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# EFA CORPORATION
486U-PIO
Processor CX486SX/UMC486SX/80486SX/SL80486SX/CX486SX2/UMC486SX2/
80486SX2/SL80486SX2/CX486DX/UMC486DX/AM486DX/(SL)AM486DX/
80486DX/SL80486DX/CX486DX2/UMC486DX2/AM486DX2/(SL)AM486DX2/
80486DX2/SL80486DX2/P24D/AM486DX4/(SL)AM486DX4/80486DX4/ Pentium
Overdrive/CXM1
Processor 25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/100(internal)/
Speed 120(internal)MHz
Chip Set UMC
Max. 128MB
Onboard
DRAM
Cache 128/256/512/1024KB
BIOS Award
Dimensions 280mm x 220mm
I/O 32-bit PCI slots (3), floppy drive interface, IDE interfaces (2), parallel
Options port, serial ports (2)
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Floppy drive | J1 | Power LED & | J8 |
| interface | | keylock | |
|-------------------+----------+------------------+----------|
| Parallel port | J2 | Speaker | J9 |
|-------------------+----------+------------------+----------|
| Serial port 1 | J3 | External battery | J10 |
|-------------------+----------+------------------+----------|
| Serial port 2 | J4 | Reset switch | J12 |
|-------------------+----------+------------------+----------|
| IDE interface 2 | J5 | Turbo switch | J13 |
|-------------------+----------+------------------+----------|
| IDE interface 1 | J6 | Turbo LED | J14 |
|-------------------+----------+------------------+----------|
| IDE interface LED | J7 | 32-bit PCI slots | PC1 - |
| | | | PC3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | CMOS memory normal operation | JP1 | Open |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | JP1 | Closed |
|---+--------------------------------+--------+--------------|
| » | Monitor type select color | JP2 | Closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select monochrome | JP2 | Open |
|---+--------------------------------+--------+--------------|
| » | Flash BIOS voltage select 5v | JP3 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | Flash BIOS voltage select 12v | JP3 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | PS/2 mouse IRQ12 enabled | JP4 | Closed |
|---+--------------------------------+--------+--------------|
| | PS/2 mouse IRQ12 disabled | JP4 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (1) 256K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 512K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 512K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 1M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 512K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | (1) 512K x | (1) 512K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | (1) 1M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 512K x | (1) 512K x | (1) 512K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 512K x | (1) 1M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 256K x | (1) 512K x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 512K x | (1) 512K x | NONE |
| | | 36 | 36 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 512K x | (1) 512K x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 2M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 256K x | (1) 1M x 36 | (1) 1M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 256K x | (1) 2M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 2M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 2M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 1M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 512K x | (1) 1M x 36 | (1) 1M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 512K x | (1) 2M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 11MB | (1) 2M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 2M x 36 | (1) 512K x | (1) 512K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 2M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 13MB | (1) 256K x | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 14MB | (1) 2M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 14MB | (1) 512K x | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 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 |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 4M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 256K x | (1) 2M x 36 | (1) 2M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 256K x | (1) 4M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 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 | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 512K x | (1) 4M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 512K x | (1) 512K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 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 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 25MB | (1) 256K x | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 26MB | (1) 512K x | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | 36 | | 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 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 1M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 8M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 256K x | (1) 4M x 36 | (1) 4M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 256K x | (1) 8M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 8M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 8M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 512K x | (1) 4M x 36 | (1) 4M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 512K x | (1) 8M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 35MB | (1) 8M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 8M x 