68153 680x0 family bus interrupter. +--------------+ VCC |1 +--+ 40| A3 R//W |2 39| A2 /CE |3 38| A1 /DTACK |4 37| D7 /IACK |5 36| D6 /IACKi |6 35| D5 /IACKo |7 34| D4 /IRQ1 |8 33| D3 GND |9 32| D2 GND |10 31| GND VCC |11 68153 30| VCC /IRQ2 |12 29| D1 /IRQ3 |13 28| D0 /IRQ4 |14 27| /INTAE /IRQ5 |15 26| INTAL1 /IRQ6 |16 25| INTAL0 /IRQ7 |17 24| /INT3 CLK |18 23| /INT2 /INT0 |19 22| /INT1 GND |20 21| VCC +--------------+ [This information is part of the GIICM]