51 HM2 Pin Descriptors:
    pin 0:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x05 (StepGen)
        Secondary Unit: 0x00
        Secondary Pin: 0x82 (Dir/Table2, Output)
    pin 1:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x05 (StepGen)
        Secondary Unit: 0x00
        Secondary Pin: 0x81 (Step/Table1, Output)
    pin 2:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x05 (StepGen)
        Secondary Unit: 0x01
        Secondary Pin: 0x82 (Dir/Table2, Output)
    pin 3:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x05 (StepGen)
        Secondary Unit: 0x01
        Secondary Pin: 0x81 (Step/Table1, Output)
    pin 4:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x05 (StepGen)
        Secondary Unit: 0x02
        Secondary Pin: 0x82 (Dir/Table2, Output)
    pin 5:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x05 (StepGen)
        Secondary Unit: 0x02
        Secondary Pin: 0x81 (Step/Table1, Output)
    pin 6:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x05 (StepGen)
        Secondary Unit: 0x03
        Secondary Pin: 0x82 (Dir/Table2, Output)
    pin 7:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x05 (StepGen)
        Secondary Unit: 0x03
        Secondary Pin: 0x81 (Step/Table1, Output)
    pin 8:
        Primary Tag: 0x03 (IOPort)
    pin 9:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x06 (PWM)
        Secondary Unit: 0x00
        Secondary Pin: 0x81 (PWM, Output)
    pin 10:
        Primary Tag: 0x03 (IOPort)
    pin 11:
        Primary Tag: 0x03 (IOPort)
    pin 12:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x1B ((unknown-gtag-27))
        Secondary Unit: 0x00
        Secondary Pin: 0x81 (Unknown-Gtag27-Chan0-Pin129, Output)
    pin 13:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x1C ((unknown-gtag-28))
        Secondary Unit: 0x00
        Secondary Pin: 0x01 (Unknown-Gtag28-Chan0-Pin1, Input)
    pin 14:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x04 (QCount)
        Secondary Unit: 0x00
        Secondary Pin: 0x03 (Quad-IDX, Input)
    pin 15:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x04 (QCount)
        Secondary Unit: 0x00
        Secondary Pin: 0x02 (Quad-B, Input)
    pin 16:
        Primary Tag: 0x03 (IOPort)
        Secondary Tag: 0x04 (QCount)
        Secondary Unit: 0x00
        Secondary Pin: 0x01 (Quad-A, Input)
    pin 17:
        Primary Tag: 0x03 (IOPort)
    pin 18:
        Primary Tag: 0x03 (IOPort)
    pin 19:
        Primary Tag: 0x03 (IOPort)
    pin 20:
        Primary Tag: 0x03 (IOPort)
    pin 21:
        Primary Tag: 0x03 (IOPort)
    pin 22:
        Primary Tag: 0x03 (IOPort)
    pin 23:
        Primary Tag: 0x03 (IOPort)
    pin 24:
        Primary Tag: 0x03 (IOPort)
    pin 25:
        Primary Tag: 0x03 (IOPort)
    pin 26:
        Primary Tag: 0x03 (IOPort)
    pin 27:
        Primary Tag: 0x03 (IOPort)
    pin 28:
        Primary Tag: 0x03 (IOPort)
    pin 29:
        Primary Tag: 0x03 (IOPort)
    pin 30:
        Primary Tag: 0x03 (IOPort)
    pin 31:
        Primary Tag: 0x03 (IOPort)
    pin 32:
        Primary Tag: 0x03 (IOPort)
    pin 33:
        Primary Tag: 0x03 (IOPort)
    pin 34:
        Primary Tag: 0x03 (IOPort)
    pin 35:
        Primary Tag: 0x03 (IOPort)
    pin 36:
        Primary Tag: 0x03 (IOPort)
    pin 37:
        Primary Tag: 0x03 (IOPort)
    pin 38:
        Primary Tag: 0x03 (IOPort)
    pin 39:
        Primary Tag: 0x03 (IOPort)
    pin 40:
        Primary Tag: 0x03 (IOPort)
    pin 41:
        Primary Tag: 0x03 (IOPort)
    pin 42:
        Primary Tag: 0x03 (IOPort)
    pin 43:
        Primary Tag: 0x03 (IOPort)
    pin 44:
        Primary Tag: 0x03 (IOPort)
    pin 45:
        Primary Tag: 0x03 (IOPort)
    pin 46:
        Primary Tag: 0x03 (IOPort)
    pin 47:
        Primary Tag: 0x03 (IOPort)
    pin 48:
        Primary Tag: 0x03 (IOPort)
    pin 49:
        Primary Tag: 0x03 (IOPort)
    pin 50:
        Primary Tag: 0x03 (IOPort)