(TXT) View Source
# I-BUS
BARRACUDA
Processor CX486SX/80486SX/80486SX2/CX486DX/AM486DX/SL80486DX/80486DX/
CX486DX2/AM486DX2/SL80486DX2/80486DX2/80486DX4/P24D/Pentium
Overdrive
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set OPTI
Max. 128MB
Onboard
DRAM
Cache 64/128/256/512KB
BIOS Unidentified
Dimensions 300mm x 89mm
I/O Floppy drive interface, IDE interface, parallel port, PS/2 mouse
Options port, serial ports (2)
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| IDE interface | J3 | Serial port 1 | J30 |
|-------------------+----------+------------------+----------|
| Parallel port | J4 | Serial port 2 | J31 |
|-------------------+----------+------------------+----------|
| Speaker | J6 | Auxiliary | J32 |
| | | keyboard | |
| | | connector | |
|-------------------+----------+------------------+----------|
| Chassis fan power | J8 | Floppy drive | J33 |
| | | interface | |
|-------------------+----------+------------------+----------|
| IDE interface LED | J25 | PS/2 mouse | J35 |
| | | interface | |
|-------------------+----------+------------------+----------|
| Reset switch | J26 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| | PCI type select synchronous | J9 | pins 2 & 4, |
| | | | 3 & 5 closed |
|---+--------------------------------+--------+--------------|
| | PCI type select asynchronous | J9 | pins 1 & 3, |
| | | | 4 & 6 closed |
|---+--------------------------------+--------+--------------|
| » | Primary IDE enabled | J14 | pins 1 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | Primary IDE disabled | J14 | pins 1 & 3 |
| | | | open |
|---+--------------------------------+--------+--------------|
| | Secondary IDE enabled | J14 | pins 3 & 5 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | Secondary IDE disabled | J14 | pins 3 & 5 |
| | | | open |
|---+--------------------------------+--------+--------------|
| » | IDE interface enabled | J14 | pins 2 & 4 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | IDE interface disabled | J14 | pins 4 & 6 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Floppy drive type select | J17 | pins 1 & 2 |
| | 1.44MB | | closed |
|---+--------------------------------+--------+--------------|
| | Floppy drive type select | J17 | pins 3 & 4, |
| | 2.88MB | | 5 & 6 closed |
|---+--------------------------------+--------+--------------|
| » | CPU clock frequency select | J19 | pins 1 & 2 |
| | 8MHz | | closed |
|---+--------------------------------+--------+--------------|
| | CPU clock frequency select | J19 | pins 2 & 3 |
| | 16MHz (DX4 only) | | closed |
|---+--------------------------------+--------+--------------|
| | PCI adapters not installed | J20 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | PCI adapters installed | J20 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | IDE read prefetch enabled | J22 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | IDE read prefetch disabled | J22 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Battery type select internal | J24 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | J24 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Mouse IRQ12 enabled | J27 | Closed |
|---+--------------------------------+--------+--------------|
| | Mouse IRQ12 disabled | J27 | Open |
|---+--------------------------------+--------+--------------|
| » | IDE IRQ14 enabled | J28 | Closed |
|---+--------------------------------+--------+--------------|
| | IDE IRQ14 disabled | J28 | Open |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | J29 | N/A |
| | alter | | |
|---+--------------------------------+--------+--------------|
| | Password enabled | J36 | Closed |
|---+--------------------------------+--------+--------------|
| | Password disabled | J36 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 512K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 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 |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 2M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 512K x | (1) 2M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 14MB | (1) 2M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 512K x | (1) 2M x 36 | (1) 2M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 4M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 22MB | (1) 4M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 1M x | (1) 1M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 26MB | (1) 512K x | (1) 2M x | (1) 2M x | (1) 2M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 34MB | (1) 8M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 34MB | (1) 512K x | (1) 8M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 38MB | (1) 8M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 8M x 36 | (1) 2M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 2M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 8M x 36 | (1) 2M x | (1) 2M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 52MB | (1) 1M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 66MB | (1) 512K x | (1) 8M x | (1) 8M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 2M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 98MB | (1) 512K x | (1) 8M x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 104MB | (1) 2M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|---------------+-----------------------+--------------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 |
|---------------+-----------------------+--------------------|
| 128KB | (4) 32K x 8 | NONE |
