DECISION COMPUTER INTERNATIONAL CO., LTD. ========================================= 8255/8254 LAB CARD Card Type Data acquisition Chip Set NEC 8255 I/O Options Digital I/O ports (2) Data Bus 8-bit ISA +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Function | Label | Function | Label | |-----------------------------+-------+--------------+-------| | Breadboard (see pinout | BB1 | Unidentified | CN3 | | below) | | | | |-----------------------------+-------+--------------+-------| | Digital I/O port 1 (see | CN1 | Unidentified | CN4 | | pinout below) | | | | |-----------------------------+-------+--------------+-------| | Digital I/O port 2 (see | CN2 | | | | pinout below) | | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | BB1 PINOUT | |------------------------------------------------------------| | Function | Row | Function | Row | |----------------------+-------+----------------------+------| | Channel 1A bit 7 | 1 | Channel 1C bit 6 | 21 | |----------------------+-------+----------------------+------| | Channel 1A bit 6 | 2 | Channel 1C bit 5 | 22 | |----------------------+-------+----------------------+------| | Channel 1A bit 5 | 3 | Channel 1C bit 4 | 23 | |----------------------+-------+----------------------+------| | Channel 1A bit 4 | 4 | Channel 1C bit 3 | 24 | |----------------------+-------+----------------------+------| | Channel 1A bit 3 | 5 | Channel 1C bit 2 | 25 | |----------------------+-------+----------------------+------| | Channel 1A bit 2 | 6 | Channel 1C bit 1 | 26 | |----------------------+-------+----------------------+------| | Channel 1A bit 1 | 7 | Channel 1C bit 0 | 27 | |----------------------+-------+----------------------+------| | Channel 1A bit 0 | 8 | Not used | 28 | |----------------------+-------+----------------------+------| | Not used | 9 | Channel 1B bit 7 | 29 | |----------------------+-------+----------------------+------| | Clock signal 0 in | 10 | Channel 1B bit 6 | 30 | |----------------------+-------+----------------------+------| | Clock signal 1 in | 11 | Channel 1B bit 5 | 31 | |----------------------+-------+----------------------+------| | Clock signal 2 in | 12 | Channel 1B bit 4 | 32 | |----------------------+-------+----------------------+------| | Gate signal 0 | 13 | Channel 1B bit 3 | 33 | |----------------------+-------+----------------------+------| | Gate signal 1 | 14 | Channel 1B bit 2 | 34 | |----------------------+-------+----------------------+------| | Gate signal 2 | 15 | Channel 1B bit 1 | 35 | |----------------------+-------+----------------------+------| | Clock signal 0 out | 16 | Channel 1B bit 0 | 36 | |----------------------+-------+----------------------+------| | Clock signal 1 out | 17 | Not used | 37 | |----------------------+-------+----------------------+------| | Clock signal 2 out | 18 | I/O write register | 38 | |----------------------+-------+----------------------+------| | Not used | 19 | I/O read register | 39 | |----------------------+-------+----------------------+------| | Channel 1C bit 7 | 20 | | | |------------------------------------------------------------| | Note:The breadboard is designed to prototype designs. | | All holes in a given row are electrically connected. | | Rows marked not used may be utilized by the designer | | for extra connections. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CN1 PINOUT | |------------------------------------------------------------| | Function | Pin | Function | Pin | |------------------------+------+---------------------+------| | Ground | 1 | Channel 1C bit 6 | 21 | |------------------------+------+---------------------+------| | Ground | 2 | Channel 1C bit 7 | 22 | |------------------------+------+---------------------+------| | Ground | 3 | Channel 1C bit 4 | 23 | |------------------------+------+---------------------+------| | Channel 1A bit 3 | 4 | Channel 1C bit 5 | 24 | |------------------------+------+---------------------+------| | Channel 1A bit 1 | 5 | Channel 1C bit 1 | 25 | |------------------------+------+---------------------+------| | Channel 1A bit 2 | 6 | Channel 1C bit 0 | 26 | |------------------------+------+---------------------+------| | Clock signal 0 in | 7 | Channel 1B bit 7 | 27 | |------------------------+------+---------------------+------| | Channel 1A bit 0 | 8 | Channel 1C bit 2 | 28 | |------------------------+------+---------------------+------| | Gate signal 0 | 9 | Channel 1B bit 6 | 29 | |------------------------+------+---------------------+------| | Clock signal 0 out | 10 | Channel 1C bit 3 | 30 | |------------------------+------+---------------------+------| | Clock signal 2 out | 11 | Channel 1B bit 5 | 31 | |------------------------+------+---------------------+------| | Clock signal 2 in | 12 | Channel 1B bit 0 | 32 | |------------------------+------+---------------------+------| | Clock signal 1 in | 13 | Channel 1B bit 4 | 33 | |------------------------+------+---------------------+------| | Gate signal 2 | 14 | Channel 1B bit 1 | 34 | |------------------------+------+---------------------+------| | Clock signal 1 out | 15 | Channel 1B bit 3 | 35 | |------------------------+------+---------------------+------| | Gate signal 1 | 16 | Channel 1B bit 2 | 36 | |------------------------+------+---------------------+------| | Channel 1A bit 5 | 17 | +5V power | 37 | |------------------------+------+---------------------+------| | Channel 1A bit 4 | 18 | -5V power | 38 | |------------------------+------+---------------------+------| | Channel 1A bit 7 | 19 | +12V power | 39 | |------------------------+------+---------------------+------| | Channel 1A bit 6 | 20 | -12V power | 40 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CN2 PINOUT | |------------------------------------------------------------| | Function | Pin | Function | Pin | |-----------------------+------+----------------------+------| | Ground | 1 | Channel 2C bit 7 | 21 | |-----------------------+------+----------------------+------| | Ground | 2 | Channel 2C bit 6 | 22 | |-----------------------+------+----------------------+------| | Ground | 3 | Channel 2C bit 5 | 23 | |-----------------------+------+----------------------+------| | Ground | 4 | Channel 2C bit 4 | 24 | |-----------------------+------+----------------------+------| | Ground | 5 | Channel 2C bit 0 | 25 | |-----------------------+------+----------------------+------| | Ground | 6 | Channel 2C bit 1 | 26 | |-----------------------+------+----------------------+------| | Ground | 7 | Channel 2C bit 2 | 27 | |-----------------------+------+----------------------+------| | Ground | 8 | Channel 2B bit 7 | 28 | |-----------------------+------+----------------------+------| | Ground | 9 | Channel 2C bit 3 | 29 | |-----------------------+------+----------------------+------| | Ground | 10 | Channel 2B bit 6 | 30 | |-----------------------+------+----------------------+------| | Ground | 11 | Channel 2B bit 0 | 31 | |-----------------------+------+----------------------+------| | Ground | 12 | Channel 2B bit 5 | 32 | |-----------------------+------+----------------------+------| | Channel 2A bit 0 | 13 | Channel 2B bit 1 | 33 | |-----------------------+------+----------------------+------| | Channel 2A bit 1 | 14 | Channel 2B bit 4 | 34 | |-----------------------+------+----------------------+------| | Channel 2A bit 2 | 15 | Channel 2B bit 2 | 35 | |-----------------------+------+----------------------+------| | Channel 2A bit 3 | 16 | Channel 2B bit 3 | 36 | |-----------------------+------+----------------------+------| | Channel 2A bit 4 | 17 | +5V power | 37 | |-----------------------+------+----------------------+------| | Channel 2A bit 5 | 18 | -5V power | 38 | |-----------------------+------+----------------------+------| | Channel 2A bit 6 | 19 | +12V power | 39 | |-----------------------+------+----------------------+------| | Channel 2A bit 7 | 20 | -12V power | 40 | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Setting | Label | Position | |-----------------------------------------+-------+----------| |>> | Counter 0 uses internal clock | JP1/A | Closed | | | source | | | |---+-------------------------------------+-------+----------| | | Counter 0 uses external clock | JP1/A | Open | | | source | | | |---+-------------------------------------+-------+----------| |>> | Counter 1 uses internal clock | JP1/B | Closed | | | source | | | |---+-------------------------------------+-------+----------| | | Counter 1 uses external clock | JP1/B | Open | | | source | | | |---+-------------------------------------+-------+----------| |>> | Counter 2 uses internal clock | JP1/C | Closed | | | source | | | |---+-------------------------------------+-------+----------| | | Counter 2 uses external clock | JP1/C | Open | | | source | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | BASE I/O ADDRESS | |------------------------------------------------------------| | Setting | JP2/A | JP2/B | JP2/C | JP2/D | JP2/E | JP2/F | |----------+--------+--------+-------+-------+-------+-------| | | 000h | Closed | Closed |Closed |Closed |Closed |Closed | |---+------+--------+--------+-------+-------+-------+-------| | | 010h | Closed | Closed |Closed |Closed |Closed | Open | |---+------+--------+--------+-------+-------+-------+-------| | | 020h | Closed | Closed |Closed |Closed | Open |Closed | |---+------+--------+--------+-------+-------+-------+-------| | | 030h | Closed | Closed |Closed |Closed | Open | Open | |---+------+--------+--------+-------+-------+-------+-------| | | 040h | Closed | Closed |Closed | Open |Closed |Closed | |---+------+--------+--------+-------+-------+-------+-------| |>> | 2A0h | Open | Closed | Open |Closed | Open |Closed | |---+------+--------+--------+-------+-------+-------+-------| | | 3B0h | Open | Open | Open |Closed | Open | Open | |---+------+--------+--------+-------+-------+-------+-------| | | 3C0h | Open | Open | Open | Open |Closed |Closed | |---+------+--------+--------+-------+-------+-------+-------| | | 3D0h | Open | Open | Open | Open |Closed | Open | |---+------+--------+--------+-------+-------+-------+-------| | | 3E0h | Open | Open | Open | Open | Open |Closed | |---+------+--------+--------+-------+-------+-------+-------| | | 3F0h | Open | Open | Open | Open | Open | Open | |------------------------------------------------------------| | Note: A total of 64 base address settings are | | available. The jumpers are a binary representation of | | the decimal memory addresses. JP2/A is the Most | | Significant Bit and jumper JP2/F is the Least | | Significant Bit. The jumpers have the following decimal| | values: JP2/A=512, JP2/B=256, JP2/C=128, JP2/D=64, | | JP2/E=32, JP2/E=16. Open the jumpers and add the values| | of the jumpers that are open to obtain the correct | | memory address. (Open=1, Closed=0) | +------------------------------------------------------------+ +------------------------------------------------------------+ | WAIT STATES | |------------------------------------------------------------| | Setting | JP3/A | JP3/B | JP3/C | |---------------+--------------+--------------+--------------| | 0 | Closed | Open | Open | |---------------+--------------+--------------+--------------| | 1 | Open | Closed | Open | |---------------+--------------+--------------+--------------| | 2 | Open | Open | Closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | DIAGNOSTIC LED(S) | |------------------------------------------------------------| | The function of the LED is unidentified. | +------------------------------------------------------------+