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# CSS LABORATORIES, INC.
MB-4864
Processor 80486SX/SL80486SX/UMCU5/80486DX/SL80486DX/CXM7/
AM486DX2/AM486DX2+/80486DX2/SL80486DX2/SL80486DX4/
AM486DX5/P24D/CX M1SC/P24T
Processor 25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/
Speed 100(internal)/133(internal)MHz
Chip Set ALI
Video Chip None
Set
Maximum 128MB
Onboard
Memory
Maximum None
Video
Memory
Cache 128/256/512KB
BIOS AMI
Dimensions 254mm x 218mm
I/O 32-bit PCI slots (3), floppy drive interface, IDE interfaces
Options (2), parallel port, PS/2 mouse interface, serial ports (2)
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+------------------+-----------|
| Parallel port | J4 | Turbo LED | JP31 |
|------------------+----------+------------------+-----------|
| IDE interface 1 | J5 | Speaker | JP32 |
|------------------+----------+------------------+-----------|
| Floppy drive | J6 | Power LED & | JP33 |
| interface | | keylock | |
|------------------+----------+------------------+-----------|
| IDE interface 2 | J7 | Front panel | JP36 |
| | | connector | |
|------------------+----------+------------------+-----------|
| Serial port 2 | J8 | Reset switch | JP38/pins |
| | | | 1 & 2 |
|------------------+----------+------------------+-----------|
| Serial port 1 | J9 | Turbo LED | JP38/pins |
| | | | 3 & 4 |
|------------------+----------+------------------+-----------|
| External battery | JP1 | Auxiliary | JX1 |
| | | keyboard | |
| | | connector | |
|------------------+----------+------------------+-----------|
| IDE interface | JP27 | PS/2 mouse | JX2 |
| LED 2 | | interface | |
|------------------+----------+------------------+-----------|
| IDE interface | JP28 | 32-bit PCI slots | PC1 – PC3 |
| LED 1 | | | |
|------------------+----------+------------------+-----------|
| Turbo switch | JP30 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | JP14 | Unidentified |
| | alter (flash BIOS) | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP23 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | Internal RTC enabled | JP24 | Open |
|---+---------------------------------+-------+--------------|
| | Internal RTC disabled | JP24 | Closed |
|---+---------------------------------+-------+--------------|
| | Internal keyboard enabled | JP26 | Open |
|---+---------------------------------+-------+--------------|
| | Internal keyboard disabled | JP26 | Closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP29 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP35 | Unidentified |
| | alter (IDE master) | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP37 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 4MB | (1) 1M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 8MB | (1) 2M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 10MB | (1) 1M x 36 | (1) 1M x 36 | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 10MB | (1) 2M x 36 | (1) 512K x 36 | None |
|------------+---------------+---------------+---------------|
| 12MB | (1) 2M x 36 | (1) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 14MB | (1) 2M x 36 | (1) 1M x 36 | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (1) 4M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 20MB | (1) 4M x 36 | (1) 512K x 36 | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 22MB | (1) 4M x 36 | (1) 1M x 36 | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (1) 4M x 36 | (1) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 26MB | (1) 4M x 36 | (1) 2M x 36 | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 28MB | (1) 4M x 36 | (1) 2M x 36 | (1) 1M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|-----------+----------------+---------------+---------------|
| 32MB | (1) 8M x 36 | None | None |
|-----------+----------------+---------------+---------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | None |
|-----------+----------------+---------------+---------------|
| 34MB | (1) 8M x 36 | (1) 512K x 36 | None |
