Path: utzoo!attcan!uunet!jarthur!nntp-server.caltech.edu!mustang!data.nas.nasa.gov!ames!rex!wuarchive!udel!brahms.udel.edu!jeremym
From: jeremym@brahms.udel.edu (Jeremy A Moskowitz)
Newsgroups: comp.sys.amiga.tech
Subject: Re: 14Mhz a500 hack & the 74f74
Message-ID: <14492@brahms.udel.edu>
Date: 10 Oct 90 13:26:43 GMT
References: <63606@iuvax.cs.indiana.edu>
Organization: University of Delaware
Lines: 15

In article <63606@iuvax.cs.indiana.edu> faheyr@silver.ucs.indiana.edu (Bob Fahey <NECR0SIS>) writes:
>I couldn't get the 74f74 d-flip flop, but got a 74als74 instead. I was told
>that it would function just as the 74f74 would (i.e. pos. edge), but I
>couldnt get the thing to work properly. I don't think it was my 68000, since
>I tried 3 different ones.
>
>Is it the flip flop that causes the 14Mhz side to not come up? I mean, is
>there something about the 74als74 that is different from the 74f74?

The 74F74 chip is a Flip Flop D gate type. And it is damn fast. The als 
(which I've never heard of) has an LS in the title of the chip! It's
slower! No wonder it wont work. Call 1-800-Fone-ACP and
get the 16MHZ 68000 and 74F74. This is the place to go.
 
-jeremym@brahms.udel.edu