14Mhz a500 hack & the 74f74

Article View: comp.sys.amiga.tech

Article #5715

Back to comp.sys.amiga.tech Previous Next

#5715

From: Bob Fahey <NECR0SIS>
Date: Wed, 10 Oct 1990 03:34

19 lines
1352 bytes

Hi there.

I tried doing the 14Mhz a500 hack a while back, and I was wondering if one
of you hardware gurus could tell me something:

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?

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   |

Technical Details

Message-ID: <63606@iuvax.cs.indiana.edu>

Path:

arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!sol.ctr.columbia.edu!cica!iuvax!silver!faheyr

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!sol.ctr.columbia.edu!cica!iuvax!silver!faheyr
From: faheyr@silver.ucs.indiana.edu (Bob Fahey <NECR0SIS>)
Newsgroups: comp.sys.amiga.tech
Subject: 14Mhz a500 hack & the 74f74
Message-ID: <63606@iuvax.cs.indiana.edu>
Date: 10 Oct 90 03:34:25 GMT
Sender: news@iuvax.cs.indiana.edu
Reply-To: faheyr@silver.ucs.indiana.edu (Bob Fahey <NECR0SIS>)
Organization: Indiana University, Bloomington
Lines: 19