UNIDENTIFIED
SIS 486-471 VL BUS 5/3.3V
Processor | CX486S/80486SX/CX486DX/80486DX/80486DX2/80486DX4/Pentium Overdrive |
Processor Speed | 20/25/33/40/50(internal)/50/66(internal)MHz |
Chip Set | SIS |
Max. Onboard DRAM | 128MB |
Cache | 64/128/256/512KB |
BIOS | AMI |
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 |
External battery | J1 | Reset switch | J6 |
Green PC connector | J2 | Power LED & keylock | J7 |
Turbo switch | J3 | Break switch connector | JP26 |
Turbo LED | J4 | 32-bit VESA local bus slots | SL1 - SL3 |
Speaker | J5 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Turbo switch enabled | J3 | pins 1 & 2 closed |
Turbo switch disabled | J3 | pins 2 & 3 closed | |
Use for break switch | J3 | pins 4 & 5 closed | |
» | CMOS memory normal operation | JP16 | pins 1 & 2 closed |
CMOS memory clear | JP16 | pins 2 & 3 closed | |
» | Monitor type select VGA/EGA/monochrome | JP17 | Open |
Monitor type select CGA | JP17 | Closed | |
» | CX486S2 CPU not installed | JP18 | Open |
CX486S2 CPU installed | JP18 | Closed | |
» | RC pin for break switch | JP19 | pins 1 & 2 closed |
RC pin for RC | JP19 | pins 2 & 3 closed | |
» | Factory configured - do not alter | JP20 | pins 2 & 3 closed |
» | Factory configured - do not alter | JP23 | pins 1 & 2 closed |
» | J3 set with pins open | JP27 | Closed |
J3 set with pins 4 & 5 closed | JP27 | Open | |
» | Factory configured - do not alter | JP43 | pins 1 & 2 closed |
DRAM CONFIGURATION (TABLE 1) | |||
Size | Bank 0 | Bank 1 | Bank 2 |
1MB | (4) 256K x 9 | NONE | NONE |
2MB | (4) 256K x 9 | (1) 256K x 36 | NONE |
4MB | (4) 1M x 9 | NONE | NONE |
5MB | (4) 256K x 9 | (1) 1M x 36 | NONE |
6MB | (4) 256K x 9 | (1) 256K x 36 | (1) 1M x 36 |
8MB | (4) 1M x 9 | (1) 1M x 36 | NONE |
12MB | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x 36 |
16MB | (4) 4M x 9 | NONE | NONE |
17MB | (4) 256K x 9 | (1) 4M x 36 | NONE |
18MB | (4) 256K x 9 | (1) 256K x 36 | (1) 4M x 36 |
20MB | (4) 1M x 9 | (1) 4M x 36 | NONE |
24MB | (4) 1M x 9 | (1) 1M x 36 | (1) 4M x 36 |
32MB | (4) 4M x 9 | (1) 4M x 36 | NONE |
34MB | (4) 256K x 9 | (1) 256K x 36 | (1) 8M x 36 |
36MB | (4) 1M x 9 | (1) 4M x 36 | (1) 4M x 36 |
48MB | (4) 4M x 9 | (1) 8M x 36 | NONE |
48MB | (4) 4M x 9 | (1) 8M x 36 | NONE |
52MB | (4) 1M x 9 | (1) 4M x 36 | (1) 8M x 36 |
64MB | (4) 4M x 9 | (1) 4M x 36 | (1) 8M x 36 |
64MB | (4) 16M x 9 | NONE | NONE |
68MB | (4) 1M x 9 | (1) 8M x 36 | (1) 8M x 36 |
80MB | (4) 4M x 9 | (1) 8M x 36 | (1) 8M x 36 |
96MB | (4) 16M x 9 | (1) 8M x 36 | NONE |
