I'm curious as to what the 9956 is for? One might be able to hack something together with a NPN transistor and a TTL and gate. This looks to be one of the oddball chips that Fairchild made in the early days, before most settled down to TTL being the more common. Dwight ________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of GerardCJAT via cctalk <cctalk at classiccmp.org> Sent: Monday, February 4, 2019 11:05 PM To: cctech at classiccmp.org; cctalk at classiccmp.org Subject: WTB : CTL, CTuL 9956 ?? This is a (very ) long shoot ! I am looking for ( Fairchild ? ) CTL / CTuL 9956 chips. Anyone ? Thanks.