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 | |||
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 | |||||
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 |