SOYO COMPUTER CO., LTD.
SY-25 J/K/L
|
Processor |
CX486S/80486SX/CX486DX/AM486DX/SL80486DX/AM486DX2/ 80486DX2/AM486DX4/80486DX4/P24D/P24T |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
None |
|
Maximum Onboard Memory |
128MB (EDO supported) |
|
Maximum Video Memory |
None |
|
Cache |
64/128/256KB |
|
BIOS |
Award |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (3), green PC connector |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J17 |
Turbo LED |
J22 |
|
Speaker |
J18 |
Green PC connector |
JP4 |
|
Reset switch |
J19 |
Green PC connector |
JP6 |
|
External battery |
J20 |
Green PC connector |
JP7 |
|
Turbo switch |
J21 |
32-bit VESA local bus slots |
SL1 – SL3 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
» |
Monitor type select monochrome |
JP3 |
Open |
|
Monitor type select color/EGA/VGA |
JP3 |
Closed | |
|
» |
CMOS memory normal operation |
JP5 |
Pins 1 & 2 closed |
|
CMOS memory clear |
JP5 |
Pins 2 & 3 closed | |
|
» |
Factory configured - do not alter |
JP17 |
Pins 1 & 2 closed |
|
» |
Factory configured - do not alter |
JP27 |
Pins 1 & 2 closed |
|
» |
Factory configured - do not alter |
JP32 |
Pins 1 & 2 closed |
|
» |
Factory configured - do not alter |
JP34 |
Unidentified |
|
SIMM CONFIGURATION 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 |
|
36MB |
(4) 1M x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
|
48MB |
(4) 4M x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
|
64MB |
(4) 16M x 9 |
None |
None |
|
65MB |
(4) 256K x 9 |
(1) 16M x 36 |
None |
|
68MB |
(4) 1M x 9 |
(1) 16M x 36 |
None |
|
72MB |
(4) 1M x 9 |
(1) 1M x 36 |
(1) 16M x 36 |
|
80MB |
(4) 4M x 9 |
(1) 16M x 36 |
None |
|
96MB |
(4) 4M x 9 |
(1) 4M x 36 |
(1) 16M x 36 |
|
128MB |
(4) 16M x 9 |
(1) 16M x 36 |
None |
|
SIMM CONFIGURATION 2 | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
1MB |
None |
(1) 256K x 36 |
None |
|
2MB |
None |
(1) 256K x 36 |
(1) 256K x 36 |
|
2MB |
None |
(1) 512K x 36 |
None |
|
4MB |
None |
(1) 512K x 36 |
(1) 512K x 36 |
|
4MB |
None |
(1) 1M x 36 |
None |
|
5MB |
None |
(1) 256K x 36 |
(1) 1M x 36 |
|
6MB |
(4) 1M x 9 |
(1) 256K x 36 |
(1) 256K x 36 |
|
6MB |
None |
(1) 512K x 36 |
(1) 1M x 36 |
|
8MB |
None |
(1) 1M x 36 |
(1) 1M x 36 |
|
8MB |
None |
(1) 2M x 36 |
None |
|
12MB |
(4) 1M x 9 |
(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 |
|
16MB |
None |
(1) 4M x 36 |
None |
|
17MB |
None |
(1) 256K x 36 |
(1) 4M x 36 |
|
18MB |
(4) 4M x 9 |
(1) 256K x 36 |
(1) 256K x 36 |
|
18MB |
None |
(1) 512K x 36 |
(1) 4M x 36 |
|
20MB |
None |
(1) 1M x 36 |
(1) 4M x 36 |
|
24MB |
(4) 4M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
|
32MB |
None |
(1) 4M x 36 |
(1) 4M x 36 |
|
32MB |
None |
(1) 8M x 36 |
None |
|
36MB |
(4) 4M x 9 |
(1) 1M x 36 |
(1) 4M x 36 |
|
36MB |
None |
(1) 1M x 36 |
(1) 8M x 36 |
|
48MB |
(4) 4M x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
|
48MB |
None |
(1) 4M x 36 |
(1) 8M x 36 |
|
64MB |
None |
(1) 8M x 36 |
(1) 8M x 36 |
|
65MB |
None |
(1) 256K x 36 |
(1) 16M x 36 |
|
68MB |
None |
(1) 1M x 36 |
(1) 16M x 36 |
|
72MB |
(4) 16M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
|
80MB |
None |
(1) 4M x 36 |
(1) 16M x 36 |
|
96MB |
(4) 16M x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
|
128MB |
None |
(1) 16M x 36 |
(1) 16M x 36 |
|