|-----------+----------------+---------------+---------------|
| 34MB | (1) 4M x 36 | (1) 4M x 36 | (1) 512K x 36 |
|-----------+----------------+---------------+---------------|
| 36MB | (1) 8M x 36 | (1) 512K x 36 | (1) 512K x 36 |
|-----------+----------------+---------------+---------------|
| 38MB | (1) 8M x 36 | (1) 512K x 36 | (1) 1M x 36 |
|-----------+----------------+---------------+---------------|
| 40MB | (1) 8M x 36 | (1) 2M x 36 | None |
|-----------+----------------+---------------+---------------|
| 40MB | (1) 8M x 36 | (1) 1M x 36 | (1) 1M x 36 |
|-----------+----------------+---------------+---------------|
| 42MB | (1) 8M x 36 | (1) 2M x 36 | (1) 512K x 36 |
|-----------+----------------+---------------+---------------|
| 44MB | (1) 8M x 36 | (1) 2M x 36 | (1) 1M x 36 |
|-----------+----------------+---------------+---------------|
| 48MB | (1) 8M x 36 | (1) 4M x 36 | None |
|-----------+----------------+---------------+---------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 |
|-----------+----------------+---------------+---------------|
| 48MB | (1) 8M x 36 | (1) 2M x 36 | (1) 2M x 36 |
|-----------+----------------+---------------+---------------|
| 50MB | (1) 8M x 36 | (1) 4M x 36 | (1) 512K x 36 |
|-----------+----------------+---------------+---------------|
| 52MB | (1) 8M x 36 | (1) 4M x 36 | (1) 1M x 36 |
|-----------+----------------+---------------+---------------|
| 56MB | (1) 8M x 36 | (1) 4M x 36 | (1) 2M x 36 |
|-----------+----------------+---------------+---------------|
| 64MB | (1) 8M x 36 | (1) 4M x 36 | (1) 4M x 36 |
|-----------+----------------+---------------+---------------|
| 64MB | (1) 16M x 36 | None | None |
|-----------+----------------+---------------+---------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 | None |
|-----------+----------------+---------------+---------------|
| 66MB | (1) 8M x 36 | (1) 8M x 36 | (1) 512K x 36 |
|-----------+----------------+---------------+---------------|
| 68MB | (1) 8M x 36 | (1) 8M x 36 | (1) 1M x 36 |
|-----------+----------------+---------------+---------------|
| 68MB | (1) 16M x 36 | (1) 1M x 36 | None |
|-----------+----------------+---------------+---------------|
| 70MB | (1) 16M x 36 | (1) 1M x 36 | (1) 512K x 36 |
|-----------+----------------+---------------+---------------|
| 72MB | (1) 16M x 36 | (1) 2M x 36 | None |
|-----------+----------------+---------------+---------------|
| 72MB | (1) 16M x 36 | (1) 1M x 36 | (1) 1M x 36 |
|-----------+----------------+---------------+---------------|
| 74MB | (1) 16M x 36 | (1) 2M x 36 | (1) 512K x 36 |
|-----------+----------------+---------------+---------------|
| 76MB | (1) 16M x 36 | (1) 2M x 36 | (1) 1M x 36 |
|-----------+----------------+---------------+---------------|
| 80MB | (1) 16M x 36 | (1) 4M x 36 | None |
|-----------+----------------+---------------+---------------|
| 80MB | (1) 16M x 36 | (1) 2M x 36 | (1) 2M x 36 |
|-----------+----------------+---------------+---------------|
| 82MB | (1) 16M x 36 | (1) 4M x 36 | (1) 512K x 36 |
|-----------+----------------+---------------+---------------|
| 84MB | (1) 16M x 36 | (1) 4M x 36 | (1) 1M x 36 |
|-----------+----------------+---------------+---------------|
| 88MB | (1) 16M x 36 | (1) 4M x 36 | (1) 2M x 36 |
|-----------+----------------+---------------+---------------|
| 96MB | (1) 16M x 36 | (1) 8M x 36 | None |
|-----------+----------------+---------------+---------------|
| 96MB | (1) 16M x 36 | (1) 4M x 36 | (1) 4M x 36 |
|-----------+----------------+---------------+---------------|
| 98MB | (1) 16M x 36 | (1) 8M x 36 | (1) 512K x 36 |
|-----------+----------------+---------------+---------------|
| 100MB | (1) 16M x 36 | (1) 8M x 36 | (1) 1M x 36 |
|-----------+----------------+---------------+---------------|
| 104MB | (1) 16M x 36 | (1) 8M x 36 | (1) 2M x 36 |
|-----------+----------------+---------------+---------------|
| 112MB | (1) 16M x 36 | (1) 8M x 36 | (1) 4M x 36 |