36 | (1) 512K x | (1) 512K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 8M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 38MB | (1) 8M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 8M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 8M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 2M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 2M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 44MB | (1) 8M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 8M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 8M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 49MB | (1) 256K x | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 50MB | (1) 512K x | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 52MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 56MB | (1) 8M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 56MB | (1) 2M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 65MB | (1) 256K x | (1) 8M x 36 | (1) 8M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 66MB | (1) 512K x | (1) 8M x 36 | (1) 8M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 8M x 36 | (1) 8M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 72MB | (1) 2M x 36 | (1) 8M x 36 | (1) 8M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 80MB | (1) 8M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 8M x 36 | (1) 8M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x 36 | (1) 8M x | NONE |
| | | | 36 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 97MB | (1) 256K x | (1) 8M x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 98MB | (1) 512K x | (1) 8M x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 100MB | (1) 1M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 104MB | (1) 2M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 112MB | (1) 4M 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 | TAG |
|-----------+--------------+--------------+------------------|
| 128KB | (4) 32K x 8 | NONE | (1) 32K x 8 |
|-----------+--------------+--------------+------------------|
| 256KB (A) | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|-----------+--------------+--------------+------------------|
| 256KB (B) | (4) 64K x 8 | NONE | (1) 32K x 8 |
|-----------+--------------+--------------+------------------|
| 512KB (A) | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 |
|-----------+--------------+--------------+------------------|
| 512KB (B) | (4) 128K x 8 | NONE | (1) 32K x 8 |
|-----------+--------------+--------------+------------------|
| 1MB | (4) 128K x 8 | (4) 128K x 8 | (1) 64K or (1) |
| | | | 128K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP12 | JP13 | JP14 |
|-----------+----------------+---------------+---------------|
| 128KB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (A) | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (B) | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 512KB (A) | pins 2 & 3 | pins 2 & 3 | pins 4 & 5 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 512KB (B) | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 1MB | pins 2 & 3 | pins 2 & 3 | pins 5 & 6 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP15 | JP16 | JP17 | JP18 | JP19 |
|-------------+-------+-------+-------+-------+--------------|
| CX486SX | 1 & 2 | Open | 2 & 3 | 1 & 2 | 2 & 3, 4 & 5 |
|-------------+-------+-------+-------+-------+--------------|
| UMC486SX | Open | Open | 1 & 2 | 2 & 3 | Open |
|-------------+-------+-------+-------+-------+--------------|
| 80486SX | Open | Open | 1 & 2 | 1 & 2 | Open |
|-------------+-------+-------+-------+-------+--------------|
| SL80486SX | Open | Open | 1 & 2 | 1 & 2 | 3 & 4, 5 & 6 |
|-------------+-------+-------+-------+-------+--------------|
| CX486SX2 | 1 & 2 | Open | 2 & 3 | 1 & 2 | 2 & 3, 4 & 5 |
|-------------+-------+-------+-------+-------+--------------|
| UMC486SX2 | Open | Open | 1 & 2 | 2 & 3 | Open |
|-------------+-------+-------+-------+-------+--------------|
| 80486SX2 | Open | Open | 1 & 2 | 1 & 2 | Open |
|-------------+-------+-------+-------+-------+--------------|
| SL80486SX2 | Open | Open | 1 & 2 | 1 & 2 | 3 & 4, 5 & 6 |
|-------------+-------+-------+-------+-------+--------------|
| CX486DX | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3, 4 & 5 |
|-------------+-------+-------+-------+-------+--------------|
| UMC486DX | Open | 1 & 2 | 1 & 2 | 2 & 3 | Open |
|-------------+-------+-------+-------+-------+--------------|
| AM486DX | Open | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|-------------+-------+-------+-------+-------+--------------|
| (SL)AM486DX | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 3 & 4, 5 & 6 |
|-------------+-------+-------+-------+-------+--------------|
| 80486DX | Open | 1 & 2 | 1 & 2 | 1 & 2 | Open |
|-------------+-------+-------+-------+-------+--------------|
| SL80486DX | Open | 1 & 2 | 1 & 2 | 1 & 2 | 3 & 4, 5 & 6 |
|-------------+-------+-------+-------+-------+--------------|
| CX486DX2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3, 4 & 5 |
|-------------+-------+-------+-------+-------+--------------|
| UMC486DX2 | Open | 1 & 2 | 1 & 2 | 2 & 3 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP15 | JP16 | JP17 | JP18 | JP19 |
|--------------+-------+----------+-------+-------+----------|
| AM486DX2 | Open | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|--------------+-------+----------+-------+-------+----------|
| (SL)AM486DX2 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 3 & 4, 5 |
