallel port/keyboard slot |
S1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Switch |
Position | |
|
|
RAM parity checking enabled |
SW1/2 |
On |
|
RAM parity checking disabled |
SW1/2 |
Off | |
|
|
RAM over 256KB on mother board |
SW1/3 |
On |
|
RAM over 256KB on external memory card |
SW1/3 |
Off | |
|
|
Parallel port enabled |
SW1/6 |
On |
|
Parallel port disabled |
SW1/6 |
Off | |
|
|
Floppy controller enabled |
SW1/7 |
On |
|
Floppy controller disabled |
SW1/7 |
Off | |
|
DRAM CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
512KB |
(9) 41256 |
(9) 41256 |
NONE |
|
640KB |
(9) 41256 |
(9) 41256 |
(9) 4164 |
|
BOOT CONFIGURATION | ||
|
Setting |
SW1/0 |
SW1/1 |
|
MFM-150 Monitor RAM |
Off |
Off |
|
MFM-150 Monitor RAM |
On |
On |
|
Floppy disk |
Off |
On |
|
Hard Drive |
On |
Off |
|
MONITOR CONFIGURATION | ||
|
Setting |
SW1/4 |
SW1/5 |
|
Monochrome |
Off |
Off |
|
CGA |
On |
Off |
|
EGA |
On |
On |
|
MISCELLANEOUS TECHNICAL NOTE |
|
Note: Position 1 on SW1 is unidentified. |