UNIDENTIFIED
SIS486 P3
|
Processor |
80486SX/SL80486SX/CX486DX/AM486DX/80486DX/SL80486DX/80486DX2/ SL80486DX2/80486DX4 |
|
Processor Speed |
20/25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz |
|
Chip Set |
SIS |
|
Max. Onboard DRAM |
64MB |
|
Cache |
32/64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
250mm x 220mm |
|
I/O Options |
32-bit VESA local bus slots (3), green PC connector |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Keylock |
J1 |
Green PC connector |
JP74 |
|
Speaker |
J2 |
Green PC connector |
JP75 |
|
Turbo LED |
J4 |
Turbo switch |
S1 |
|
Reset switch |
J5 |
32-bit VESA local bus slots |
SL1 - SL3 |
|
Power LED |
LED1 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
» |
Factory configured - do not alter |
J9 |
Closed |
|
» |
Factory configured - do not alter |
J11 |
Open |
|
» |
Factory configured - do not alter |
J12 |
Open |
|
» |
CLK down by SMI control |
JP10 |
pins 1 & 2 closed |
|
CLK down by STPCLK control |
JP10 |
pins 2 & 3 closed | |
|
» |
Factory configured - do not alter |
JP17 |
pins 1 & 2 closed |
|
» |
Factory configured - do not alter |
JP20 |
pins 1 & 2 closed |
|
Monitor type select monochrome/EGA/VGA |
JP38 |
Open | |
|
Monitor type select CGA |
JP38 |
Closed | |
|
» |
CMOS memory normal operation |
JP39 |
pins 1 & 2 closed |
|
CMOS memory clear |
JP39 |
pins 2 & 3 closed | |
|
» |
Factory configured - do not alter |
JP43 |
pins 2 & 3 closed |
|
BIOS type select EPROM |
JP73 |
pins 1 & 2 closed | |
|
BIOS type select flash |
JP73 |
pins 2 & 3 closed | |
|
» |
Factory configured - do not alter |
JP78 |
pins 1 & 2 closed |
|
» |
Factory configured - do not alter |
JP79 |
pins 2 & 3 closed |
|
Turbo enabled |
TBSW |
pins 2 & 3 closed | |
|
Turbo disabled |
TBSW |
pins 1 & 2 closed | |
|
Note: The location of jumpers J9, J11, J12, JP10, JP17, JP39, JP43 and JP78 are unidentified. | |||
|
DRAM CONFIGURATION 1 | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
2MB |
NONE |
(1) 256K x 36 |
(1) 256K x 36 |
|
4MB |
NONE |
(1) 512K x 36 |
(1) 512K x 36 |
|
8MB |
NONE |
(1) 1M x 36 |
(1) 1M x 36 |
|
12MB |
NONE |
(1) 1M x 36 |
(1) 2M x 36 |
|
16MB |
NONE |
(1) 2M x 36 |
(1) 2M x 36 |
|
24MB |
NONE |
(1) 2M x 36 |
(1) 4M x 36 |
|
32MB |
NONE |
(1) 4M x 36 |
(1) 4M x 36 |
|
36MB |
NONE |
(1) 1M x 36 |
(1) 8M x 36 |
|
48MB |
NONE |
(1) 4M x 36 |
(1) 8M x 36 |
|
64MB |
NONE |
(1) 8M x 36 |
(1) 8M x 36 |
|
DRAM CONFIGURATION 2 | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
1MB |
(4) 256K x 9 |
NONE |
NONE |
|
4MB |
(4) 1M x 9 |
NONE |
NONE |
|
16MB |
(4) 4M x 9 |
NONE |
NONE |
|
64MB |
(4) 16M x 9 |
NONE |
NONE |
|
DRAM CONFIGURATION 3 | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
8MB |
(4) 1M x 9 |
NONE |
(1) 1M x 36 |
|
20MB |
(4) 1M x 9 |
NONE |
(1) 4M x 36 |
|
32MB |
(4) 4M x 9 |
NONE |
(1) 4M x 36 |
|
DRAM CONFIGURATION 4 | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
6MB |
(4) 1M x 9 |
(1) 256K x 36 |
(1) 256K x 36 |
|
8MB |
(4) 1M x 9 |
(1) 512K x 36 |
(1) 512K x 36 |
|
12MB |
(4) 1M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
|
24MB |
(4) 4M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
|
48MB |
(4) 4M x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
|
DRAM JUMPER CONFIGURATION | ||
|
Configuration |
JP45 |
JP46 |
|
1 |
pins 1 & 2 closed |
Open |
|
2 |
pins 1 & 2 closed |
Open |
|
3 |
pins 1 & 2 closed |
Open |
|
4 |
Open |
Closed |
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
32KB |
(4) 8K x 8 |
NONE |
(1) 8K x 8 |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
