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# SHUTTLE COMPUTER INTERNATIONAL, INC.
HOT-555A
Device Type Mainboard
Processor CX 6X86/IBM 6X86/CX 6X86L/IBM 6X86L/AM
K5/Pentium
Processor Speed 75/90/100/120/125/133/150/166/180/200MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 128MB (EDO & SDRAM supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS Award
Dimensions 230mm x 220mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse interface, serial
ports (2), IR connector, USB connectors (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Floppy drive | CN1 | Power LED & | J14 |
| interface | | keylock | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN2 | PS/2 mouse | J99 |
| | | interface | |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN3 | Chassis fan | JP1 |
| | | power | |
|-------------------+----------+------------------+----------|
| Parallel port | CN4 | IR connector | JP3 |
|-------------------+----------+------------------+----------|
| IDE interface 1 | J6 | Reset switch | JP12 |
|-------------------+----------+------------------+----------|
| IDE interface 2 | J7 | Green PC | JP15 |
| | | connector | |
|-------------------+----------+------------------+----------|
| USB connector | J10 | Green PC LED | JP17 |
|-------------------+----------+------------------+----------|
| USB connector | J11 | IDE interface | JP22 |
| | | LED | |
|-------------------+----------+------------------+----------|
| Speaker | J12 | 32-bit PCI slots | PC1 – |
| | | | PC4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-----------------------------------+-------+----------------|
| | Flash BIOS voltage select 12v | JP18 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Flash BIOS voltage select 5v | JP18 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | CMOS memory normal operation | JP45 | Closed |
|---+-------------------------------+-------+----------------|
| | CMOS memory clear | JP45 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 36 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 36 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4M x 36 | None |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8M x 36 | None |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 2 | Bank 3 |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 64 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 2M x 64 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 1M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 24MB | (1) 2M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 32MB | (1) 4M x 64 | None |
|------------------+--------------------+--------------------|
| 32MB | (1) 2M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 40MB | (1) 4M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 48MB | (1) 4M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 64MB | (1) 8M x 64 | None |
|------------------+--------------------+--------------------|
| 64MB | (1) 4M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 72MB | (1) 8M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 80MB | (1) 8M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 96MB | (1) 8M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 128MB | (1) 8M x 64 | (1) 8M x 64 |
|------------------------------------------------------------|
| Note: Board accepts SDRAM memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 256KB | (2) 32K x 32 |
|----------------------------+-------------------------------|
| 512KB | (2) 64K x 32 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JPA | JPB | JP37 |
| speed | speed | | | | |
|---------+--------+------------+-------+-------+------------|
| 120MHz | 50MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4, 5 & 6 |
|---------+--------+------------+-------+-------+------------|
| 133MHz | 55MHz | 2x | 1 & 2 | 2 & 3 | 3 & 4, 5 & |
| | | | | | 6 |
|---------+--------+------------+-------+-------+------------|
| 150MHz | 60MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4 |
|---------+--------+------------+-------+-------+------------|
| 166MHz | 66MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 5 & |
| | | | | | 6 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JPA | JPB | JP37 |
| speed | speed | | | | |
|---------+--------+------------+-------+-------+------------|
| 120MHz | 50MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4, 5 & 6 |
|---------+--------+------------+-------+-------+------------|
| 133MHz | 55MHz | 2x | 1 & 2 | 2 & 3 | 3 & 4, 5 & |
| | | | | | 6 |
|---------+--------+------------+-------+-------+------------|
| 150MHz | 60MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4 |
|---------+--------+------------+-------+-------+------------|
| 166MHz | 66MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 5 & |
| | | | | | 6 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86L) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JPA | JPB | JP37 |
| speed | speed | | | | |
|---------+--------+------------+-------+-------+------------|
| 120MHz | 50MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4, 5 & 6 |
|---------+--------+------------+-------+-------+------------|
| 133MHz | 55MHz | 2x | 1 & 2 | 2 & 3 | 3 & 4, 5 & |
| | | | | | 6 |
|---------+--------+------------+-------+-------+------------|
| 150MHz | 60MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4 |
|---------+--------+------------+-------+-------+------------|
| 166MHz | 66MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 5 & |
