ORCHID TECHNOLOGY
SUPERBOARD 486/VLB
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
20/25/33/50(internal)/50/66(internal)MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm 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 |
J23 |
32-bit VESA local bus slots |
S1 - S2 |
|
Speaker |
J24 |
Reset switch |
SW1 |
|
Turbo LED |
JP12 |
Turbo switch |
SW2 |
|
USER CONFIGURABLE SETTINGS |
|||
|
Function |
Jumper |
Position |
|
|
|
Monitor type select color |
JP1 |
Open |
|
|
Monitor type select monochrome |
JP1 |
Closed |
|
|
CMOS memory normal operation |
JP2 |
pins 2 & 3 closed |
|
|
CMOS memory clear |
JP2 |
pins 1 & 2 closed |
|
|
Factory configured - do not alter |
JP14 |
N/A |
|
|
Factory configured - do not alter (VESA host select 80486) |
JP15 |
Closed |
|
|
Factory configured - do not alter (VESA host select 80486) |
JP16 |
Open |
|
|
VESA high speed write wait state select one |
JP17 |
Closed |
|
|
VESA high speed write wait state select zero |
JP17 |
Open |
|
|
CPU speed select > 33MHz |
JP18 |
Closed |
|
|
CPU speed select £ 33MHz |
JP18 |
Open |
|
|
Factory configured - do not alter |
JP19 |
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 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CPU TYPE CONFIGURATION |
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|
Type |
Oscillator |
JP4 |
JP5 |
JP6 |
JP7 |
|
80486SX-20MHz |
20MHz |
1 & 2 |
Open |
2 & 3 |
Open |
|
80486SX-20MHz |
40MHz |
2 & 3 |
Open |
2 & 3 |
Open |
|
80486SX-25MHz |
25MHz |
1 & 2 |
Open |
2 & 3 |
Open |
|
80486SX-25MHz |
50MHz |
2 & 3 |
Open |
2 & 3 |
Open |
|
ODP486SX-25MHz |
25MHz |
1 & 2 |
Open |
2 & 3 |
Open |
|
ODP486SX-25MHz |
50MHz |
2 & 3 |
Open |
2 & 3 |
Open |
|
80486DX-25MHz |
25MHz |
1 & 2 |
2 & 3 |
1 & 2 |
Closed |
|
80486DX-33MHz |
66MHz |
2 & 3 |
2 & 3 |
1 & 2 |
Closed |
|
80486DX-50MHz |
50MHz |
1 & 2 |
2 & 3 |
1 & 2 |
Closed |
|
80486DX2-50MHz |
25MHz |
1 & 2 |
2 & 3 |
1 & 2 |
Closed |
|
80486DX2-50MHz |
50MHz |
2 & 3 |
2 & 3 |
1 & 2 |
Closed |
|
80486DX2-66MHz |
66MHz |
2 & 3 |
2 & 3 |
1 & 2 |
Closed |
|
Note: Pins designated should be in the closed position. |
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|
CACHE CONFIGURATION |
|
|
Size |
Bank 0 |
|
64KB |
(9) 8K x 8 |
|
256KB |
(9) 32K x 8 |
|
CACHE JUMPER CONFIGURATION |
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|
Size |
JP8 |
JP9 |
JP10 |
JP11 |
|
64KB |
Open |
Open |
Open |
Open |
|
256KB |
Closed |
Closed |
Open |
Closed |