|
256KB (A) |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
256KB (B) |
(4) 64K x 8 |
NONE |
(1) 32K x 8 |
|
Note: The orientation of Banks 0 & 1 and the TAG is unidentified. | |||
|
CACHE JUMPER CONFIGURATION | ||||||
|
Size |
JP30 |
JP31 |
JP32 |
JP34 |
JP35 |
JP36 |
|
32KB |
1 & 2 |
1 & 2 |
1 & 2 |
Open |
1 & 2 |
1 & 2 |
|
64KB |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
2 & 3 |
1 & 2 |
|
128KB |
2 & 3 |
2 & 3 |
1 & 2 |
2 & 3, 4 & 5 |
1 & 2 |
2 & 3 |
|
256KB (A) |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2, 3 & 4 |
2 & 3 |
2 & 3 |
|
256KB (B) |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3, 4 & 5 |
1 & 2 |
2 & 3 |
|
Note: Pins designated should be in the closed position. | ||||||
|
CPU TYPE CONFIGURATION | |||||||
|
Type |
J13 |
JP8 |
JP12 |
JP13 |
JP18 |
JP19 |
JP24 |
|
80486SX |
Closed |
2 & 3 |
Open |
Open |
1 & 2 |
2 & 3 |
Open |
|
SL80486SX |
Closed |
2 & 3 |
Open |
Open |
1 & 2 |
2 & 3 |
4 & 5 |
|
CX486DX |
Open |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
2 & 3 |
|
AM486DX |
Closed |
2 & 3 |
Open |
Open |
1 & 2 |
2 & 3 |
Open |
|
80486DX |
Closed |
2 & 3 |
Open |
Open |
1 & 2 |
2 & 3 |
Open |
|
SL80486DX |
Closed |
2 & 3 |
Open |
Open |
1 & 2 |
2 & 3 |
4 & 5 |
|
80486DX2 |
Closed |
2 & 3 |
Open |
Open |
1 & 2 |
2 & 3 |
Open |
|
SL80486DX2 |
Closed |
2 & 3 |
Open |
Open |
1 & 2 |
2 & 3 |
4 & 5 |
|
80486DX4 |
Closed |
2 & 3 |
Open |
Open |
1 & 2 |
2 & 3 |
4 & 5 |
|
Note: Pins designated should be in the closed position. | |||||||
|
CPU TYPE CONFIGURATION (CON’T) | ||||||
|
Type |
JP25 |
JP28 |
JP29 |
JP33 |
JP37 |
JP40 |
|
80486SX |
Open |
Open |
Open |
2 & 3 |
Open |
2 & 3 |
|
SL80486SX |
2 & 3 |
1 & 2 |
3 & 4 |
2 & 3 |
Open |
2 & 3 |
|
CX486DX |
1 & 2, 3 & 4 |
Open |
2 & 3 |
1 & 2, 3 & 4 |
3 & 4 |
2 & 3 |
|
AM486DX |
Open |
Open |
Open |
1 & 2, 3 & 4 |
3 & 4 |
1 & 2 |
|
80486DX |
Open |
Open |
Open |
1 & 2, 3 & 4 |
3 & 4 |
2 & 3 |
|
SL80486DX |
2 & 3 |
1 & 2 |
3 & 4 |
1 & 2, 3 & 4 |
3 & 4 |
2 & 3 |
|
80486DX2 |
Open |
Open |
Open |
1 & 2, 3 & 4 |
3 & 4 |
2 & 3 |
|
SL80486DX2 |
2 & 3 |
1 & 2 |
3 & 4 |
1 & 2, 3 & 4 |
3 & 4 |
2 & 3 |
|
80486DX4 |
2 & 3 |
1 & 2 |
3 & 4 |
1 & 2, 3 & 4 |
3 & 4 |
2 & 3 |
|
Note: Pins designated should be in the closed position. | ||||||
|
CPU SPEED CONFIGURATION | |
|
Type |
JP27 |
|
Any CPU installed |
Open |
|
CX486S2 only |
Closed |
|
Note: The location of JP27 is unidentified. | |
|
CPU SPEED CONFIGURATION | |||
|
Speed |
JP5 |
JP6 |
JP7 |
|
20MHz |
Closed |
Open |
Closed |
|
25MHz |
Closed |
Closed |
Open |
|
33MHz |
Open |
Closed |
Closed |
|
40MHz |
Closed |
Open |
Open |
|
50iMHz |
Closed |
Closed |
Open |
|
50MHz |
Open |
Open |
Closed |
|
66iMHz |
Open |
Closed |
Closed |
|
75iMHz |
Closed |
Closed |
Open |
|
100iMHz |
Open |
Closed |
Closed |
|
CPU SPEED CONFIGURATION (80486DX4 ONLY) | |
|
Speed |
JP44 |
|
2x |
pins 1 & 2 closed |
|
2.5x |
pins 2 & 3 closed |
|
3x |
Open |
|
Note: The location of JP44 is unidentified. | |
|
CPU VOLTAGE CONFIGURATION | |
|
Voltage |
JP80 |
|
3.45v |
Open |
|
5v |
Closed |
|
VL BUS WAIT STATE CONFIGURATION | |
|
Wait states |
JP4 |
|
0 wait states |
pins 1 & 2 closed |
|
1 wait state |
pins 2 & 3 closed |
|
VL BUS SPEED CONFIGURATION | |
|
CPU speed |
JP3 |
|
<= 33MHz |
pins 1 & 2 closed |
|
> 33MHz |
pins 2 & 3 closed |
|
MISCELLANEOUS TECHNICAL NOTE |
|
Note: The location of pin 1 is unidentified. Many of the jumpers on this diagram are shown for location purposes only. The actual location may be different. Check mainboard for actual jumper locations. |