128MB | (4) 16M x 9 | (1) 8M x 36 | (1) 8M x 36 |
DRAM CONFIGURATION (TABLE 2) | |||
Size | Bank 0 | Bank 1 | Bank 2 |
1MB | (1) 256K x 36 | NONE | NONE |
2MB | (1) 256K x 36 | (1) 256K x 36 | NONE |
4MB | (1) 1M x 36 | NONE | NONE |
5MB | (1) 256K x 36 | (1) 1M x 36 | NONE |
6MB | (1) 256K x 36 | (1) 256K x 36 | (4) 1M x 9 |
8MB | (1) 2M x 36 | NONE | NONE |
12MB | (1) 1M x 36 | (1) 1M x 36 | (4) 1M x 9 |
16MB | (1) 2M x 36 | (1) 2M x 36 | NONE |
16MB | (1) 4M x 36 | NONE | NONE |
17MB | (1) 256K x 36 | (1) 4M x 36 | NONE |
18MB | (1) 256K x 36 | (1) 256K x 36 | (4) 4M x 9 |
20MB | (1) 1M x 36 | (1) 4M x 36 | NONE |
24MB | (1) 1M x 36 | (1) 1M x 36 | (4) 4M x 9 |
32MB | (1) 4M x 36 | (1) 4M x 36 | NONE |
32MB | (1) 8M x 36 | NONE | NONE |
36MB | (1) 1M x 36 | (1) 4M x 36 | (4) 4M x 9 |
36MB | (1) 1M x 36 | (1) 8M x 36 | NONE |
48MB | (1) 4M x 36 | (1) 4M x 36 | (4) 4M x 9 |
48MB | (1) 4M x 36 | (1) 8M x 36 | NONE |
64MB | (1) 8M x 36 | (1) 8M x 36 | NONE |
72MB | (1) 1M x 36 | (1) 1M x 36 | (4) 16M x 9 |
96MB | (1) 4M x 36 | (1) 4M x 36 | (4) 16M x 9 |
128MB | (1) 8M x 36 | (1) 8M x 36 | (4) 16M x 9 |
DRAM JUMPER CONFIGURATION | ||
Configuration | JP36 | JP37 |
Table 1 | pins 1 & 2 closed | pins 2 & 3 closed |
Table 2 | pins 2 & 3 closed | pins 1 & 2 closed |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 4K x 8 |
128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 16K x 8 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
512KB | (4) 128K x 8 | NONE | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | |||||||
Size | JP1 | JP2 | JP3 | JP4 | JP33 | JP34 | JP35 |
64KB | 2 & 3 | 1 & 2 | 2 & 3, 4 & 5 | 1 & 2 | 1 & 2 | 1 & 2 | Open |
128KB | 1 & 2 | 1 & 2 | 1 & 2, 3 & 4 | 1 & 2 | 2 & 3 | 2 & 3 | Open |
256KB | 2 & 3 | Open | 2 & 3, 4 & 5 | Open | 2 & 3 | 2 & 3 | Closed |
256KB | 2 & 3 | 2 & 3 | 2 & 3, 4 & 5 | 1 & 2 | 2 & 3 | 2 & 3 | Open |
512KB | 1 & 2 | 2 & 3 | 1 & 2, 3 & 4 | 2 & 3 | 2 & 3 | 2 & 3 | Open |
Note: Pins designated should be in the closed position. |
CPU TYPE CONFIGURATION | ||
Type | JP30 | JP31 |
P24D | Closed | Closed |
All other CPU | Open | Open |
CPU TYPE CONFIGURATION | |||||
Type | JP8 | JP9 | JP10 | JP11 | JP12 |
CX486SX | 2 & 3 | Closed | 2 & 3 | Open | 2 & 3, 4 & 5 |
80486SX | 2 & 3 | Open | 2 & 3 | Open | Open |
SLE486SX | 2 & 3 | Open | 2 & 3 | Open | 3 & 4 |
CX486DX | 1 & 2 | Closed | 2 & 3 | 3 & 4 | 2 & 3 |
SLE486DX | 1 & 2 | Closed | 2 & 3 | 3 & 4 | 3 & 4 |
80486DX | 1 & 2 | Closed | 2 & 3 | 3 & 4 | Open |
SLE486DX2 | 1 & 2 | Closed | 2 & 3 | 3 & 4 | 3 & 4 |