Note: Board also accepts x 32 SIMMs. | |||
|
SIMM JUMPER CONFIGURATION | |||
|
Configuration |
JP35 |
JP36 |
JP37 |
|
1 |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
2 |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
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 (A) |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 16K/32K x 8 |
|
256KB (B) |
(4) 64K x 8 |
None |
(1) 16K/32K x 8 |
|
CACHE JUMPER CONFIGURATION | |||
|
Size |
JP9 |
JP10 |
JP13 |
|
64KB |
Pins 2 & 3 closed |
Open |
Pins 1 & 2 closed |
|
128KB |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
|
256KB (A) |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
256KB (B) |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
CPU SPEED SELECTION | |||
|
Speed |
JP29 |
JP30 |
JP31 |
|
25MHz |
Closed |
Open |
Closed |
|
33MHz |
Open |
Closed |
Closed |
|
40MHz |
Closed |
Open |
Open |
|
50iMHz |
Closed |
Open |
Closed |
|
50MHz |
Open |
Closed |
Open |
|
66iMHz |
Open |
Closed |
Closed |
|
75iMHz |
Closed |
Open |
Closed |
|
80iMHz |
Closed |
Open |
Open |
|
100iMHz |
Open |
Closed |
Closed |
|
CPU TYPE SELECTION | |||||
|
Type |
JP1 |
JP2 |
JP11 |
JP12 |
JP14 |
|
CX 486S |
1 & 2 |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
|
80486SX |
2 & 3 |
1 & 2 |
3 & 4 |
2 & 3 |
2 & 3 |
|
CX 486DX |
1 & 2 |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
|
AM486DX |
2 & 3 |
1 & 2 |
3 & 4 |
2 & 3 |
3 & 4 |
|
SL80486DX |
2 & 3 |
1 & 2 |
3 & 4 |
2 & 3 |
3 & 4 |
|
AM486DX2 |
2 & 3 |
1 & 2 |
3 & 4 |
2 & 3 |
3 & 4 |
|
80486DX2 |
2 & 3 |
1 & 2 |
3 & 4 |
2 & 3 |
3 & 4 |
|
AM486DX4 |
2 & 3 |
1 & 2 |
3 & 4 |
2 & 3 |
3 & 4 |
|
80486DX4 |
2 & 3 |
1 & 2 |
3 & 4 |
2 & 3 |
3 & 4 |
|
80486DX4 (ODP) |
2 & 3 |
1 & 2 |
3 & 4 |
2 & 3 |
3 & 4 |
|
P24D |
1 & 2 |
1 & 2 |
1 & 2, 3 & 4 |
2 & 3 |
1 & 2, 3 & 4 |
|
P24T |
2 & 3 |
1 & 2 |
3 & 4 |
2 & 3 |
3 & 4 |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU TYPE SELECTION (CON’T) | ||||
|
Type |
JP15 |
JP16 |
JP18 |
JP19 |
|
CX 486S |
2 & 3 |
Open |
2 & 3 |
2 & 3 |
|
80486SX |
Open |
Open |
2 & 3 |
4 & 5 |
|
CX 486DX |
2 & 3 |
Open |
2 & 3 |
2 & 3 |
|
AM486DX |
2 & 3 |
Open |
2 & 3 |
4 & 5 |
|
SL80486DX |
2 & 3 |
Open |
2 & 3 |
4 & 5 |
|
AM486DX2 |
2 & 3 |
Open |
2 & 3 |
4 & 5 |
|
80486DX2 |
2 & 3 |
Open |
2 & 3 |
4 & 5 |
|
AM486DX4 |
2 & 3 |
Open |
2 & 3 |
4 & 5 |
|
80486DX4 |
2 & 3 |
Open |
2 & 3 |
4 & 5 |
|
80486DX4 (ODP) |
2 & 3 |
Open |
2 & 3 |
4 & 5 |
|
P24D |
2 & 3 |
Closed |
1 & 2 |
4 & 5 |
|
P24T |
1 & 2 |
Open |
2 & 3 |
1 & 2 |
|
Note: Pins designated should be in the closed position. | ||||
|
CPU TYPE SELECTION (CON’T) | ||||
|
Type |
JP20 |
JP21 |
JP22 |
JP23 |
|
CX 486S |
Open |
Open |
2 & 3 |
2 & 3 |
|
80486SX |
Open |
1 & 2 |
Open |
Open |
|
CX 486DX |
Open |
Open |
2 & 3 |
2 & 3 |
|
AM486DX |
Open |
1 & 2 |
Open |
Open |
|
SL80486DX |
Open |
1 & 2 |
Open |
Open |
|
AM486DX2 |
2 & 3 |
1 & 2 |
Open |
Open |
|
80486DX2 |
Open |
1 & 2 |
Open |
Open |
|
AM486DX4 |
1 & 2 |
1 & 2 |
Open |
Open |
|
80486DX4 |
Open |
1 & 2 |
Open |
Open |
|
80486DX4 (ODP) |
Open |
1 & 2 |
Open |
Open |
|
P24D |
1 & 2 |
2 & 3 |
1 & 2 |
Open |
|
P24T |
Open |
Open |
1 & 2 |
1 & 2 |
|
Note: Pins designated should be in the closed position. | ||||
|
CPU VOLTAGE SELECTION | |
|
Voltage |
JP24 |
|
3.45v |
Pins 3 & 5, 4 & 6 closed |
|
5v |
Pins 1 & 3, 2 & 4 closed |