UNIDENTIFIED
486-VL BUS ANTI-VIRUS
|
Processor |
80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
OPTi |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
32-Bit VESA local bus slots (2) |
|
NPU Options |
None |
|
CONNECTIONS |
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|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J1 |
Turbo switch |
JP28 |
|
Power LED & keylock |
J5 |
32-bit VESA Local bus slot |
S1 |
|
Speaker |
J6 |
32-bit VESA Local bus slot |
S2 |
|
Turbo LED |
JP24 |
Reset switch |
SW1 |
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USER CONFIGURABLE SETTINGS |
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|
Function |
Jumper |
Position |
|
|
|
Monitor type select color |
JP1 |
Closed |
|
|
Monitor type select monochrome |
JP1 |
Open |
|
|
Factory configured - do not alter |
JP32 |
pins 2 & 3 closed |
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|
ADS # signal delay enabled |
JP40 |
pins 2 & 3 closed |
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|
ADS # signal delay disabled |
JP40 |
pins 1 & 2 closed |
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DRAM CONFIGURATION |
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|
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 |
|
5MB |
(4) 256K x 9 |
(4) 1M x 9 |
|
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 |
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CACHE CONFIGURATION |
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|
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) 16K x 8/(1) 32K x 8 |
|
Note:The exact locations of Bank 0 and Bank 1 are unknown. |
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CACHE JUMPER CONFIGURATION |
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|
Size |
JP7 |
JP9 |
JP15 |
JP22 |
|
64KB |
pins 2 & 3 closed |
Open |
Open |
Open |
|
128KB |
pins 1 & 2 closed |
Closed |
Closed |
Open |
|
256KB |
pins 2 & 3 closed |
Closed |
Closed |
Closed |
|
Note:The exact locations of Bank 0 and Bank 1 are unknown. |
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CPU TYPE CONFIGURATION |
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|
Type |
JP11 |
JP12 |
|
80486SX |
Open |
pins 2 & 3 closed |
|
80487SX |
pins 2 & 3 closed |
pins 1 & 2 and 3 & 4 closed |
|
80486DX |
pins 1 & 2 closed |
pins 1 & 2 and 3 & 4 closed |
|
80486DX2 |
pins 1 & 2 closed |
pins 1 & 2 and 3 & 4 closed |
|
Pentium Overdrive |
pins 2 & 3 closed |
pins 1 & 2 and 3 & 4 closed |
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CPU SPEED CONFIGURATION |
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|
Speed |
JP10 |
JP16 |
JP23 |
|
25MHz |
Open |
pins 2 & 3 closed |
Closed |
|
33MHz |
Closed |
pins 2 & 3 closed |
Open |
|
40MHz |
Open |
pins 2 & 3 closed |
Open |
|
50i MHz |
Open |
pins 2 & 3 closed |
Closed |
|
50MHz |
Open |
pins 1 & 2 closed |
Closed |
|
66i MHz |
Closed |
pins 2 & 3 closed |
Open |
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VESA WAIT STATE/BUS SPEED CONFIGURATION |
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|
CPU speed |
Wait states |
J20 |
J21 |
|
< 33MHz |
0 wait states |
Closed |
Closed |
|
> 33MHz |
1 wait state |
Open |
Open |
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VL-BUS MASTER/SLAVE CONFIGURATION |
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|
Setting |
JP13 |
JP18 |
|
|
|
Slave mode |
Closed |
Open |
|
|
Master & slave |
Closed |
Open |
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Note:For VL-Bus device to support both master and slave mode, an additional PAL must be inserted in U43 |
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VL-BUS SETUP MODE CONFIGURATION |
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|
Setting |
JP29 |
JP39 |
|
|
|
Setup 0 |
pins 1 & 2 closed |
pins 1 & 2 closed |
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|
Setup 1 |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
|
Setup 2 |
pins 2 & 3 closed |
pins 2 & 3 closed |