|---------------+-----------------------+--------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 |
|---------------+-----------------------+--------------------|
| 512KB | (4) 64K x 8 | (4) 64K x 8 |
|------------------------------------------------------------|
| Note: Cache is factory installed by the manufacturer and |
| is not configurable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J15 |
|--------------------------+---------------------------------|
| 64KB | Open |
|--------------------------+---------------------------------|
| 128KB | pins 5 & 6 closed |
|--------------------------+---------------------------------|
| 256KB | pins 3 & 4, 5 & 6 closed |
|--------------------------+---------------------------------|
| 512KB | pins 1 & 2, 3 & 4, 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Setting | J21 |
|-------------------------------+----------------------------|
| Bank 0 installed | pins 1 & 2 closed |
|-------------------------------+----------------------------|
| Banks 0 & 1 installed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J5 |
|----------------------------+-------------------------------|
| 80486SX | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 80486DX | pins 1 & 2, 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J7 | J23 |
|------------+--------------------------+--------------------|
| AMD | Open | pins 1 & 2 closed |
|------------+--------------------------+--------------------|
| Cyrix | pins 1 & 2, 3 & 4 closed | pins 2 & 3 closed |
|------------+--------------------------+--------------------|
| Intel | Open | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J1 |
|----------------------------+-------------------------------|
| 80486SL-series | pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| P24T burst write | pins 5 & 6 closed |
|----------------------------+-------------------------------|
| P24T write back | pins 7 & 8 closed |
|----------------------------+-------------------------------|
| P24T write through | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J18 |
|------------------------------+-----------------------------|
| 80486SL-series | pins 2 & 4 closed |
|------------------------------+-----------------------------|
| Cyrix | pins 4 & 6 closed |
|------------------------------+-----------------------------|
| P24D write back | pins 3 & 5 closed |
|------------------------------+-----------------------------|
| P24D write through | pins 1 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J11 |
|----------------------------------------+-------------------|
| Any CPU type installed except for P24T | pins 1 & 3 closed |
|----------------------------------------+-------------------|
| Pentium Overdrive | pins 3 & 5 closed |
|----------------------------------------+-------------------|
| Bit 0 to stop clock | pins 2 & 4 closed |
|----------------------------------------+-------------------|
| Bit 0 to stop clock | pins 4 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | J12 | J16 |
|---------+-------------------+------------------------------|
| 25MHz | pins 1 & 3, 2 & 4 | pins 5 & 6 closed |
| | closed | |
|---------+-------------------+------------------------------|
| 33MHz | pins 1 & 3, 4 & 6 | pins 1 & 2, 5 & 6 closed |
| | closed | |
|---------+-------------------+------------------------------|
| 40MHz | pins 2 & 4, 3 & 5 | pins 3 & 4, 5 & 6 closed |
| | closed | |
|---------+-------------------+------------------------------|
| 50iMHz | pins 1 & 3, 2 & 4 | pins 5 & 6 closed |
| | closed | |
|---------+-------------------+------------------------------|
| 50MHz | pins 4 & 6, 3 & 5 | pins 1 & 2, 3 & 4, 5 & 6 |
| | closed | closed |
|---------+-------------------+------------------------------|
| 66iMHz | pins 1 & 3, 4 & 6 | pins 1 & 2, 5 & 6 closed |
| | closed | |
|---------+-------------------+------------------------------|
| 75iMHz | pins 1 & 3, 2 & 4 | pins 5 & 6 closed |
| | closed | |
|---------+-------------------+------------------------------|
| 100iMHz | pins 1 & 3, 4 & 6 | pins 1 & 2, 5 & 6 closed |
| | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION (80486DX4) |
|------------------------------------------------------------|
| Speed | J10 |
|-------------------------------+----------------------------|
| 2x | pins 3 & 5 closed |
|-------------------------------+----------------------------|
| 2.5x | pins 1 & 3 closed |
|-------------------------------+----------------------------|
| 3x | Open |
|-------------------------------+----------------------------|
| Cyrix CPU installed | pins 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| IDE MODE CONFIGURATION |
|------------------------------------------------------------|
| Speed | J13 |
|----------------------------+-------------------------------|
| >180ns | pins 1 & 3, 2 & 4 closed |
|----------------------------+-------------------------------|
| >240ns | pins 2 & 4, 3 & 5 closed |
|----------------------------+-------------------------------|
| >383ns | pins 1 & 3, 4 & 6 closed |
|----------------------------+-------------------------------|
| >480ns | pins 3 & 5, 4 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CONFIGURATION |
|------------------------------------------------------------|
| DMA | J2 |
|----------------------------+-------------------------------|
| DMA 1 | pins 3 & 4, 5 & 6 closed |
|----------------------------+-------------------------------|
| DMA 3 | pins 1 & 2, 7 & 8 closed |
+------------------------------------------------------------+