SOYO COMPUTER CO., LTD.
486 VESA
|
Processor |
80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
SIS |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
230mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (2) |
|
NPU Options |
None |
|
CONNECTIONS |
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|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J17 |
Turbo switch |
J21 |
|
Speaker |
J18 |
Turbo LED |
J22 |
|
Reset switch |
J19 |
32-bit VESA Local bus slots |
SL1 & SL2 |
|
External battery |
J20 |
|
|
|
USER CONFIGURABLE SETTINGS |
|||
|
Function |
Jumper |
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 |
JP6 |
pins 2 & 3 closed |
|
DRAM CONFIGURATION |
||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(4) 256K x 9 |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
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 |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION |
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|
Size |
JP14 |
JP15 |
JP21 |
|
64KB |
pins 1 & 2 closed |
Open |
pins 2 & 3 closed |
|
128KB |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
256KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
CPU TYPE CONFIGURATION |
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|
Type |
JP8 |
JP9 |
JP12 |
JP13 |
|
80486SX (PQFP) |
Open |
Open |
Open |
pins 2 & 3 closed |
|
80486SX (PGA) |
Open |
Closed |
Open |
pins 2 & 3 closed |
|
80487SX |
Closed |
Closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
80846DX/DX2 |
Closed |
Closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
Overdrive |
Closed |
Closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
CPU SPEED CONFIGURATION |
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|
Speed |
JP16 |
JP17 |
JP18 |
|
25MHz |
Closed |
Open |
Closed |
|
33MHz |
Open |
Closed |
Closed |
|
40MHz |
Closed |
Open |
Open |
|
50iMHz |
Closed |
Open |
Closed |
|
50MHz |
Open |
Closed |
Open |
|
66iMHz |
Open |
Closed |
Closed |
|
VESA WAIT STATE/BUS SPEED CONFIGURATION |
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|
CPU speed |
Wait states |
JP19 |
JP20 |
|
£ 33MHz |
0 wait states |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
> 33MHz |
1 wait state |
pins 2 & 3 closed |
pins 2 & 3 closed |