DASH COMPUTER, INC.
DC 386 WB WRITE BACK-CACHE
|
Processor |
80386DX |
|
Processor Speed |
25/33/40MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
32MB |
|
Cache |
32/64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit external memory card slot |
|
NPU Options |
80387 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J23 |
Reset switch |
SW1 |
|
Speaker |
J24 |
Turbo switch |
SW2 |
|
32-bit external memeory card |
S1 |
Turbo LED |
SW3 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Monitor type select monochrome |
JP1 |
open | |
|
Monitor type select color |
JP1 |
closed | |
|
CMOS memory normal operation |
JP2 |
pins 2 & 3 closed | |
|
CMOS memory clear |
JP2 |
pins 1 & 2 closed | |
|
Bus speed select ATCLK/6 |
JP3 |
pins 1 & 2 closed | |
|
Bus speed select ATCLK/8 |
JP3 |
open | |
|
Note:Pins 3 and 4 on JP3 are not used | |||
|
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 |
|
5MB |
(4) 256K x 9 |
(4) 1M x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CACHE JUMPER CONFIGURATION | ||||||
|
Size |
JP5 |
JP6 |
JP7 |
JP8 |
JP9 |
JP10 |
|
32KB |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
open |
pins 2 & 3 |
pins 2 & 3 |
|
64KB |
pins 2 & 3 |
pins 1 & 2 |
pins 1 & 2 |
open |
pins 2 & 3 |
pins 1 & 2 |
|
128KB |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
closed |
pins 2 & 3 |
pins 1 & 2 |
|
256KB |
pins 2 & 3 |
pins 2 & 3 |
pins 2 & 3 |
closed |
pins 1 & 2 |
pins 1 & 2 |
|
Note:Pins designated should be in the closed position | ||||||
|
CACHE CONFIGURATION | ||||
|
Size |
Cache SRAM |
Location |
TAG (U32 & U33) |
Dirty Bit (U42) |
|
32KB |
(4) 8K x 8 |
Bank 0 |
(2) 4K x 4 |
(1) 4K x 4 |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(2) 4K x 4 |
(1) 4K x 4 |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(2) 16K x 4 |
(1) 16K x 1 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(2) 16K x 4 |
(1) 16K x 1 |