| | | | | | 6 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86L) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JPA | JPB | JP37 |
| speed | speed | | | | |
|---------+--------+------------+-------+-------+------------|
| 120MHz | 50MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4, 5 & 6 |
|---------+--------+------------+-------+-------+------------|
| 133MHz | 55MHz | 2x | 1 & 2 | 2 & 3 | 3 & 4, 5 & |
| | | | | | 6 |
|---------+--------+------------+-------+-------+------------|
| 150MHz | 60MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4 |
|---------+--------+------------+-------+-------+------------|
| 166MHz | 66MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 5 & |
| | | | | | 6 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JPA | JPB | JP37 |
| speed | speed | | | | |
|---------+--------+------------+-------+-------+------------|
| 75MHz | 50MHz | 1.5x | 2 & 3 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4, 5 & 6 |
|---------+--------+------------+-------+-------+------------|
| 90MHz | 60MHz | 1.5x | 2 & 3 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4 |
|---------+--------+------------+-------+-------+------------|
| 100MHz | 66MHz | 1.5x | 2 & 3 | 2 & 3 | 1 & 2, 5 & |
| | | | | | 6 |
|---------+--------+------------+-------+-------+------------|
| 120MHz | 60MHz | 1.5x | 2 & 3 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4 |
|---------+--------+------------+-------+-------+------------|
| 133MHz | 66MHz | 1.5x | 2 & 3 | 2 & 3 | 1 & 2, 5 & |
| | | | | | 6 |
|---------+--------+------------+-------+-------+------------|
| 150MHz | 60MHz | 1.75x | 1 & 2 | 1 & 2 | 1 & 2, 3 & |
| | | | | | 4 |
|---------+--------+------------+-------+-------+------------|
| 166MHz | 66MHz | 1.75x | 1 & 2 | 1 & 2 | 1 & 2, 5 & |
| | | | | | 6 |
|---------+--------+------------+-------+-------+------------|
| 200MHz | 66MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 5 & |
| | | | | | 6 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JPA | JPB | JP37 |
| speed | speed | | | | |
|---------+--------+------------+-------+-------+------------|
| 75MHz | 50MHz | 1.5x | 2 & 3 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4, 5 & 6 |
|---------+--------+------------+-------+-------+------------|
| 90MHz | 60MHz | 1.5x | 2 & 3 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4 |
|---------+--------+------------+-------+-------+------------|
| 100MHz | 66MHz | 1.5x | 2 & 3 | 2 & 3 | 1 & 2, 5 & |
| | | | | | 6 |
|---------+--------+------------+-------+-------+------------|
| 120MHz | 60MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 3 & |
| | | | | | 4 |
|---------+--------+------------+-------+-------+------------|
| 125MHz | 50MHz | 2.5x | 1 & 2 | 1 & 2 | 1 & 2, 3 & |
| | | | | | 4, 5 & 6 |
|---------+--------+------------+-------+-------+------------|
| 133MHz | 66MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2, 5 & |
| | | | | | 6 |
|---------+--------+------------+-------+-------+------------|
| 150MHz | 60MHz | 2.5x | 1 & 2 | 1 & 2 | 1 & 2, 3 & |
| | | | | | 4 |
|---------+--------+------------+-------+-------+------------|
| 166MHz | 66MHz | 2.5x | 1 & 2 | 1 & 2 | 1 & 2, 5 & |
| | | | | | 6 |
|---------+--------+------------+-------+-------+------------|
| 180MHz | 60MHz | 3x | 2 & 3 | 1 & 2 | 1 & 2, 3 & |
| | | | | | 4 |
|---------+--------+------------+-------+-------+------------|
| 200MHz | 66MHz | 3x | 2 & 3 | 1 & 2 | 1 & 2, 5 & |
| | | | | | 6 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL MMX) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JPA | JPB | JP37 |
| speed | speed | | | | |
|---------+--------+------------+-------+-------+------------|
| 166MHz | 66MHz | 2.5x | 1 & 2 | 1 & 2 | 1 & 2, 5 & |
| | | | | | 6 |
|---------+--------+------------+-------+-------+------------|
| 200MHz | 66MHz | 3x | 2 & 3 | 1 & 2 | 1 & 2, 5 & |
| | | | | | 6 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP33 | JP34 | JP39 | JP43 |
|---------+------+--------+---------------------+------------|
| 2.8v | Open | Closed | Open | Pins 1 & 2 |
| | | | | closed |
|---------+------+--------+---------------------+------------|
| 2.9v | Open | Closed | Pins 2 & 4 closed | Pins 1 & 2 |
| | | | | closed |
|---------+------+--------+---------------------+------------|
| 3.1v | Open | Closed | Pins 3 & 4 closed | Pins 1 & 2 |
| | | | | closed |
|---------+------+--------+---------------------+------------|
| 3.3v | Open | Closed | Pins 1 & 3 closed | Pins 1 & 2 |
| | | | | closed |
|---------+------+--------+---------------------+------------|
| 3.5v | Open | Closed | Pins 1 & 3, 2 & 4 | Pins 1 & 2 |
| | | | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (DUAL) |
|------------------------------------------------------------|
| Voltage | V core | JP33 | JP34 | JP39 | JP43 |
|----------+---------+--------------+-------+--------+-------|
| 3.3v | 2.8v | 3 & 4, 5 & 6 | Open | Open | 1 & 2 |
|----------+---------+--------------+-------+--------+-------|
| 3.3v | 2.9v | 3 & 4, 5 & 6 | Open | 2 & 4 | 1 & 2 |
|----------+---------+--------------+-------+--------+-------|
| 3.3v | 3.1v | 3 & 4, 5 & 6 | Open | 3 & 4 | 1 & 2 |
|----------+---------+--------------+-------+--------+-------|
| 3.4v | 2.8v | 3 & 4, 5 & 6 | Open | Open | 2 & 4 |
|----------+---------+--------------+-------+--------+-------|
| 3.4v | 2.9v | 3 & 4, 5 & 6 | Open | 2 & 4 | 2 & 4 |
|----------+---------+--------------+-------+--------+-------|
| 3.4v | 3.1v | 3 & 4, 5 & 6 | Open | 3 & 4 | 2 & 4 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+