TEXT View Source
# 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
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------+----------+------------------------+----------|
| Power LED & | J23 | 32-bit VESA local bus | S1 - S2 |
| keylock | | slots | |
|-------------+----------+------------------------+----------|
| 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 | JP14 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP15 | Closed |
| | alter (VESA host select 80486) | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP16 | Open |
| | alter (VESA host select 80486) | | |
|---+----------------------------------+--------+------------|
| » | VESA high speed write wait state | JP17 | Closed |
| | select one | | |
|---+----------------------------------+--------+------------|
| | VESA high speed write wait state | JP17 | Open |
| | select zero | | |
|---+----------------------------------+--------+------------|
| » | CPU speed select > 33MHz | JP18 | Closed |
|---+----------------------------------+--------+------------|
| | CPU speed select £ 33MHz | JP18 | Open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP19 | Closed |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------------------------------------------------|
| Type | Oscillator | JP4 | JP5 | JP6 | JP7 |
|----------------+------------+------+-------+------+--------|
| 80486SX-20MHz | 20MHz | 1 & | Open | 2 & | Open |
| | | 2 | | 3 | |
|----------------+------------+------+-------+------+--------|
| 80486SX-20MHz | 40MHz | 2 & | Open | 2 & | Open |
| | | 3 | | 3 | |
|----------------+------------+------+-------+------+--------|
| 80486SX-25MHz | 25MHz | 1 & | Open | 2 & | Open |
| | | 2 | | 3 | |
|----------------+------------+------+-------+------+--------|
| 80486SX-25MHz | 50MHz | 2 & | Open | 2 & | Open |
| | | 3 | | 3 | |
|----------------+------------+------+-------+------+--------|
| ODP486SX-25MHz | 25MHz | 1 & | Open | 2 & | Open |
| | | 2 | | 3 | |
|----------------+------------+------+-------+------+--------|
| ODP486SX-25MHz | 50MHz | 2 & | Open | 2 & | Open |
| | | 3 | | 3 | |
|----------------+------------+------+-------+------+--------|
| 80486DX-25MHz | 25MHz | 1 & | 2 & 3 | 1 & | Closed |
| | | 2 | | 2 | |
|----------------+------------+------+-------+------+--------|
| 80486DX-33MHz | 66MHz | 2 & | 2 & 3 | 1 & | Closed |
| | | 3 | | 2 | |
|----------------+------------+------+-------+------+--------|
| 80486DX-50MHz | 50MHz | 1 & | 2 & 3 | 1 & | Closed |
| | | 2 | | 2 | |
|----------------+------------+------+-------+------+--------|
| 80486DX2-50MHz | 25MHz | 1 & | 2 & 3 | 1 & | Closed |
| | | 2 | | 2 | |
|----------------+------------+------+-------+------+--------|
| 80486DX2-50MHz | 50MHz | 2 & | 2 & 3 | 1 & | Closed |
| | | 3 | | 2 | |
|----------------+------------+------+-------+------+--------|
| 80486DX2-66MHz | 66MHz | 2 & | 2 & 3 | 1 & | Closed |
| | | 3 | | 2 | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 64KB | (9) 8K x 8 |
|----------------------------+-------------------------------|
| 256KB | (9) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP8 | JP9 | JP10 | JP11 |
|-----------+------------+------------+----------+-----------|
| 64KB | Open | Open | Open | Open |
|-----------+------------+------------+----------+-----------|
| 256KB | Closed | Closed | Open | Closed |
+------------------------------------------------------------+