name: RP5C01 function: C-MOS Realtime Clock package: DIL,18 manufacturer: Ricoh added-by: Saku Taipale comment: Used in MSX2/2+ computers +--()--+ /cs | 1 18| Vdd CS | 2 17| OSC, out ADJ | 3 16| OSC, in A0 | 4 15| ALARM A1 | 5 14| D3 A2 | 6 13| D2 A3 | 7 12| D1 RD | 8 11| D0 GND | 9 10| WR +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/