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 |
USER CONFIGURABLE SETTINGS | |||
Function |
Label |
Position | |
» |
Factory configured - do not alter |
J101 |
Unidentified |
» |
NPU clock mode select /3 |
J103 |
Closed |
NPU clock mode select direct |
J103 |
Open | |
» |
Factory configured - do not alter |
J106 |
Unidentified |
» |
Factory configured - do not alter |
J113 |
Pins 1 & 2 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 alter |
J116 |
Pins 2 & 3 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 |