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# ELITEGROUP COMPUTER SYSTEMS, INC.
UM4981 AIO
Processor CX486S/U5S/SL80486SX/80486SX/SL80486SX2/80486SX2/AM486DX/
AM486DXL/CX486DX/SL80486DX/80486DX/AM486DXL2/AM486DX2/
CX486DX2/SL80486DX2/80486DX2/P24D/80486DX4
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set UMC
Max. 64MB
Onboard
DRAM
Cache 64/128/256KB
BIOS Phoenix
Dimensions 330mm x 218mm
I/O 32-bit VESA local bus slots (2), floppy drive interface, green PC
Options connector, IDE interfaces (2), parallel port, serial ports (2)
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+----------+-----------------+----------|
| Parallel port | J1 | Power LED & | JP30 |
| | | keylock | |
|--------------------+----------+-----------------+----------|
| Serial port 1 | J2 | Speaker | JP31 |
|--------------------+----------+-----------------+----------|
| Serial port 2 | J3 | Reset switch | JP32 |
|--------------------+----------+-----------------+----------|
| Floppy drive | J4 | Turbo LED | JP33 |
| interface | | | |
|--------------------+----------+-----------------+----------|
| IDE interface | J5 | Turbo switch | JP34 |
| (primary) | | | |
|--------------------+----------+-----------------+----------|
| IDE interface | J6 | IDE interface | JP39 |
| (secondary) | | LED | |
|--------------------+----------+-----------------+----------|
| External battery | JP1 | 32-bit VESA | SL1 & |
| | | local bus slots | SL2 |
|--------------------+----------+-----------------+----------|
| Green PC connector | JP15 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Flash BIOS voltage select 5v | JP2 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Flash BIOS voltage select 12v | JP2 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | On board I/O enabled | JP3 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | On board I/O disabled | JP3 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Parallel port IRQ select IRQ7 | JP4 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Parallel port IRQ select IRQ5 | JP4 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP7 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Parallel port mode select normal | JP8 | Open |
| | mode | | |
|---+----------------------------------+--------+------------|
| | Parallel port mode select ECP | JP8 | Closed |
| | mode | | |
|---+----------------------------------+--------+------------|
| » | Primary IDE interface enabled | JP35 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Primary IDE interface disabled | JP35 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Secondary IDE interface enabled | JP36 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Secondary IDE interface disabled | JP36 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | NONE | NONE | (1) 512K x | 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 | NONE | NONE | (1) 512K x | (1) 512K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 1M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | NONE | NONE | NONE | (1) 2M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 13MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | NONE | NONE | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 4M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 21MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 22MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 25MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 37MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 49MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 52MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP22 | JP23 | JP24 | JP25 |
|-------+-----------------+----------------+--------+--------|
| 64KB | pins 2 & 3 | Open | Open | Open |
| | closed | | | |
|-------+-----------------+----------------+--------+--------|
| 128KB | pins 1 & 2 | pins 1 & 2 | Open | Closed |
| | closed | closed | | |
|-------+-----------------+----------------+--------+--------|
| 256KB | pins 2 & 3 | pins 2 & 3 | Closed | Closed |
| | closed | closed | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP16 | JP17 | JP18 |
|------------+---------------+---------------+---------------|
| CX486S | pins 2 & 3, 4 | pins 2 & 3, 4 | pins 1 & 2, 3 |
| | & 5 closed | & 5 closed | & 4, 5 & 6 |
| | | | closed |
|------------+---------------+---------------+---------------|
| U5S | Open | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed |
|------------+---------------+---------------+---------------|
| SL80486SX | pins 1 & 2, 3 | pins 5 & 6 | pins 1 & 2 |
| | & 4 closed | closed | closed |
|------------+---------------+---------------+---------------|
| 80486SX | Open | Open | pins 2 & 3 |
| | | | closed |
|------------+---------------+---------------+---------------|
| SL80486SX2 | pins 1 & 2, 3 | pins 5 & 6 | pins 1 & 2 |
| | & 4 closed | closed | closed |
|------------+---------------+---------------+---------------|
| 80486SX2 | Open | Open | pins 2 & 3 |
| | | | closed |
|------------+---------------+---------------+---------------|
| AM486DX | Open | Open | pins 2 & 3 |
| | | | closed |
|------------+---------------+---------------+---------------|
| AM486DXL | Open | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed |
|------------+---------------+---------------+---------------|
| CX486DX | pins 2 & 3 | pins 2 & 3, 4 | pins 1 & 2, 3 |
| | closed | & 5 closed | & 4, 5 & 6 |
| | | | closed |
|------------+---------------+---------------+---------------|
| SL80486DX | pins 1 & 2, 3 | pins 5 & 6 | pins 1 & 2 |
| | & 4 closed | closed | closed |
|------------+---------------+---------------+---------------|
| 80486DX | Open | Open | pins 2 & 3 |
| | | | closed |
|------------+---------------+---------------+---------------|
| AM486DX2 | Open | Open | pins 2 & 3 |
| | | | closed |
|------------+---------------+---------------+---------------|
| AM486DXL2 | Open | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed |
|------------+---------------+---------------+---------------|
| CX486DX2 | pins 2 & 3 | pins 2 & 3, 4 | pins 1 & 2, 3 |
