Path: utzoo!attcan!uunet!willett!ForthNet
From: ForthNet@willett.UUCP (ForthNet articles from GEnie)
Newsgroups: comp.lang.forth
Subject: Forth Engines / Harris
Message-ID: <1049.UUL1.3#5129@willett.UUCP>
Date: 1 Jun 90 03:45:26 GMT
Organization: Latest link in the ForthNet chain.  (Pgh, PA)
Lines: 25


 Date: 05-30-90 (01:33)              Number: 569 (Echo)
   To: PETE KOZIAR                   Refer#: 549
 From: KENNETH O'HESKIN                Read: NO
 Subj: ASIC BUS                      Status: PUBLIC MESSAGE

 PK>I got the ASIC bus driving LEDS using two 74HC374's and a 74HC138.  N
 PK>PALs required.

         Right enough, but I have the GAL anyhow so I might as well
         enjoy it. I must say it made my decoding problem pretty
         manageable.  Need two 8 bit ports and some handshaking,
         and have the write running fine. I'm using the GAL selects
         to enable my buffers and strobe line, but might need to add a
         gate to make the read strobe properly. Sorting out the asic
         opcodes is also straighforward, once I got it out of my head
         that G@ and G! might somehow be useful for something! I think
         they just threw 'em in as a trap.
 ---
  ~ EZ 1.26 ~ x

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