UNIDENTIFIED
SA-486 VL-BUS M.B. REV. V2C
|
Processor |
CX486SX/80486SX/80487SX/AMD486DXLV/CX486DX/80486DX/80486DX2/ 80486DX4/Pentium Overdrive |
|
Processor Speed |
20/25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
ALI |
|
Max. Onboard DRAM |
128MB |
|
Cache |
128/256/512/1024KB |
|
BIOS |
Phoenix |
|
Dimensions |
254mm x 220mm |
|
I/O Options |
32-bit VESA local bus slots (3), green PC connector |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
CN1 |
Green PC connector |
JG7 |
|
Speaker |
CN2 |
Green PC connector |
JG8 |
|
Reset switch |
CN3 |
Green PC connector |
JG9 |
|
Turbo switch |
CN4 |
Green PC connector |
JG10 |
|
Turbo LED |
CN5 |
Green PC connector |
JG11 |
|
External battery |
CN6 |
32-bit VESA local bus slots |
SL1 - SL3 |
|
SMI connector |
JG6 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Turbo switch enabled |
CN4 |
Closed |
|
Turbo switch disabled |
CN4 |
Open | |
|
|
Factory configured - do not alter |
JC12 |
Open |
|
|
Factory configured - do not alter |
JC15 |
Open |
|
|
Factory configured - do not alter |
JG16 |
Open |
|
|
Factory configured - do not alter |
X2 |
Open |
|
DRAM CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
1MB |
(4) 256K x 9 |
NONE |
NONE |
|
2MB |
NONE |
NONE |
(1) 512K x 36 |
|
2MB |
NONE |
(1) 512K x 36 |
NONE |
|
4MB |
NONE |
(1) 1M x 36 |
NONE |
|
4MB |
(4) 1M x 9 |
NONE |
NONE |
|
4MB |
NONE |
NONE |
(1) 1M x 36 |
|
5MB |
(4) 256K x 9 |
(1) 1M x 36 |
NONE |
|
8MB |
(4) 1M x 9 |
(1) 1M x 36 |
NONE |
|
8MB |
NONE |
(1) 2M x 36 |
NONE |
|
8MB |
NONE |
NONE |
(1) 2M x 36 |
|
16MB |
(4) 4M x 9 |
NONE |
NONE |
|
16MB |
NONE |
(1) 4M x 36 |
NONE |
|
16MB |
NONE |
NONE |
(1) 4M x 36 |
|
17MB |
(4) 256K x 9 |
(1) 4M x 36 |
NONE |
|
20MB |
(4) 4M x 9 |
(1) 1M x 36 |
NONE |
|
20MB |
(4) 1M x 9 |
(1) 4M x 36 |
NONE |
|
20MB |
NONE |
(1) 1M x 36 |
(1) 4M x 36 |
|
20MB |
NONE |
(1) 4M x 36 |
(1) 1M x 36 |
|
32MB |
NONE |
(1) 8M x 36 |
NONE |
|
32MB |
NONE |
NONE |
(1) 8M x 36 |
|
32MB |
(4) 4M x 9 |
(1) 4M x 36 |
NONE |
|
64MB |
NONE |
(1) 16M x 36 |
NONE |
|
64MB |
NONE |
NONE |
(1) 16M x 36 |
|
64MB |
(4) 16M x 9 |
NONE |
NONE |
|
128MB |
NONE |
(1) 16M x 36 |
(1) 16M x 36 |
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
256KB |
(4) 64K x 8 |
NONE |
(1) 32K x 8 |
|
512KB |
(4) 64K x 8 |
(4) 64K x 8 |
(1) 32K x 8 |
|
512KB |
(4) 128K x 8 |
NONE |
(1) 64K x 8 |
|
1MB |
(4) 128K x 8 |
(4) 128K x 8 |
(1) 64K or 128K x 8 |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
JS1 |
JS2 |
JS3 |
JS4 |
|
128KB |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 3 closed |
|
256KB |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 4 closed |
|
256KB |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 3 closed |
|
512KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 3 & 5 closed |
|
512KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 3 closed |
|
1MB |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 4 & 6 closed |
|
CPU TYPE CONFIGURATION | |||||||
|
Type |
JC1 |
JC2 |
JC3 |
JC4 |
JC5 |
JC6 |
JC20 |
|
CX486SX |
Open |
2 & 3 |
1 & 2 |
1 & 2 |
2 & 3 |
Open |
Open |
|
80486SX |
Open |
2 & 3 |
1 & 2 |
1 & 2 |
Open |
Closed |
Closed |
|
80487SX |
1 & 2 |
1 & 2, 3 & 4 |
1 & 2 |
1 & 2 |
Open |
Closed |
Open |
|
CX486DX |
2 & 3 |
1 & 2, 3 & 4 |
1 & 2 |
1 & 2 |
2 & 3 |
Closed |
Open |
|
AMD486DX |
2 & 3 |
