UNIDENTIFIED
786 ACIO VESA (VER. 2)
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Device Type |
Mainboard |
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Processor |
80386DX/CX486DLC/80486SX/80486DX/80486DX2 |
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Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
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Chip Set |
Unidentified |
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Max. Onboard DRAM |
32MB |
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Cache |
64/128/256KB |
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BIOS |
Unidentified |
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Dimensions |
254mm x 218mm |
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I/O Options |
32-bit VESA local bus slots (2) |
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NPU Options |
80387DX |
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CONNECTIONS |
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Purpose |
Location |
Purpose |
Location |
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Power LED & keylock |
J2 |
External battery |
J7 |
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Turbo switch |
J4 |
Speaker |
J100 |
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Turbo LED |
J5 |
32-bit VESA Local bus slot |
S1 |
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Reset switch |
J6 |
32-bit VESA Local bus slot |
S2 |
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USER CONFIGURABLE SETTINGS |
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Function |
Jumper |
Position |
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Monitor type select color |
J3 |
Closed |
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Monitor type select monochrome |
J3 |
Open |
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CMOS memory normal operation (Internal battery) |
JMP3 |
Pins 2 & 3 closed |
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CMOS memory normal operation (External battery) |
JMP3 |
Pins 1 & 2 closed |
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CMOS memory clear |
JMP3 |
Pins 2 & 4 closed |
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NPU enabled |
JMP4 |
Pins 2 & 3 closed |
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NPU disabled |
JMP4 |
Pins 1 & 2 closed |
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Factory configured - do not alter |
JMP7 |
Closed |
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Factory configured - do not alter |
JMP13 |
Pins 1 & 2 closed |
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VESA BUS SELECTION |
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Function |
JMP6 |
JMP14 |
JMP15 |
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466-50MHz VESA local bus enabled |
Open |
1 & 2 |
1 & 2 |
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All other VESA local busses enabled |
Closed |
2 & 3 |
2 & 3 |
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Note: Pins designated should be in the closed position. |
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DRAM CONFIGURATION |
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Size |
Bank 0 |
Bank 1 |
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1MB |
(4) 256K x 9 |
None |
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2MB |
(4) 256K x 9 |
(4) 256K x 9 |
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4MB |
(4) 1M x 9 |
None |
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5MB |
(4) 1M x 9 |
(4) 256K x 9 |
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8MB |
(4) 1M x 9 |
(4) 1M x 9 |
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16MB |
(4) 4M x 9 |
None |
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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/U26 |
TAG/U27 |
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64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
(1) 8K x 8 |
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128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
(1) 8K x 8 |
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256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
(1) 32K x 8 |
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CACHE JUMPER CONFIGURATION |
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Size |
JMP1A |
JMP1B |
JMP1C |
JMP8 |
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64KB |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2, 4 & 5 |
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128KB |
2 & 3 |
1 & 2 |
2 & 3 |
2 & 3, 4 & 5 |
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256KB |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3, 5 & 6 |
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Note:Pins designated should be in the closed position. |
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CPU TYPE CONFIGURATION |
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Type |
JMP2 |
JMP5 |
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80386DX |
2 & 3 |
Closed |
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CX486DLC |
Open |
Open |
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80486SX |
1 & 2 |
Open |
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80486DX |
2 & 3 |
Open |
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80486DX2 |
2 & 3 |
Open |
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Note:Pins designated should be in the closed position. |
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CPU SPEED CONFIGURATION |
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Speed |
JMP9 |
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80386DX/25MHz |
Pins 1 & 5 and 2 & 6 closed |
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80386DX/33MHz |
Pins 1 & 5 and 4 & 8 closed |
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80386DX/40MHz |
Pins 1 & 5, 3 & 7 and 4 & 8 closed |
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CX486DLC-33 |
Pins 1 & 5 and 4 & 8 closed |
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CX486DLC-40 |
Pins 1 & 5, 3 & 7 and 4 & 8 closed |
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80486SX-33 |
Pins 4 & 8 closed |
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80486DX/50MHz |
Pins 3 & 7 closed |
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80486DX/25MHz |
Pins 2 & 6 closed |
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80486DX/33MHz |
Pins 4 & 8 closed |
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80486DX2/50i MHz |
Pins 2 & 6 closed |
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80486DX2/66i MHz |
Pins 4 & 8 closed |