COMPUTREND SYSTEMS, INC.
UMC-386 (MS-3131 Ver. 1.1)
|
Processor |
80386DX |
|
Processor Speed |
33/40MHz |
|
Chip Set |
UMC |
|
Max. Onboard DRAM |
32MB |
|
SRAM Cache |
32/64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
220mm x 220mm |
|
I/O Options |
Auxiliary keyboard connector |
|
NPU Options |
80387 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J1 |
Turbo switch |
J2/15 - 17 |
|
Power LED & keylock |
J2/1 - 5 |
Turbo LED |
J2/12 & 13 |
|
Speaker |
J2/7 - 10 |
Auxiliary keyboard |
KB2 |
|
Reset switch |
J2/19 & 20 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Monitor type select monochrome |
JP1 |
open | |
|
Monitor type select color |
JP1 |
closed | |
|
NPU disabled |
JP3 JP9 |
open open | |
|
NPU endabled |
JP3 JP9 |
closed closed | |
|
Battery select internal |
J1 |
pins 2 & 3 closed | |
|
battery select external |
J1 |
connected | |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(4) 256K x 9 |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CACHE JUMPER CONFIGURATION | ||||||||
|
Size |
JP4 |
JP5 |
JP6 |
JP7 |
JP8 |
JP11 |
JP12 |
JP13 |
|
32KB |
open |
open |
pins 2 & 3 |
pins 1 & 2 |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
open |
|
64KB |
open |
open |
pins 2 & 3 |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
pins 2 & 3 |
closed |
|
128KB |
closed |
open |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
pins 1 & 2 |
pins 2 & 3 |
closed |
|
256KB |
closed |
closed |
pins 2 & 3 |
pins 2 & 3 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
closed |
|
Note:Pins designated should be in the closed position. | ||||||||
|
CACHE CONFIGURATION | |||
|
Size |
Cache SRAM |
Location |
TAG |
|
32KB |
(4) 8K x 8 |
Bank 0 |
(1) 8K x 8 |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 8K x 8 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 32K x 8 |