AMPRO COMPUTERS, INC. ===================== LITTLE BOARD/486 Processor 80486SX/80487SX/80486DX Processor 20/33MHz Speed Chip Set Ampro Max. onboard 16MB DRAM Cache 32KB optional (location unknown) BIOS Award Dimensions 330mm x 218mm I/O Options Floppy drive interface, IDE interface, parallel port, SCSI connector, serial ports (2) NPU Options None +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |-------------------+----------+------------------+----------| | Power connector | J1 | Parallel port | J6 | |-------------------+----------+------------------+----------| | Serial port | J2 | SCSI interface | J7 | | (COM2) | | | | |-------------------+----------+------------------+----------| | Serial port | J3 | Floppy drive | J8 | | (COM1) | | interface | | |-------------------+----------+------------------+----------| | Utility connector | J4 | IDE interface | J11 | |-------------------+----------+------------------+----------| | Keyboard | J5 | Power J1-1 to | W7 | | | | +12V BUS | | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Jumper/Switch | Position | |-------------------------------+---------------+------------| |>> | SCSI controller enabled | W1 | Closed | |---+---------------------------+---------------+------------| | | SCSI controller disabled | W1 | Open | |---+---------------------------+---------------+------------| |>> | Factory configured - do | W3 | N/A | | | not alter | | | |---+---------------------------+---------------+------------| |>> | SCSI controller select | W5 | Open | | | IRQ15 | | | |---+---------------------------+---------------+------------| | | SCSI controller select | W5 | Closed | | | IRQ11 | | | |---+---------------------------+---------------+------------| |>> | SCSI termination power | W6 | Open | | | enabled | | | |---+---------------------------+---------------+------------| | | SCSI termination power | W6 | Closed | | | disabled | | | |---+---------------------------+---------------+------------| |>> | Factory configured - do | W10 | Closed | | | not alter | | | |---+---------------------------+---------------+------------| |>> | Factory configured - do | W11 | pins 1 & 2 | | | not alter | | closed | |---+---------------------------+---------------+------------| |>> | Flash EPROM programming | W16 | Open | | | power enabled | | | |---+---------------------------+---------------+------------| | | Flash EPROm programming | W16 | Closed | | | power disabled | | | |---+---------------------------+---------------+------------| |>> | Watchdog timer select I/O | W17 | pins 1 & 2 | | | CHCK | | closed | |---+---------------------------+---------------+------------| | | Watchdog timer select | W17 | pins 2 & 3 | | | reset | | closed | |---+---------------------------+---------------+------------| | | Watchdog timer disabled | W17 | Open | |---+---------------------------+---------------+------------| |>> | Floppy drive interface | W18 | Open | | | enabled | | | |---+---------------------------+---------------+------------| | | Floppy drive interface | W18 | Closed | | | disabled | | | |---+---------------------------+---------------+------------| |>> | Floppy precompensation | W19 | Open | | | (PCVAL) selection | | | |---+---------------------------+---------------+------------| | | Floppy precompensation | W19 | Closed | | | (PCVAL) none | | | |---+---------------------------+---------------+------------| |>> | Floppy drive select IRQ6 | W20 & W27 | Closed | |---+---------------------------+---------------+------------| | | Floppy drive select IRQ6 | W20 & W27 | Open | | | disabled | | | |---+---------------------------+---------------+------------| |>> | External cache enabled | W21 | Open | |---+---------------------------+---------------+------------| | | External cache disabled | W21 | Closed | |---+---------------------------+---------------+------------| |>> | Factory configured - do | W22 | N/A | | | not alter | | | |---+---------------------------+---------------+------------| |>> | Power fail NMI enabled | W23 | Open | |---+---------------------------+---------------+------------| | | Power fail NMI disabled | W23 | Closed | |---+---------------------------+---------------+------------| |>> | Parallel port interrrupt | W24 | Open | | | option select via setup | | | |---+---------------------------+---------------+------------| | | Parallel port interrrupt | W24 | Closed | | | option disabled | | | |------------------------------------------------------------| | Note: W18 may either be an option or is not user | | configurable. | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | |----------------------------+-------------------------------| | 1MB | (4) 256K x 9 | |----------------------------+-------------------------------| | 4MB | (4) 1M x 9 | |----------------------------+-------------------------------| | 16MB | (4) 4M x 9 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE CONFIGURATION | |------------------------------------------------------------| | Cache | DRAM | U9 | U10 | Tag U12 | Tag U13 | |-------+------+------------+----------+----------+----------| | 32KB | 4MB | (2) 8K x 8 | (2) 8K x | (2) 8K x | NONE | | | | | 8 | 8 | | |-------+------+------------+----------+----------+----------| | 32KB | 16MB | (2) 8K x 8 | (2) 8K x | (2) 8K x | (2) 8K x | | | | | 8 | 8 | 8 | +------------------------------------------------------------+ +------------------------------------------------------------+ | EPROM CONFIGURATION (S0) | |------------------------------------------------------------| | EPROM | W8 | W9 | W25 | |-----------+--------+-------------------------+-------------| | 27C256 | Open | pins 7 & 8, 10 & 11 | pins 1 & 2 | |-----------+--------+-------------------------+-------------| | 27C512 | Open | pins 1 & 4, 7 & 8, 10 & | pins 1 & 2 | | | | 11 | | |-----------+--------+-------------------------+-------------| | 27C010 | Open | pins 1 & 4, 2 & 5, 6 & | pins 1 & 2 | | | | 9, 7 & 8 | | |-----------+--------+-------------------------+-------------| | 27C020 | Open | pins 1 & 4, 2 & 5, 6 & | pins 1 & 2 | | | | 9, 7 & 8, 11 & 12 | | |-----------+--------+-------------------------+-------------| | 27C040 | Open | pins 1 & 4, 2 & 3, 6 & | pins 1 & 2 | | | | 9, 7 & 8, 11 & 12 | | |-----------+--------+-------------------------+-------------| | 27C080 | Closed | pins 1 & 4, 2 & 3, 7 & | pins 1 & 2 | | | | 8, 11 & 12 | | |-----------+--------+-------------------------+-------------| | 62256 | Open | pins 4 & 7, 5 & 8, 10 & | pins 1 & 2 | | | | 11 | or 2 & 3 | |-----------+--------+-------------------------+-------------| | 628128 | Open | pins 1 & 2, 4 & 7, 5 & | pins 1 & 2 | | | | 8, 10 & 11 | or 2 & 3 | |-----------+--------+-------------------------+-------------| | uPD434000 | Open | pins 1 & 2, 3 & 6, 4 & | pins 1 & 2 | | | | 7, 5 & 8, 11 & 12 | or 2 & 3 | |-----------+--------+-------------------------+-------------| | 28F256 | Open | pins 2 & 5, 6 & 9, 7 & | pins 1 & 2 | | | | 8 | | |-----------+--------+-------------------------+-------------| | 28F512 | Open | pins 1 & 4, 2 & 5, 6 & | pins 1 & 2 | | | | 9, 7 & 8 | | |-----------+--------+-------------------------+-------------| | 28F010 | Open | pins 1 & 4, 2 & 5, 6 & | pins 1 & 2 | | | | 9, 7 & 8 | | |-----------+--------+-------------------------+-------------| | 28F020 | Open | pins 1 & 4, 2 & 5, 6 & | pins 1 & 2 | | | | 9, 7 & 8, 11 & 12 | | |------------------------------------------------------------| | Note:Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | EPROM/FLASH EPROM CONFIGURATION (S1 & S2) | |------------------------------------------------------------| | EPROM | W12 | W13 | W14 | W15 | |-------+-------------+------------+------------+------------| | 128KB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | | | closed | closed | closed | closed | |-------+-------------+------------+------------+------------| | 256KB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | | | closed | closed | closed | closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | SCSI CONTROLLER CONFIGURATION | |------------------------------------------------------------| | DMA | W2 | W4 | |------------------+--------------------+--------------------| | 6 | pins 1 & 2 closed | Open | |------------------+--------------------+--------------------| | 0 | pins 2 & 3 closed | Closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | UTILITY CONNECTOR (J4) PIN CONFIGURATION | |------------------------------------------------------------| | Pin | Signal Name | Function | |------+-------------+---------------------------------------| | 1 | Speaker | Audio signal | |------+-------------+---------------------------------------| | 2 | Speaker | Ground | |------+-------------+---------------------------------------| | 3 | Ground | To one side of Reset button | |------+-------------+---------------------------------------| | 4 | Reset | To other side of Reset button | |------+-------------+---------------------------------------| | 5 | LED Cathode | Ground return | |------+-------------+---------------------------------------| | 6 | LED anode | Current source (+5v through 330 ohms) | |------+-------------+---------------------------------------| | 7 | Ground | Ground return | |------+-------------+---------------------------------------| | 8 | +12V power | Connected to P1 pin B9 | |------+-------------+---------------------------------------| | 9 | -5V power | Connected to P1 pin B5 | |------+-------------+---------------------------------------| | 10 | -12V power | Connected to P1 pin B7 | |------+-------------+---------------------------------------| | 11 | Ground | Ground return | |------+-------------+---------------------------------------| | 12 | POWERGOOD | Power supply status | +------------------------------------------------------------+ +------------------------------------------------------------+ | WATCHDOG TIMER CONFIGURATION | |------------------------------------------------------------| | Setting | W17 | W23 | |--------------------+---------------------------+-----------| | Disabled | Open | Open | |--------------------+---------------------------+-----------| | IOCHCK (NMI) | Pins 1 & 2 closed | Open | |--------------------+---------------------------+-----------| | Reset | pins 2 & 3 closed | N/A | |------------------------------------------------------------| | Note:I/O channel check is the bus signal that triggers a | | non-maskable interrupt (NMI) | | | | Reset is a hard reset signal, the same as pressing the | | reset button. | +------------------------------------------------------------+