MECER CORPORATION
B830 (REV. B)
|
Processor |
80486SX/80487SX/80486DX/80486DX2 |
|
Processor Speed |
20/25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
Unidentified |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
JP2 |
Turbo switch |
JP15 |
|
Reset switch |
JP3 |
Turbo LED |
JP16 |
|
Power LED & keylock |
JP9 |
Auxiliary keyboard connector |
JP104 |
|
Speaker |
JP10 |
32-bit VESA local bus slots |
SL1 & SL2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Factory configured - do not alter |
JP5 |
N/A |
|
|
CMOS memory normal operation |
JP6 |
Open |
|
CMOS memory clear |
JP6 |
Closed | |
|
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 CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
JP8A |
JP8B |
JP8D |
JP8E |
|
64KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
128KB |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
256KB |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
CPU TYPE CONFIGURATION | ||||
|
Type |
JP12 |
JP13 |
JP29 |
JP30 |
|
80486SX (PQFP) |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
80486SX (PGA) |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
80487SX |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
80486DX (PQFP) |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
80486DX (PGA) |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
80486DX2 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
CPU SPEED CONFIGURATION | |||
|
Speed |
JP7A |
JP8B |
JP7C |
|
20MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
25MHz |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
33MHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
40MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
50iMHz |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
50MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
66iMHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
VESA WAIT STATE CONFIGURATION | |
|
Wait states |
JP102 |
|
0 wait states |
pins 1 & 2 closed |
|
1 wait state |
pins 2 & 3 closed |
|
BUS SPEED CONFIGURATION | |
|
CPU speed |
JP103 |
|
<= 33MHz |
pins 1 & 2 closed |
|
> 33MHz |
pins 2 & 3 closed |
|
VESA BUS DELAY CONFIGURATION | |||||
|
Delay |
JP105 |
JP106 |
JP107 |
JP108 |
JP109 |
|
Normal |
Open |
Open |
1 & 2 , 4 & 5 |
Open |
Open |
|
1 delay |
1 & 2 |
Open |
2 & 3, 4 & 5 |
1 & 2 |
Open |
|
2 delays |
2 & 3 |
1 & 2 |
1 & 2, 3 & 4 |
2 & 3 |
Closed |
|
3 delays |
2 & 3 |
2 & 3 |
1 & 2, 3 & 4 |
2 & 3 |
Closed |
|
Note: Pins designated should be in the closed position. | |||||
|
VESA CARD CONFIGURATION | ||
|
Speed |
JP110 |
JP111 |
|
Normal card installed |
Closed |
Closed |
|
Weitek card installed |
Open |
Open |