ACER, INC. ========== V55-2 Device Type Mainboard Processor Pentium/Pentium MMX/ CX 6x86/AM K5/IBM 6x86 Processor Speed 75/90/100/120/133/150/166/200 MHz Chip Set Unidentified Maximum Onboard 128MB (EDO & SDRAM supported) Memory Cache 256/512KB BIOS Unidentified Dimensions 254mm x 218mm I/O Options (CPU) 32-bit ISA slots (3), 32-bit PCI slots (4), bus mouse port, PS/2 keyboard port, serial ports (2), parallel port +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |-----------------+-----------+----------------+-------------| | Standby power | CN1 | Speaker | CN16/pins 7 | | connector | | | - 10 | |-----------------+-----------+----------------+-------------| | Serial port 2 | CN2 | Turbo LED | CN16/pins | | | | | 12 & 13 | |-----------------+-----------+----------------+-------------| | Serial port 1 | CN3 | Reset | CN16/pins | | | | | 19 & 20 | |-----------------+-----------+----------------+-------------| | Parallel port | CN4 | External | CN17 | | | | suspend switch | | |-----------------+-----------+----------------+-------------| | Floppy drive | CN5 | Software | CN18 | | interface | | shutdown | | | | | switch | | |-----------------+-----------+----------------+-------------| | IDE interface 2 | CN6 | IrDA connector | CN19 | |-----------------+-----------+----------------+-------------| | IDE interface 1 | CN9 | IDE interface | CN20 | | | | LED | | |-----------------+-----------+----------------+-------------| | CPU power | CN13 | PS/2 mouse | CN21 | | shorting block | | port | | |-----------------+-----------+----------------+-------------| | CPU fan | CN14 | 32-bit PCI | PC1-PC4 | | connector | | expansion | | | | | slots | | |-----------------+-----------+----------------+-------------| | Keylock | CN16/pins | Cache slot | SL1 | | | 1 & 2 | | | |-----------------+-----------+----------------+-------------| | Power LED | CN16/pins | | | | | 3 - 5 | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Label | Position | |--------------------------------+-------+-------------------| |>> | ROM type select Flash ROM | JP4 | Pins 2 & 3 closed | |---+----------------------------+-------+-------------------| | | ROM type select EPROM | JP4 | Pins 1 & 2 closed | |---+----------------------------+-------+-------------------| |>> | CPU core voltage select | JP6 | Pins 2 & 3 closed | | | 2.8v | | | |---+----------------------------+-------+-------------------| | | CPU core voltage select | JP6 | Pins 1 & 2 closed | | | 3.2v | | | |---+----------------------------+-------+-------------------| |>> | CPU I/O voltage select | JP7 | Pins 2 & 3 closed | | | 3.3v | | | |---+----------------------------+-------+-------------------| | | CPU I/O voltage select | JP7 | Pins 1 & 2 closed | | | 3.5v | | | |---+----------------------------+-------+-------------------| |>> | Factory configured - do | JP10 | Pins 2 & 3 closed | | | not alter | | | |---+----------------------------+-------+-------------------| | | CMOS discharge normal | JP11 | Open | |---+----------------------------+-------+-------------------| | | CMOS discharge clear | JP11 | Closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | ROM BRAND SELECTION | |------------------------------------------------------------| | Brand | JP5 | |----------------------------+-------------------------------| | >> 29EE010 | Pins 2 & 3 closed | |----------------------------+-------------------------------| | NC | Pins 1 & 2 closed | |----------------------------+-------------------------------| | 29F001 | Pins 3 & 4 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | SIMM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | |------------------+--------------------+--------------------| | 8MB | (2) 1M x 32 | None | |------------------+--------------------+--------------------| | 16MB | (2) 2M x 32 | None | |------------------+--------------------+--------------------| | 16MB | (2) 1M x 32 | (2) 1M x 32 | |------------------+--------------------+--------------------| | 24MB | (2) 2M x 32 | (2) 1M x 32 | |------------------+--------------------+--------------------| | 32MB | (2) 4M x 32 | None | |------------------+--------------------+--------------------| | 32MB | (2) 2M x 32 | (2) 2M x 32 | |------------------+--------------------+--------------------| | 40MB | (2) 4M x 32 | (2) 1M x 32 | |------------------+--------------------+--------------------| | 48MB | (2) 4M x 32 | (2) 2M x 32 | |------------------+--------------------+--------------------| | 64MB | (2) 8M x 32 | None | |------------------+--------------------+--------------------| | 64MB | (2) 4M x 32 | (2) 4M x 32 | |------------------+--------------------+--------------------| | 72MB | (2) 8M x 32 | (2) 1M x 32 | |------------------+--------------------+--------------------| | 80MB | (2) 8M x 32 | (2) 2M x 32 | |------------------+--------------------+--------------------| | 96MB | (2) 8M x 32 | (2) 4M x 32 | |------------------+--------------------+--------------------| | 128MB | (2) 8M x 32 | (2) 8M x 32 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE CONFIGURATION | |------------------------------------------------------------| | Size | SL1 | Tag | Bank 0 | |------------+---------------+---------------+---------------| | 256KB | (2) 32K x 32 | (8) 32K x 32 | (2) 32K x 32 | |------------+---------------+---------------+---------------| | 512KB | (4) 32K x 32 | (8) 32K x 32 | (4) 32K x 32 | |------------+---------------+---------------+---------------| | 512KB | (2) 64K x 32 | (8) 32K x 32 | (2) 64K x 32 | |------------------------------------------------------------| | Note: The location of Tag SRAM is unidentified. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | JP8 | JP9 | |-----------------+--------------------+---------------------| | >> 256KB | Pins 2 & 3 closed | Pins 2 & 3 closed | |-----------------+--------------------+---------------------| | 512KB | Pins 1 & 2 closed | Pins 1 & 2 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU FREQUENCY SELECTION (INTEL) | |------------------------------------------------------------| | CPU | Clock | Clock | SW1/1 | SW1/2 | SW1/3 | SW1/4 | | | Speed | Ratio | | | | | |--------+-----------+-------+-------+-------+-------+-------| | 75MHz | 50MHz | 1.5x | Off | Off | On | On | |--------+-----------+-------+-------+-------+-------+-------| | 90MHz | 60MHz | 1.5x | Off | Off | Off | On | |--------+-----------+-------+-------+-------+-------+-------| | 100MHz | 66MHz | 1.5x | Off | Off | On | Off | |--------+-----------+-------+-------+-------+-------+-------| | 120MHz | 60MHz | 2x | Off | On | Off | On | |--------+-----------+-------+-------+-------+-------+-------| | 133MHz | 66MHz | 2x | Off | On | On | Off | |--------+-----------+-------+-------+-------+-------+-------| | 150MHz | 60MHz | 2.5x | On | On | Off | On | |--------+-----------+-------+-------+-------+-------+-------| | 166MHz | 66MHz | 2.5x | On | On | On | Off | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU FREQUENCY SELECTION (INTEL MMX) | |------------------------------------------------------------| | CPU | Clock | Clock | SW1/1 | SW1/2 | SW1/3 | SW1/4 | | | Speed | Ratio | | | | | |--------+-----------+-------+-------+-------+-------+-------| | 166MHz | 66MHz | 2.5x | On | On | On | Off | |--------+-----------+-------+-------+-------+-------+-------| | 180MHz | 60MHz | 3x | On | Off | Off | On | |--------+-----------+-------+-------+-------+-------+-------| | 200MHz | 66MHz | 3x | On | Off | On | Off | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU FREQUENCY SELECTION (AM K5) | |------------------------------------------------------------| | CPU | Clock | Clock | SW1/1 | SW1/2 | SW1/3 | SW1/4 | | | Speed | Ratio | | | | | |--------+-----------+-------+-------+-------+-------+-------| | 75MHz | 50MHz | 1.5x | Off | Off | On | On | |--------+-----------+-------+-------+-------+-------+-------| | 90MHz | 60MHz | 1.5x | Off | Off | Off | On | |--------+-----------+-------+-------+-------+-------+-------| | 100MHz | 66MHz | 1.5x | Off | Off | On | Off | |--------+-----------+-------+-------+-------+-------+-------| | 120MHz | 60MHz | 2x | Off | On | Off | On | |--------+-----------+-------+-------+-------+-------+-------| | 133MHz | 66MHz | 2x | Off | On | On | Off | |--------+-----------+-------+-------+-------+-------+-------| | 150MHz | 60MHz | 2.5x | On | On | Off | On | |--------+-----------+-------+-------+-------+-------+-------| | 166MHz | 66MHz | 2.5x | On | On | On | Off | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU FREQUENCY SELECTION (CX 6X86) | |------------------------------------------------------------| | CPU | Host Bus | Clock | SW1/1 | SW1/2 | SW1/3 | SW1/4 | | | | Ratio | | | | | |--------+----------+--------+-------+-------+-------+-------| | 120MHz | 50MHz | 2x | Off | On | On | On | |--------+----------+--------+-------+-------+-------+-------| | 150MHz | 60MHz | 2x | Off | On | Off | On | |--------+----------+--------+-------+-------+-------+-------| | 166MHz | 66MHz | 2x | Off | On | On | Off | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU FREQUENCY SELECTION (IBM 6X86) | |------------------------------------------------------------| | CPU | Host Bus | Clock | SW1/1 | SW1/2 | SW1/3 | SW1/4 | | | | Ratio | | | | | |--------+----------+--------+-------+-------+-------+-------| | 120MHz | 50MHz | 2x | Off | On | On | On | |--------+----------+--------+-------+-------+-------+-------| | 150MHz | 60MHz | 2x | Off | On | Off | On | |--------+----------+--------+-------+-------+-------+-------| | 166MHz | 66MHz | 2x | Off | On | On | Off | +------------------------------------------------------------+