8253, 8254 Programmable interval timer/counter. +--------------+ D7 |1 +--+ 24| VCC D6 |2 23| /WR D5 |3 22| /RD D4 |4 21| /CE D3 |5 20| A1 D2 |6 8253 19| A0 D1 |7 8254 18| CLK2 D0 |8 17| OUT2 CLK0 |9 16| G2 OUT0 |10 15| CLK1 G0 |11 14| G1 GND |12 13| OUT1 +--------------+ [This information is part of the GIICM]