Hi all, i've got a bunch of old chips that all have the prefix PC or PCF, half of them goes by 74xx - which i'm unsure if it's the usual 74 series or not - and the other half goes by 73xx which i don't have a clue what it is. Anyone? Karl Höstrusk och grå moln - köp en resa till solen på Yahoo! Resor på adressen http://se.docs.yahoo.com/travel/index.html