[comp.sys.amiga] 14Mhz a500 hack & the 74f74

blakec@pi3.local (Carl D. Blake) (10/10/90)

>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?

Yes, the 74als74 is slower than the 74f74.  The 74als74 probably delayed
the clock signal too much.

>Bob Fahey
>
>|       ///| a.k.a. NECR0SIS   oo     faheyr@silver.ucs.indiana.edu  -or-    |
>|  \\\ ///_|                  \__/    faheyr@rose.ucs.indiana.edu            |
>|   \XXX/  |  M  I  G  A                                                     |
>|                             "'Ere long done do does did..."  -The Smiths   |

==============================================================================
Carl D. Blake                      | My opinions are my own.  I do not
blakec%tuva.sainet@ccc.nmfecc.gov  | represent SAIC in any way.
Science Applications International |
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