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# CSS LABORATORIES, INC.
PREFERRED 462 PCI/VL ESP, MB-4862
Processor 80486SX/80487SX/CX486M7/80486DX/80486DX2/80486DX4/ Pentium
Overdrive
Processor 8/16/25/33/40/50(internal)/50/66(internal)100(internal)MHz
Speed
Chip Set OPTI
Max. 128MB
Onboard
DRAM
Cache 64/128/256KB
BIOS Award
Dimensions 330mm x 218mm
I/O 32-bit VESA local bus slots (2), 32-bit PCI slots (3)
Options
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+-----------+--------------------+-----------|
| Power LED & | JP17 | Turbo switch | JP48 pins |
| keylock | | | 3 & 4 |
|---------------+-----------+--------------------+-----------|
| IDE interface | JP45 | External battery | JP49 |
| LED | | | |
|---------------+-----------+--------------------+-----------|
| Speaker | JP46 | 32-bit PCI slots | PC1 - PC3 |
|---------------+-----------+--------------------+-----------|
| Front panel | JP47 | 32-bit VESA local | SL1 & SL2 |
| connector | | bus slots | |
|---------------+-----------+--------------------+-----------|
| Reset switch | JP48 pins | | |
| | 1 & 2 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | J10 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP7 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Local bus type select | JP9 | pins 1 & 2 |
| | synchronous | | closed |
|---+----------------------------------+--------+------------|
| | Local bus type select | JP9 | pins 2 & 3 |
| | asynchronous | | closed |
|---+----------------------------------+--------+------------|
| | PCI bus type select synchronous | JP11 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | PCI bus type select asynchronous | JP11 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP12 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP13 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP19 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP20 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP23 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP26 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP27 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP40 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP90 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP1106 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP1108 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP1109 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP1111 | N/A |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (1) 256K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 512K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 512K x | (1) 512K x | (1) 512K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 512K x | (1) 512K x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON'T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 16M x | NONE | NONE | NONE |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 16M x | (1) 16M x | NONE | NONE |
| | 36 | 36 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------+-------------+-------------+------------------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 or (1) 32K |
| | | | x 8 |
|-------+-------------+-------------+------------------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|-------+-------------+-------------+------------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|------------------------------------------------------------|
| Note: The orientation of Bank 0 & 1 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | jp24 | jp29 | JP32 | JP33 |
|-------+--------+--------+-----------------+----------------|
| 64KB | Open | Open | pins 2 & 3 | pins 2 & 3 |
| | | | closed | closed |
|-------+--------+--------+-----------------+----------------|
| 128KB | Open | Closed | pins 1 & 2 | pins 1 & 2 |
| | | | closed | closed |
|-------+--------+--------+-----------------+----------------|
| 256KB | Closed | Closed | pins 2 & 3 | pins 2 & 3 |
| | | | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP17 | JP28 | JP34 | JP37 | JP38 | JP39 |
|----------+--------+--------+-------+-------+-------+-------|
| 80486SX | N/A | Open | Open | N/A | N/A | 1 & 2 |
|----------+--------+--------+-------+-------+-------+-------|
| 80487SX | N/A | Open | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 |
|----------+--------+--------+-------+-------+-------+-------|
| CX486M7 | N/A | Closed | 2 & 3 | N/A | 2 & 3 | 2 & 3 |
|----------+--------+--------+-------+-------+-------+-------|
| 80486DX | Closed | Open | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 |
|----------+--------+--------+-------+-------+-------+-------|
| 80486DX2 | Closed | Open | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 |
|----------+--------+--------+-------+-------+-------+-------|
| 80486DX4 | Closed | Open | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 |
|----------+--------+--------+-------+-------+-------+-------|
| P24T | N/A | Open | N/A | N/A | N/A | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON'T) |
|------------------------------------------------------------|
| Type | JP41 | JP43 | JP44 | JP1101 | JP1102 |
|----------+--------+-------+--------------+--------+--------|
| 80486SX | N/A | N/A | 2 & 3 | Closed | Closed |
|----------+--------+-------+--------------+--------+--------|
| 80487SX | N/A | N/A | 1 & 2, 3 & 4 | Closed | Closed |
|----------+--------+-------+--------------+--------+--------|
| CX486M7 | N/A | 2 & 4 | N/A | Open | Open |
|----------+--------+-------+--------------+--------+--------|
| 80486DX | Closed | N/A | 1 & 2, 3 & 4 | Closed | Closed |
|----------+--------+-------+--------------+--------+--------|
| 80486DX2 | Closed | N/A | 1 & 2, 3 & 4 | Closed | Closed |
|----------+--------+-------+--------------+--------+--------|
| 80486DX4 | Closed | N/A | 1 & 2, 3 & 4 | Open | Open |
|----------+--------+-------+--------------+--------+--------|
| P24T | N/A | N/A | N/A | Closed | Closed |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP35 |
|--------------------------+---------------------------------|
| 8MHz | Open |
|--------------------------+---------------------------------|
| 16MHz | pins 3 & 4 closed |
|--------------------------+---------------------------------|
| 25MHz | pins 1 & 2 closed |
|--------------------------+---------------------------------|
| 33MHz | pins 1 & 2, 5 & 6 closed |
|--------------------------+---------------------------------|
| 40MHz | pins 1 & 2, 3 & 4 closed |
|--------------------------+---------------------------------|
| 50iMHz | pins 1 & 2 closed |
|--------------------------+---------------------------------|
| 50MHz | pins 1 & 2, 3 & 4, 5 & 6 closed |
|--------------------------+---------------------------------|
| 66iMHz | pins 1 & 2, 5 & 6 closed |
|--------------------------+---------------------------------|
| 100iMHz | pins 1 & 2, 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION (CYRIX ONLY) |
|------------------------------------------------------------|
| Setting | JP1110 |
|-------------------------------+----------------------------|
| Internal clock doubled | Closed |
|-------------------------------+----------------------------|
| Internal clock standard | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait states | JP21 |
|-------------------------------+----------------------------|
| 0 wait states | Open |
|-------------------------------+----------------------------|
| 1 wait state | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP22 | JP31 |
|------------------+--------------------+--------------------|
| <= 33MHz | Open | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| > 33MHz | pins 1 & 2 closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLASH BIOS CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP16 | JP1107 |
|------------------+--------------------+--------------------|
| » | Disabled | pins 2 & 3 closed | pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| » | Enabled | pins 1 & 2 closed | pins 2 & 3 closed |
+------------------------------------------------------------+