name: 6850 function: Asynchronous Communications Interface Adaptor (ACIA) package: DIP,24 manufacturer: Motorola added-by: Mario Becroft +--()--+ VSS | 1 24| CTS RX DATA | 2 23| DCD1 RX CLK | 3 22| D0 TX CLK | 4 21| D1 RTS | 5 20| D2 TX DATA | 6 19| D3 IRQ | 7 18| D4 CS0 | 8 17| D5 CS2 | 9 16| D6 CS1 |10 15| D7 RS |11 14| E VCC |12 13| R/W +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/