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 |