| | | | | | & 6 |
|--------------+-------+----------+-------+-------+----------|
| 80486DX2 | Open | 1 & 2 | 1 & 2 | 1 & 2 | Open |
|--------------+-------+----------+-------+-------+----------|
| SL80486DX2 | Open | 1 & 2 | 1 & 2 | 1 & 2 | 3 & 4, 5 |
| | | | | | & 6 |
|--------------+-------+----------+-------+-------+----------|
| P24D | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 3 & 4, 5 |
| | | | | | & 6 |
|--------------+-------+----------+-------+-------+----------|
| AM486DX4 | Open | 1 & 2 | 1 & 2 | 2 & 3 | Open |
|--------------+-------+----------+-------+-------+----------|
| (SL)AM486DX4 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 3 & 4, 5 |
| | | | | | & 6 |
|--------------+-------+----------+-------+-------+----------|
| 80486DX4 | Open | 1 & 2 | 1 & 2 | 1 & 2 | 3 & 4, 5 |
| | | | | | & 6 |
|--------------+-------+----------+-------+-------+----------|
| P24T | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 3 & 4, 5 |
| | | | | | & 6 |
|--------------+-------+----------+-------+-------+----------|
| CXM1 | 2 & 3 | 1 & 2, 3 | 1 & 2 | 1 & 2 | 3 & 4, 5 |
| | | & 4 | | | & 6 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP22 | JP23 | JP24 | JP25 |
|--------------+-----------------+------------+-------+------|
| CX486SX | 2 & 3, 4 & 5 | 2 & 3 | 1 & 2 | Open |
|--------------+-----------------+------------+-------+------|
| UMC486SX | Open | 2 & 3 | 2 & 3 | Open |
|--------------+-----------------+------------+-------+------|
| 80486SX | Open | 2 & 3 | 2 & 3 | Open |
|--------------+-----------------+------------+-------+------|
| SL80486SX | 5 & 6 | 2 & 3 | 1 & 2 | Open |
|--------------+-----------------+------------+-------+------|
| CX486SX2 | 2 & 3, 4 & 5 | 2 & 3 | 1 & 2 | Open |
|--------------+-----------------+------------+-------+------|
| UMC486SX2 | Open | 2 & 3 | 2 & 3 | Open |
|--------------+-----------------+------------+-------+------|
| 80486SX2 | Open | 2 & 3 | 2 & 3 | Open |
|--------------+-----------------+------------+-------+------|
| SL80486SX2 | 5 & 6 | 2 & 3 | 1 & 2 | Open |
|--------------+-----------------+------------+-------+------|
| CX486DX | 2 & 3, 4 & 5 | 1 & 2, 3 & | 1 & 2 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| UMC486DX | Open | 1 & 2, 3 & | 2 & 3 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| AM486DX | Open | 1 & 2, 3 & | 2 & 3 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| (SL)AM486DX | 1 & 2, 3 & 4, 5 | 1 & 2, 3 & | 1 & 2 | Open |
| | & 6 | 4 | | |
|--------------+-----------------+------------+-------+------|
| 80486DX | Open | 1 & 2, 3 & | 2 & 3 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| SL80486DX | 5 & 6 | 1 & 2, 3 & | 1 & 2 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| CX486DX2 | 2 & 3, 4 & 5 | 1 & 2, 3 & | 1 & 2 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| UMC486DX2 | Open | 1 & 2, 3 & | 2 & 3 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| AM486DX2 | Open | 1 & 2, 3 & | 2 & 3 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| (SL)AM486DX2 | 1 & 2, 3 & 4, 5 | 1 & 2, 3 & | 1 & 2 | Open |
| | & 6 | 4 | | |
|--------------+-----------------+------------+-------+------|
| 80486DX2 | Open | 1 & 2, 3 & | 2 & 3 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| SL80486DX2 | 5 & 6 | 1 & 2, 3 & | 1 & 2 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| P24D | 3 & 4, 5 & 6 | 1 & 2, 3 & | 1 & 2 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| AM486DX4 | Open | 1 & 2, 3 & | 2 & 3 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| (SL)AM486DX4 | 3 & 4, 5 & 6 | 1 & 2, 3 & | 1 & 2 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| 80486DX4 | 5 & 6 | 1 & 2, 3 & | 1 & 2 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| P24T | 5 & 6 | 1 & 2, 3 & | 1 & 2 | Open |
| | | 4 | | |
|--------------+-----------------+------------+-------+------|
| CXM1 | 3 & 4, 5 & 6 | 1 & 2, 3 & | 1 & 2 | Open |
| | | 4 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP9 | JP10 | JP11 |
|---------+----------------+----------------+----------------|
| 25MHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 33MHz | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 40MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 50iMHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 66iMHz | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 75iMHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 80iMHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 100iMHz | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 120iMHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP20 | JP21 |
|-----------+---------------------------+--------------------|
| 3.3v | pins 2 & 3, 4 & 5 closed | pins 1 & 2 closed |
|-----------+---------------------------+--------------------|
| 3.45v | pins 2 & 3, 4 & 5 closed | pins 2 & 3 closed |
|-----------+---------------------------+--------------------|
| 3.8v | pins 2 & 3, 4 & 5 closed | pins 4 & 5 closed |
|-----------+---------------------------+--------------------|
| 4v | pins 2 & 3, 4 & 5 closed | pins 5 & 6 closed |
|-----------+---------------------------+--------------------|
| 5v | pins 1 & 2 , 5 & 6 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CONFIGURATION |
|------------------------------------------------------------|
| » DMA | JP5 | JP6 |
|------------------+--------------------+--------------------|
| » | DMA 3 | pins 2 & 3 closed | pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| » | DMA 5 | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+