SPRING CIRCLE COMPUTER, INC. ============================ ST586 REV. P550 PCI MB Processor CX M1/Pentium Processor Speed 75/90/100/120/133/150/166MHz Chip Set Intel Video Chip Set None Maximum Onboard 128MB (EDO supported) Memory Maximum Video None Memory Cache 256/512KB BIOS AMI/Award Dimensions 280mm x 220mm I/O Options 32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2), cache slot, VRM connector NPU Options None +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |------------------+----------+------------------+-----------| | Serial port 2 | J1 | Turbo LED | J11 pins | | | | | 2 & 3 | |------------------+----------+------------------+-----------| | Serial port 1 | J2 | Green PC | J11 pins | | | | connector | 4 & 5 | |------------------+----------+------------------+-----------| | Floppy drive | J3 | Turbo switch | J11 pins | | interface | | | 6 & 7 | |------------------+----------+------------------+-----------| | Parallel port | J4 | Reset switch | J11 pins | | | | | 9 & 10 | |------------------+----------+------------------+-----------| | IDE interface 2 | J5 | Power LED & | J11 pins | | | | keylock | 11 - 15 | |------------------+----------+------------------+-----------| | IDE interface 1 | J6 | Speaker | J11 pins | | | | | 17 - 20 | |------------------+----------+------------------+-----------| | VRM connector | J8 | 32-bit PCI slots | PC1 - PC4 | |------------------+----------+------------------+-----------| | External battery | J9 | Cache slot | SL1 | |------------------+----------+------------------+-----------| | IDE interface | J10 | | | | LED | | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Label | Position | |------------------------------------+-------+---------------| | | Jumper information unavailable | J12 | Unidentified | |---+--------------------------------+-------+---------------| |>> | Flash BIOS voltage select 5v | JP4 | Pins 1 & 2 | | | | | closed | |---+--------------------------------+-------+---------------| | | Flash BIOS voltage select 12v | JP4 | Pins 2 & 3 | | | | | closed | |---+--------------------------------+-------+---------------| |>> | CMOS memory normal operation | JP5 | Open | |---+--------------------------------+-------+---------------| | | CMOS memory clear | JP5 | Closed | |---+--------------------------------+-------+---------------| |>> | Parallel port IRQ select IRQ7 | JR1 | Pins 1 & 2 | | | | | closed | |---+--------------------------------+-------+---------------| | | Parallel port IRQ select IRQ5 | JR1 | Pins 2 & 3 | | | | | closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM 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) 1M x 36 | (2) 2M x 36 | |------------------+--------------------+--------------------| | 32MB | (2) 4M x 36 | None | |------------------+--------------------+--------------------| | 32MB | (2) 2M x 36 | (2) 2M x 36 | |------------------+--------------------+--------------------| | 40MB | (2) 1M x 36 | (2) 4M x 36 | |------------------+--------------------+--------------------| | 48MB | (2) 2M x 36 | (2) 4M x 36 | |------------------+--------------------+--------------------| | 64MB | (2) 8M x 36 | None | |------------------+--------------------+--------------------| | 64MB | (2) 4M x 36 | (2) 4M x 36 | |------------------+--------------------+--------------------| | 72MB | (2) 1M x 36 | (2) 8M x 36 | |------------------+--------------------+--------------------| | 80MB | (2) 2M x 36 | (2) 8M x 36 | |------------------+--------------------+--------------------| | 96MB | (2) 4M x 36 | (2) 8M x 36 | |------------------+--------------------+--------------------| | 128MB | (2) 8M x 36 | (2) 8M x 36 | |------------------+--------------------+--------------------| | 128MB | (2) 16M x 36 | None | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | TAG | SL1 | |-----------+-------------+-------------+--------------------| | 256KB (A) | (8) 32K x 8 | (1) 8K x 8 | Not installed | |-----------+-------------+-------------+--------------------| | 256KB (B) | None | (1) 8K x 8 | 256KB module | | | | | installed | |-----------+-------------+-------------+--------------------| | 512KB (A) | (8) 64K x 8 | (1) 32K x 8 | Not installed | |-----------+-------------+-------------+--------------------| | 512KB (B) | None | (1) 32K x 8 | 512KB module | | | | | installed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | JP7 | JP9 | |------------+--------------------+--------------------------| | None | Pins 1 & 2 closed | Pins 1 & 2, 4 & 5 closed | |------------+--------------------+--------------------------| | 256KB (A) | Pins 2 & 3 closed | Pins 1 & 2, 5 & 6 closed | |------------+--------------------+--------------------------| | 256KB (B) | Open | Open | |------------+--------------------+--------------------------| | 512KB (A) | Pins 1 & 2 closed | Pins 2 & 3, 4 & 5 closed | |------------+--------------------+--------------------------| | 512KB (B) | Open | Open | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE VOLTAGE CONFIGURATION | |------------------------------------------------------------| | Size | JP6 | |----------------------------+-------------------------------| | | 3.3v | Pins 2 & 3 closed | |---+------------------------+-------------------------------| |>> | 5v mixed | Pins 1 & 2 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED SELECTION (CYRIX) | |------------------------------------------------------------| | Speed | JP1 | JP2 | JP3 | JP8 | |--------+------------+------------+------------+------------| | 120MHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & | | | closed | closed | closed | 2, 5 & 6 | | | | | | closed | |--------+------------+------------+------------+------------| | 150MHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & | | | closed | closed | closed | 2, 5 & 6 | | | | | | closed | |--------+------------+------------+------------+------------| | 166MHz | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & | | | closed | closed | closed | 2, 5 & 6 | | | | | | closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED SELECTION (INTEL) | |------------------------------------------------------------| | Speed | JP1 | JP2 | JP3 | JP8 | |--------+------------+------------+------------+------------| | 75MHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & | | | closed | closed | closed | 2, 4 & 5 | | | | | | closed | |--------+------------+------------+------------+------------| | 90MHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & | | | closed | closed | closed | 2, 4 & 5 | | | | | | closed | |--------+------------+------------+------------+------------| | 100MHz | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & | | | closed | closed | closed | 2, 4 & 5 | | | | | | closed | |--------+------------+------------+------------+------------| | 120MHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & | | | closed | closed | closed | 2, 5 & 6 | | | | | | closed | |--------+------------+------------+------------+------------| | 133MHz | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & | | | closed | closed | closed | 2, 5 & 6 | | | | | | closed | |--------+------------+------------+------------+------------| | 150MHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & | | | closed | closed | closed | 3, 5 & 6 | | | | | | closed | |--------+------------+------------+------------+------------| | 166MHz | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & | | | closed | closed | closed | 3, 5 & 6 | | | | | | closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU VOLTAGE SELECTION | |------------------------------------------------------------| | Voltage | JP10 | |----------------------------+-------------------------------| | | 3.3v | Pins 1 & 2 closed | |---+------------------------+-------------------------------| |>> | 3.4v | Pins 2 & 3 closed | |---+------------------------+-------------------------------| | | 3.5v | Pins 4 & 5 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU VOLTAGE SELECTION | |------------------------------------------------------------| | Setting | J8 | |----------------------------+-------------------------------| | Regular CPU voltage | Pins 4 & 5, 6 & 7, 19 & 20, | | | 21 & 22 closed | |----------------------------+-------------------------------| | VRM module for CPU voltage | Open | +------------------------------------------------------------+ +------------------------------------------------------------+ | DMA CHANNEL SELECTION | |------------------------------------------------------------| | Channel | JR2 | |----------------------------+-------------------------------| |>> | 1 | Pins 1 & 2, 4 & 5 closed | |----+-----------------------+-------------------------------| | | 3 | Pins 2 & 3, 5 & 6 closed | +------------------------------------------------------------+