EVEREX SYSTEMS, INC.
SYSTEM 3900 (EV-1851)
|
Processor |
80386DX |
|
Processor Speed |
25/33MHz |
|
Chip Set |
C & T |
|
Max. Onboard DRAM |
8MB |
|
Cache |
64KB |
|
BIOS |
AMI |
|
Dimensions |
355mm x 304mm |
|
I/O Options |
32-bit external memory card slot |
|
NPU Options |
80387/3167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Speaker |
J17 |
Keylock |
J18 pin 9 |
|
Power LED |
J18 pin 1 |
External battery connector |
J22 |
|
Turbo LED |
J18 pin 2 |
Speaker enable/disable switch |
J23 |
|
Reset switch |
J18 pin 6 |
32-bit external memory card |
S1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
DRAM speed select 4 wait states |
J15 |
pins 1 & 2 closed | |
|
DRAM speed select 3 wait states |
J15 |
pins 2 & 3 closed | |
|
NPU mode select 1 wait state |
J16 |
pins 1 & 2 closed | |
|
NPU mode select 0 wait states |
J16 |
pins 2 & 3 closed | |
|
Factory configured - do not alter |
J19 |
Open | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(4) 256K x 9 |
NONE |
NONE |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
NONE |
NONE |
|
4MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
NONE |
NONE |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
NONE |
|
16MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
Note:Banks 2 & 3 are used when a 32-bit external memory card is installed. | ||||
|
CACHE CONFIGURATION | |
|
Size |
Bank 0 |
|
64KB |
(8) 64K x 1 |
|
Note:Cache is factory installed and is not configurable. | |
|
CMOS CONFIGURATION | ||||||||
|
Setting |
W1 |
W2 |
W3 |
W4 |
W5 |
W6 |
W7 |
W8 |
|
Internal |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
|
External |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
|
Note: Pins designated should be in the closed position. | ||||||||