|-----------+----------------+---------------+---------------|
| 128MB | (1) 16M x 36 | (1) 16M x 36 | None |
|-----------+----------------+---------------+---------------|
| 128MB | (1) 16M x 36 | (1) 8M x 36 | (1) 8M x 36 |
|------------------------------------------------------------|
| Note: Board accepts x 32 SIMMs. 512KB x 32/36 is not |
| recommended. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|--------------+--------------------+------------------------|
| 128KB | (4) 32K x 8 | (1) 8K/16K/32K x 8 |
|--------------+--------------------+------------------------|
| 256KB | (4) 64K x 8 | (1) 16K/32K x 8 |
|--------------+--------------------+------------------------|
| 512KB | (4) 128K x 8 | (1) 32K x 8 |
|------------------------------------------------------------|
| Note: The location of bank 0 & the TAG is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP21 | JP22 |
|-------------------+--------------------+-------------------|
| 128KB | Open | Open |
|-------------------+--------------------+-------------------|
| 256KB | Open | Closed |
|-------------------+--------------------+-------------------|
| 512KB | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP15 | JP16 | JP17 | JP18 | JP25 |
|----------+----------+----------+----------+-------+--------|
| 25MHz | Closed | Open | Open | 1 & 2 | Open |
|----------+----------+----------+----------+-------+--------|
| 33MHz | Closed | Open | Closed | 1 & 2 | Open |
|----------+----------+----------+----------+-------+--------|
| 40MHz | Open | Closed | Closed | 2 & 3 | Closed |
|----------+----------+----------+----------+-------+--------|
| 50iMHz | Closed | Open | Open | 1 & 2 | Open |
|----------+----------+----------+----------+-------+--------|
| 66iMHz | Closed | Open | Closed | 1 & 2 | Open |
|----------+----------+----------+----------+-------+--------|
| 75iMHz | Closed | Open | Open | 1 & 2 | Open |
|----------+----------+----------+----------+-------+--------|
| 80iMHz | Open | Closed | Closed | 2 & 3 | Closed |
|----------+----------+----------+----------+-------+--------|
| 100iMHz | Closed | Open | Closed | 1 & 2 | Open |
|----------+----------+----------+----------+-------+--------|
| 133iMHz | Closed | Open | Closed | 1 & 2 | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP5 | JP6 | JP7 | JP8 | JP9 |
|---------------+---------+---------+--------+-------+-------|
| 80486SX | Open | Open | 1 & 2 | Open | Open |
|---------------+---------+---------+--------+-------+-------|
| SL80486SX | Closed | Open | 3 & 4 | 3 & 4 | 3 & 4 |
|---------------+---------+---------+--------+-------+-------|
| UMC U5 | Open | Open | 1 & 2 | 1 & 2 | 1 & 2 |
|---------------+---------+---------+--------+-------+-------|
| 80486DX | Open | Open | 1 & 2 | Open | Open |
|---------------+---------+---------+--------+-------+-------|
| SL80486DX | Closed | Open | 3 & 4 | 3 & 4 | 3 & 4 |
|---------------+---------+---------+--------+-------+-------|
| CX M7 | Closed | Open | 5 & 6 | 5 & 6 | 5 & 6 |
|---------------+---------+---------+--------+-------+-------|
| AM486DX2 | Open | Closed | 1 & 2 | Open | Open |
|---------------+---------+---------+--------+-------+-------|
| AM486DX2-66 | Open | Closed | 1 & 2 | Open | Open |
|---------------+---------+---------+--------+-------+-------|
| AM486DX2-80 | Open | Closed | 1 & 2 | Open | Open |
|---------------+---------+---------+--------+-------+-------|
| AM486DX2-100 | Open | Closed | 1 & 2 | Open | Open |
|---------------+---------+---------+--------+-------+-------|
| AM486DX2+-66 | Closed | Open | 3 & 4 | 3 & 4 | 3 & 4 |
|---------------+---------+---------+--------+-------+-------|
| AM486DX2+-80 | Closed | Open | 3 & 4 | 3 & 4 | 3 & 4 |
|---------------+---------+---------+--------+-------+-------|
| AM486DX2+-100 | Closed | Open | 3 & 4 | 3 & 4 | 3 & 4 |
|---------------+---------+---------+--------+-------+-------|
| 80486DX2 | Open | Open | 1 & 2 | Open | Open |
