ZENITH DATA SYSTEMS
Z-2500 SERIES
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 |
330mm x 218mm |
I/O Options |
None |
NPU Options |
80287 |
USER CONFIGURABLE SETTINGS | |||
Function |
Label |
Position | |
» |
Factory configured - do not alter |
J101 |
Open |
» |
NPU clock mode select mode /3 for 80287, /2 for 80C287 |
J103 |
Closed |
NPU clock mode select direct mode |
J103 |
Open | |
Parallel printer decode |
J106 |
Unidentified | |
» |
ROM DMA blocked |
J113 |
Pins 1 & 2 closed |
ROM DMA not blocked |
J113 |
Pins 2 & 3 closed | |
» |
Speaker enabled |
J114 |
Closed |
Speaker disabled |
J114 |
Open |
DRAM CONFIGURATION | ||
Size |
Bank 0 |
Bank 1 |
1MB |
(4) 256K x 9 |
None |
3MB |
(4) 256K x 9 |
(2) 1M x 9 |
6MB |
(4) 1M x 9 |
(2) 1M x 9 |
DRAM TYPE SELECTION | |
Type |
J102 |
256K x 9 in Bank 0 |
Pins 2 & 3 closed |
1M x 9 in Banks 0 & 1 |
Pins 1 & 2 closed |
SCP SPEED SELECTION | ||
Speed |
P113 | |
7.16MHz |
Pins 1 & 2 closed | |
» |
8MHz |
Pins 5 & 6 closed |
12MHz |
Pins 3 & 4 closed |
NPU SPEED SELECTION | ||||
Clock speed |
80287 |
80C287 |
P113 | |
8MHz |
2.7MHz |
4MHz |
Pins 9 & 10 closed | |
» |
16MHz |
5.3MHz |
8MHz |
Pins 13 & 14 closed |
24MHz |
8MHz |
12Hz |
Pins 7 & 8 closed | |
Note: See also J103 setting. |
POACH SELECTION | |||
Setting |
J115 |
J116 | |
» |
POACH 1 chip installed in U169 |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
POACH 7 chip installed in U169 |
Pins 1 & 2 closed |
Pins 1 & 2 closed |