ORCHID TECHNOLOGY
SUPERBOARD 486/VLB (Rev. C)
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
20/25/33/50(internal)/50/66(internal)MHz |
|
Chip Set |
EFAR |
|
Max. Onboard DRAM |
32MB |
|
SRAM Cache |
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 |
|
Turbo LED |
JP3 |
Reset switch |
JP9 |
|
Speaker |
JP7 |
Turbo switch |
JP10 |
|
Power LED & keylock |
JP8 |
32-bit Vesa local bus slots |
S1 & S2 |
|
USER CONFIGURABLE SETTINGS |
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|
Function |
Jumper |
Position |
|
|
|
Factory configured - do not alter |
JP11 |
Open |
|
|
Monitor type select color |
JP26 |
Open |
|
|
Monitor type select monochrome |
JP27 |
Closed |
|
|
Factory configured - do not alter |
JP27 |
pins 2 & 3 closed |
|
|
Factory configured - do not alter |
JP28 |
pins 2 & 3 closed |
|
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 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CACHE CONFIGURATION |
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|
Size |
Cache |
Location |
TAG |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 32K x 8 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION |
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|
Size |
JP14 |
JP16 |
JP22 |
|
128KB |
pins 2 & 3 closed |
Open |
pins 2 & 3 closed |
|
256KB |
pins 1 & 2 closed |
Closed |
pins 1 & 2 closed |
|
VESA CPU TYPE (ID0 & ID1) CONFIGURATION |
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|
CPU Type |
JP1 (ID0) |
JP2 (ID1) |
|
80386 |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
80486 |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
VESA WAIT STATE (ID2) CONFIGURATION |
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|
Wait states |
CPU speed |
JP4 (ID2) |
|
0 wait states |
£ 33MHz |
pins 1 & 2 closed |
|
1 wait state |
> 33MHz |
pins 2 & 3 closed |
|
VESA BUS SPEED (ID3) CONFIGURATION |
|
|
CPU speed |
JP5 (ID3) |
|
£ 33MHz |
pins 1 & 2 closed |
|
> 33MHz |
pins 2 & 3 closed |
|
VESA ID4 CONFIGURATION |
|
|
Setting |
JP6 (ID4) |
|
Reserved for future use |
pins 2 & 3 closed |
|
CPU TYPE CONFIGURATION |
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|
Type |
Speed |
OSC |
JP12 |
JP13 |
JP18 |
JP19 |
|
80486SX |
20MHz |
20MHz |
pins 2 & 3 |
Open |
Open |
pins 2 & 3 |
|
80486SX |
20MHz |
40MHz |
pins 2 & 3 |
Open |
Open |
pins 1 & 2 |
|
80486SX |
25MHz |
25MHz |
pins 2 & 3 |
Open |
Open |
pins 2 & 3 |
|
80486SX |
25MHz |
50MHz |
pins 2 & 3 |
Open |
Open |
pins 1 & 2 |
|
80487SX |
25MHz |
25MHz |
pins 1 & 2 |
Closed |
pins 2 & 3 |
pins 2 & 3 |
|
80487SX |
25MHz |
50MHz |
pins 1 & 2 |
Closed |
pins 2 & 3 |
pins 1 & 2 |
|
80487SX |
33MHz |
66MHz |
pins 1 & 2 |
Closed |
pins 2 & 3 |
pins 1 & 2 |
|
80486DX |
25MHz |
25MHz |
pins 1 & 2 |
Closed |
pins 2 & 3 |
pins 2 & 3 |
|
80486DX |
25MHz |
50MHz |
pins 1 & 2 |
Closed |
pins 2 & 3 |
pins 1 & 2 |
|
80486DX |
33MHz |
66MHz |
pins 1 & 2 |
Closed |
pins 2 & 3 |
pins 1 & 2 |
|
80486DX |
50MHz |
50MHz |
pins 1 & 2 |
Closed |
pins 2 & 3 |
pins 2 & 3 |
|
ODP486SX |
50MHz |
25MHz |
pins 2 & 3 |
Open |
Open |
pins 2 & 3 |
|
ODP486SX |
50iMHz |
50MHz |
pins 2 & 3 |
Open |
Open |
pins 1 & 2 |
|
80486DX2 |
50iMHz |
50MHz |
pins 1 & 2 |
Closed |
pins 2 & 3 |
pins 1 & 2 |
|
80486DX2 |
66iMHz |
66MHz |
pins 1 & 2 |
Closed |
pins 2 & 3 |
pins 1 & 2 |
|
Notes: Pins designated should be in the closed position. |
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