JETPRO INFOTECH COMPANY, LTD.
MB-6U(MB-450CBU)
|
Processor |
80386DX/80486SX/80487SX/80486DX/80486DX2 |
|
Processor Speed |
20/25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
UMC |
|
Max. Onboard DRAM |
64MB |
|
SRAM Cache |
64/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit proprietary local bus card |
|
NPU Options |
80387/3167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Reset switch |
J5 |
Power LED & keylock |
J9 |
|
Turbo LED |
J6 |
External battery |
J11 |
|
Turbo switch |
J7 |
32-bit proprietary local bus card |
S1 |
|
Speaker |
J8 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
| » |
CMOS memory normal operation |
W1 |
closed |
|
CMOS memory clear |
W1 |
open | |
| » |
Monitor type select color |
W2 |
closed |
|
Monitor type select monochrome |
W2 |
open | |
| » |
Factory configured-do not alter |
W3 |
open |
| » |
Tag mode select write back enabled (tag installed at U45) |
W15 |
open |
|
Tag mode select write back disabled (tag not installed at U45) |
W15 |
open | |
|
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 |
|
CPU JUMPER CONFIGURATION | ||||||
|
Size |
OSC2 |
W5 |
W10 |
W11 |
W19 |
W22 |
|
80386DX/25 |
50MHz |
open |
N/A |
N/A |
open |
N/A |
|
80386DX/33 |
66MHz |
open |
N/A |
N/A |
open |
N/A |
|
80386DX/40 |
80MHz |
open |
N/A |
N/A |
open |
N/A |
|
80486SX/20 |
20MHz |
open |
open |
pins 1 & 2 |
closed |
1 & 2 and 3 & 4 |
|
80486SX/20 |
40MHz |
open |
open |
pins 2 & 3 |
closed |
1 & 2 and 3 & 4 |
|
80487SX/20 |
20MHz |
closed |
pins 2 & 3 |
pins 1 & 2 |
closed |
1 & 2 and 3 & 4 |
|
80487SX/20 |
40MHz |
closed |
pins 2 & 3 |
pins 2 & 3 |
closed |
1 & 2 and 3 & 4 |
|
80486DX/25 |
25MHz |
open |
pins 1 & 2 |
pins 1 & 2 |
closed |
1 & 2 and 3 & 4 |
|
80486DX/25 |
50MHz |
open |
pins 1 & 2 |
pins 2 & 3 |
closed |
1 & 2 and 3 & 4 |
|
80486DX/33 |
33MHz |
open |
pins 1 & 2 |
pins 1 & 2 |
closed |
1 & 2 and 3 & 4 |
|
80486DX/33 |
66MHz |
open |
pins 1 & 2 |
pins 2 & 3 |
closed |
1 & 2 and 3 & 4 |
|
80486DX/50 |
50MHz |
open |
pins 1 & 2 |
pins 1 & 2 |
closed |
1 & 2 and 3 & 4 |
|
Note:Pins designated should be in the closed position | ||||||
|
NPU JUMPER CONFIGURATION | ||
|
Size |
W8 |
W20 |
|
80387 |
closed |
closed |
|
3167 |
open |
open |
|
SRAM JUMPER CONFIGURATION | ||||
|
Jumper |
32KB |
64KB |
128KB |
256KB |
|
W12 |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
W13 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
W14 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
W15 |
open |
open |
open |
open |
|
W17 |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
W18 |
N/A |
N/A |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
SRAM CONFIGURATION | |||
|
Size |
Cache |
Locations |
TAG |
|
32KB |
(4) 8K x 8 |
Bank 0 |
(4) 16K x 4 |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(4) 16K x 4 |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(4) 16K x 4 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(4) 16K x 4 |