80486DX4 | 1 & 2 | Closed | 2 & 3 | 3 & 4 | 3 & 4 |
P24D | 1 & 2 | Closed | 1 & 2 | 3 & 4 | 1 & 2, 3 & 4 |
P24T | 1 & 2 | Closed | 1 & 2 | 2 & 3 | 3 & 4 |
Note: Pins designated should be in the closed position. |
CPU TYPE CONFIGURATION (CON’T) | |||||
Type | JP13 | JP14 | JP15 | JP21 | JP22 |
CX486SX | Open | 1 & 2, 3 & 4 | 2 & 3 | 1 & 2 | 2 & 3 |
80486SX | Open | Open | Open | 2 & 3 | 1 & 2 |
SLE486SX | 1 & 2 | 2 & 3 | 4 & 5 | 2 & 3 | 1 & 2 |
CX486DX | Open | 1 & 2, 3 & 4 | 2 & 3 | 1 & 2 | 2 & 3 |
SLE486DX | 1 & 2 | 2 & 3 | 4 & 5 | 2 & 3 | 1 & 2 |
80486DX | Open | Open | Open | 2 & 3 | 1 & 2 |
SLE486DX2 | 1 & 2 | 2 & 3 | 4 & 5 | 2 & 3 | 1 & 2 |
80486DX4 | 1 & 2 | 2 & 3 | 4 & 5 | 2 & 3 | 1 & 2 |
P24D | 2 & 3 | 2 & 3 | 4 & 5 | 2 & 3 | 1 & 2 |
P24T | Open | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 |
Note: Pins designated should be in the closed position. |
CPU TYPE CONFIGURATION (CON’T) | |||||
Type | JP24 | JP25 | JP32 | JP41 | JP42 |
CX486SX | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3, 5 & 6 | Closed |
80486SX | Open | Open | 1 & 2 | 2 & 3, 5 & 6 | Closed |
SLE486SX | Open | Open | 2 & 3 | 2 & 3, 5 & 6 | Closed |
CX486DX | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3, 5 & 6 | Closed |
SLE486DX | Open | Open | 2 & 3 | 2 & 3, 5 & 6 | Closed |
80486DX | Open | Open | 1 & 2 | 2 & 3, 5 & 6 | Closed |
SLE486DX2 | Open | Open | 2 & 3 | 2 & 3, 5 & 6 | Closed |
80486DX4 | Open | Open | 2 & 3 | 1 & 2, 4 & 5 | Open |
P24D | Open | 1 & 2 | 2 & 3 | 2 & 3, 5 & 6 | Closed |
P24T | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3, 5 & 6 | Closed |
Note: Pins designated should be in the closed position. |
CPU VOLTAGE CONFIGURATION | |
Voltage | JP41 |
3.3v | pins 1 & 2, 4 & 5 closed |
5.0v (DX4) | pins 2 & 3, 5 & 6 closed |
Note: If Q4, Q5, and Q6 are installed or Q6 only installed, set JP41 with pins 1 & 2, 4 & 5 closed. |
CPU SPEED CONFIGURATION (U16-AVASEM/AV9107-03/KTS0147C) | |||
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 |
CPU SPEED CONFIGURATION (U17-MX8315) | |||
Speed | JP5 | JP6 | JP7 |
20MHz | Open | Open | Open |
25MHz | Open | Closed | Open |
33MHz | Closed | Closed | Closed |
40MHz | Open | Closed | Closed |
50iMHz | Open | Closed | Open |
50MHz | Closed | Open | Open |
66iMHz | Closed | Closed | Closed |
VESA WAIT STATE CONFIGURATION | |
Wait states | JP28 |
0 wait states | pins 1 & 2 closed |
1 wait state | pins 2 & 3 closed |
BUS SPEED CONFIGURATION | |
CPU speed | JP29 |
<= 33MHz | pins 1 & 2 closed |
> 33MHz | pins 2 & 3 closed |