|---------------+---------+---------+--------+-------+-------|
| SL80486DX2 | Closed | Open | 3 & 4 | 3 & 4 | 3 & 4 |
|---------------+---------+---------+--------+-------+-------|
| SL80486DX4 | Closed | Open | 3 & 4 | 3 & 4 | 3 & 4 |
|---------------+---------+---------+--------+-------+-------|
| AM486DX5 | Open | Open | 1 & 2 | Open | Open |
|---------------+---------+---------+--------+-------+-------|
| P24D | Closed | Open | 3 & 4 | 3 & 4 | 3 & 4 |
|---------------+---------+---------+--------+-------+-------|
| CX M1SC | Closed | Open | 3 & 4 | 3 & 4 | 3 & 4 |
|---------------+---------+---------+--------+-------+-------|
| P24T | Closed | Open | 3 & 4 | 3 & 4 | 3 & 4 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP10 | JP11 | JP12 | JP13 | JP34 |
|---------------+------------+-------+-------+-------+-------|
| 80486SX | Open | 1 & 2 | 1 & 2 | Open | Open |
|---------------+------------+-------+-------+-------+-------|
| SL80486SX | Open | 1 & 2 | 1 & 2 | Open | Open |
|---------------+------------+-------+-------+-------+-------|
| UMC U5 | Open | 1 & 2 | 1 & 2 | Open | Open |
|---------------+------------+-------+-------+-------+-------|
| 80486DX | Open | 1 & 2 | 2 & 3 | 2 & 3 | Open |
|---------------+------------+-------+-------+-------+-------|
| SL80486DX | Open | 1 & 2 | 2 & 3 | 2 & 3 | Open |
|---------------+------------+-------+-------+-------+-------|
| CX M7 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 |
|---------------+------------+-------+-------+-------+-------|
| AM486DX2 | Open | 1 & 2 | 2 & 3 | 2 & 3 | Open |
|---------------+------------+-------+-------+-------+-------|
| AM486DX2-66 | Open | 1 & 2 | 2 & 3 | 2 & 3 | Open |
|---------------+------------+-------+-------+-------+-------|
| AM486DX2-80 | Open | 1 & 2 | 2 & 3 | 2 & 3 | Open |
|---------------+------------+-------+-------+-------+-------|
| AM486DX2-100 | Open | 1 & 2 | 2 & 3 | 2 & 3 | Open |
|---------------+------------+-------+-------+-------+-------|
| AM486DX2+-66 | 1 & 3, 5 & | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
| | 6 | | | | |
|---------------+------------+-------+-------+-------+-------|
| AM486DX2+-80 | 1 & 3, 5 & | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
| | 6 | | | | |
|---------------+------------+-------+-------+-------+-------|
| AM486DX2+-100 | 5 & 6 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------------+------------+-------+-------+-------+-------|
| 80486DX2 | Open | 1 & 2 | 2 & 3 | 2 & 3 | Open |
|---------------+------------+-------+-------+-------+-------|
| SL80486DX2 | Open | 1 & 2 | 2 & 3 | 2 & 3 | Open |
|---------------+------------+-------+-------+-------+-------|
| SL80486DX4 | Open | 1 & 2 | 2 & 3 | 2 & 3 | Open |
|---------------+------------+-------+-------+-------+-------|
| AM486DX5 | Open | 1 & 2 | 2 & 3 | 2 & 3 | Open |
|---------------+------------+-------+-------+-------+-------|
| P24D | 5 & 6 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------------+------------+-------+-------+-------+-------|
| CX M1SC | 5 & 6 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------------+------------+-------+-------+-------+-------|
| P24T | Open | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP2 | JP3 | JP4 |
|---------+----------------+----------------+----------------|
| 3.3v | Pins 2 & 3 | Pins 2 & 3 | Pins 7 & 8 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 3.45v | Pins 2 & 3 | Pins 2 & 3 | Pins 5 & 6 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 3.6v | Pins 2 & 3 | Pins 2 & 3 | Pins 3 & 4 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 4v | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 5v | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | JP19 | JP20 |
|------------------+--------------------+--------------------|
| » | 1 | Pins 2 & 3 closed | Pins 2 & 3 closed |
|----+-------------+--------------------+--------------------|
| | 3 | Pins 1 & 2 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+