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. |