1 & 2, 3 & 4 |
1 & 2 |
1 & 2 |
Open |
Closed |
Open |
|
80486DX/DX2 |
2 & 3 |
1 & 2, 3 & 4 |
1 & 2 |
1 & 2 |
Open |
Closed |
Closed |
|
80486DX4 |
2 & 3 |
1 & 2, 3 & 4 |
1 & 2 |
1 & 2 |
Open |
Closed |
Closed |
|
P4S/P24S |
2 & 3 |
1 & 2, 3 & 4 |
1 & 2 |
1 & 2 |
Open |
Closed |
Closed |
|
P23S |
Open |
2 & 3 |
1 & 2 |
1 & 2 |
Open |
Closed |
Open |
|
P24T |
1 & 2 |
1 & 2, 3 & 4 |
2 & 3 |
2 & 3 |
1 & 2 |
Closed |
Closed |
|
Note: Pins designated should be in the closed position. | |||||||
|
CPU TYPE CONFIGURATION (CONT) | |||||||
|
Type |
JC22 |
JG2 |
JG3 |
JG4 |
JG5 |
JG19 |
JG20 |
|
CX486SX |
Closed |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
Closed |
1 & 2 |
|
80486SX |
Open |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
Open |
Open |
|
80487SX |
Open |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
Open |
2 & 3 |
|
CX486DX |
Closed |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
Closed |
1 & 2 |
|
AMD486DX |
Open |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
Open |
|
80486DX/DX2 |
Open |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
Open |
Open |
|
80486DX4 |
Open |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
Open |
2 & 3 |
|
P4S/P24S |
Open |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
2 & 3 |
|
P23S |
Open |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
2 & 3 |
|
P24T |
Open |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
Open |
|
Note: Pins designated should be in the closed position. | |||||||
|
CPU TYPE CONFIGURATION (CONT) | |||
|
Type |
JC7 |
JC8 |
JC9 |
|
CX486SX |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
CX486DX |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
80486DX/DX2/DX4 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
Pentium Overdrive |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
CPU SPEED CONFIGURATION | ||||
|
Speed |
JF1 |
JF2 |
JF3 |
JG13 |
|
20MHz |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
25MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
Open |
|
33MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
Open |
|
40MHz |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
50iMHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
Open |
|
50MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
Open |
|
66iMHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
Open |
|
CPU SPEED CONFIGURATION (CONT) | |||||
|
Speed |
JG14 |
JG15 |
JC10 |
JC11 |
JC13 |
|
20MHz |
Open |
Open |
1 & 2 |
1 & 2 |
1 & 2 |
|
25MHz |
1 & 2 |
Open |
1 & 2 |
1 & 2 |
1 & 2 |
|
33MHz |
Open |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
|
40MHz |
Open |
Open |
2 & 3 |
2 & 3 |
2 & 3 |
|
50iMHz |
1 & 2 |
Open |
1 & 2 |
1 & 2 |
1 & 2 |
|
50MHz |
1 & 2 |
Open |
2 & 3 |
2 & 3 |
2 & 3 |
|
66iMHz |
Open |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU SPEED CONFIGURATION (DX4) | ||
|
Speed |
JX3 |
JX4 |
|
2x |
pins 2 & 3 closed |
Open |
|
2.5x |
Open |
Closed |
|
3x |
pins 1 & 2 closed |
Open |
|
CPU VOLTAGE CONFIGURATION | ||
|
Voltage |
JX1 |
JX2 |
|
3.3v |
pins 2 & 3 closed |
Open |
|
3.45v |
pins 1 & 2 closed |
Open |
|
5v |
Open |
pins 1 & 2, 3 & 4 closed |
|
BUS SPEED CONFIGURATION | |
|
CPU speed |
J1 |
|
<=33MHz |
Open |
|
>33MHz |
Closed |
|
VESA WAIT STATE CONFIGURATION | |
|
Wait states |
J2 |
|
0 wait states |
Open |
|
1 wait state |
Closed |