| | closed | & 5 closed | & 4, 5 & 6 |
| | | | closed |
|------------+---------------+---------------+---------------|
| SL80486DX2 | pins 1 & 2, 3 | pins 5 & 6 | pins 1 & 2 |
| | & 4 closed | closed | closed |
|------------+---------------+---------------+---------------|
| 80486DX2 | Open | Open | pins 2 & 3 |
| | | | closed |
|------------+---------------+---------------+---------------|
| P24D | pins 1 & 2, 3 | pins 3 & 4, 5 | pins 1 & 2, 4 |
| | & 4 closed | & 6 closed | & 5 closed |
|------------+---------------+---------------+---------------|
| 80486DX4 | pins 1 & 2, 3 | pins 5 & 6 | pins 1 & 2 |
| | & 4 closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP19 | JP20 | JP21 |
|------------+---------------+---------------+---------------|
| CX486S | pins 1 & 2, 3 | Open | pins 2 & 3 |
| | & 4 closed | | closed |
|------------+---------------+---------------+---------------|
| U5S | pins 2 & 3 | pins 3 & 4 | pins 2 & 3 |
| | closed | closed | closed |
|------------+---------------+---------------+---------------|
| SL80486SX | pins 1 & 2 | Open | pins 2 & 3 |
| | closed | | closed |
|------------+---------------+---------------+---------------|
| 80486SX | Open | Open | pins 2 & 3 |
| | | | closed |
|------------+---------------+---------------+---------------|
| SL80486SX2 | pins 1 & 2 | Open | pins 2 & 3 |
| | closed | | closed |
|------------+---------------+---------------+---------------|
| 80486SX2 | Open | Open | pins 2 & 3 |
| | | | closed |
|------------+---------------+---------------+---------------|
| AM486DX | Open | pins 1 & 2 | pins 1 & 2, 3 |
| | | closed | & 4 closed |
|------------+---------------+---------------+---------------|
| AM486DXL | pins 2 & 3 | pins 1 & 2, 3 | pins 1 & 2, 3 |
| | closed | & 4 closed | & 4 closed |
|------------+---------------+---------------+---------------|
| CX486DX | pins 1 & 2, 3 | pins 1 & 2 | pins 1 & 2, 3 |
| | & 4 closed | closed | & 4 closed |
|------------+---------------+---------------+---------------|
| SL80486DX | pins 1 & 2 | pins 1 & 2 | pins 1 & 2, 3 |
| | closed | closed | & 4 closed |
|------------+---------------+---------------+---------------|
| 80486DX | Open | pins 1 & 2 | pins 1 & 2, 3 |
| | | closed | & 4 closed |
|------------+---------------+---------------+---------------|
| AM486DX2 | Open | pins 1 & 2 | pins 1 & 2, 3 |
| | | closed | & 4 closed |
|------------+---------------+---------------+---------------|
| AM486DXL2 | pins 2 & 3 | pins 1 & 2, 3 | pins 1 & 2, 3 |
| | closed | & 4 closed | & 4 closed |
|------------+---------------+---------------+---------------|
| CX486DX2 | pins 1 & 2, 3 | pins 1 & 2 | pins 1 & 2, 3 |
| | & 4 closed | closed | & 4 closed |
|------------+---------------+---------------+---------------|
| SL80486DX2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2, 3 |
| | closed | closed | & 4 closed |
|------------+---------------+---------------+---------------|
| 80486DX2 | Open | pins 1 & 2 | pins 1 & 2, 3 |
| | | closed | & 4 closed |
|------------+---------------+---------------+---------------|
| P24D | pins 1 & 2, 4 | pins 1 & 2 | pins 1 & 2, 3 |
| | & 5 closed | closed | & 4 closed |
|------------+---------------+---------------+---------------|
| 80486DX4 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2, 3 |
| | closed | closed | & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP9 | JP10 | JP11 |
|---------------+--------------+--------------+--------------|
| 25MHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 40MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 50iMHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50MHz | Closed | Open | Open |
|---------------+--------------+--------------+--------------|
| 66iMHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 75iMHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 100iMHz | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION (80486DX4 ONLY) |
|------------------------------------------------------------|
| Speed | JP29 |
|----------------------------+-------------------------------|
| 2x | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 3x | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP26 |
|---------------------------------------+--------------------|
| 3.3v (from on board regulator) | pins 3 & 4 closed |
|---------------------------------------+--------------------|
| 3.3v (from special power supply unit) | pins 5 & 6 closed |
|---------------------------------------+--------------------|
| 5v (from standard power supply unit | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait states | JP27 |
|-------------------------------+----------------------------|
| 0 wait states | Open |
|-------------------------------+----------------------------|
| 1 wait state | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP28 |
|-------------------------------+----------------------------|
| <= 33MHz | Open |
|-------------------------------+----------------------------|
| > 33MHz | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ECP MODE CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP5 | JP6 |
|------------------+--------------------+--------------------|
| DRQ1/DACK 1 | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| DRQ3/DACK 3 | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HARD DRIVE TIMING CONFIGURATION |
|------------------------------------------------------------|
| Active | Cycle | Speed | HDD capacity | JP37 | JP38 |
| time | time | | | | |
|--------+-------+-------+-------------------+-------+-------|
| 15T | 30T | 1 | 40/50MHz | 2 & 3 | 2 & 3 |
|--------+-------+-------+-------------------+-------+-------|
| 15T | 19T | 2 | 25/33MHz | 1 & 2 | 2 & 3 |
|--------+-------+-------+-------------------+-------+-------|
| 9T | 13T | 3 | <20mhz/enhanced | 2 & 3 | 1 & 2 |
| | | | IDE | | |
|--------+-------+-------+-------------------+-------+-------|
| 18T | 37T | 0 | <40mhz/non ATA | 1 & 2 | 1 & 2 |
| | | | support | | |
+------------------------------------------------------------+