ORCHID TECHNOLOGY
SUPERBOARD 486/VLB (VERSION 2)
|
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 |
128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit VESA card slots (2) |
|
NPU Options |
None |
|
CONNECTIONS |
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|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
JP8 |
32-bit VESA cards |
S1 & S2 |
|
Speaker |
JP7 |
Reset switch |
JP9 |
|
Turbo LED |
JP3 |
Turbo switch |
JP10 |
|
USER CONFIGURABLE SETTINGS |
|||
|
Function |
Jumper |
Position |
|
|
|
Monitor type select color |
JP26 |
Closed |
|
|
Monitor type select monochrome |
JP26 |
Open |
|
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 |
|
CACHE CONFIGURATION |
|||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 32K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION |
|||
|
Size |
JP14 |
JP16 |
JP22 |
|
128KB |
pins 2 & 3 closed |
Open |
pins 2 & 3 closed |
|
256KB |
pins 1 & 2 closed |
Closed |
pins 1 & 2 closed |
|
CPU TYPE CONFIGURATION |
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|
CPU Type |
Oscillator |
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 & 2 |
Open |
Open |
pins 2 & 3 |
|
80486SX - 25MHz |
50MHz |
pins 2 & 3 |
Open |
Open |
pins 1 & 2 |
|
80486DX - 25MHz |
25MHz |
pins 1 & 2 |
Closed |
pins 2 & 3 |
pins 2 & 3 |
|
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 - 25MHz |
25MHz |
pins 2 & 3 |
Open |
Open |
pins 2 & 3 |
|
ODP486SX - 25MHz |
50MHz |
pins 2 & 3 |
Open |
pins 2 & 3 |
Open |
|
80486DX2 - 50MHz |
25MHz |
pins 1 & 2 |
Closed |
pins 2 & 3 |
pins 2 & 3 |
|
80486DX2 - 50MHz |
50MHz |
pins 1 & 2 |
Closed |
pins 2 & 3 |
pins 1 & 2 |
|
80486DX2 - 66MHz |
66MHz |
pins 1 & 2 |
Closed |
pins 2 & 3 |
pins 1 & 2 |
|
VESA CPU TYPE (ID0 & ID1) CONFIGURATION |
||
|
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 |
||
|
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 |