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Internet Message Format  |  1992-12-15  |  993 b 
  1. Xref: sparky comp.sys.ibm.pc.hardware:33583 comp.os.msdos.programmer:11489
  2. Path: sparky!uunet!olivea!spool.mu.edu!tulane!uflorida!maple.circa.ufl.edu!X9999BVJ
  3. From: x9999bvj@maple.circa.ufl.edu
  4. Newsgroups: comp.sys.ibm.pc.hardware,comp.os.msdos.programmer
  5. Subject: Generating interrupts w/ parallel port
  6. Message-ID: <37957@uflorida.cis.ufl.edu>
  7. Date: 18 Dec 92 00:04:47 GMT
  8. Sender: news@uflorida.cis.ufl.edu
  9. Reply-To: X9999BVJ@oak.circa.ufl.edu
  10. Followup-To: comp.sys.ibm.pc.hardware
  11. Organization: Center for Instructional and Research Computing Activities
  12. Lines: 9
  13. Nntp-Posting-Host: maple.circa.ufl.edu
  14.  
  15.  
  16. I'm trying to write a bidrectional communications software program
  17. for the PC.  It needs to use the 4-bit input and 5-bit i/o registers
  18. to receive data.  Supposedly I can use an "active low" signal on
  19. ACK to generate an interrupt if bit 4 of the control register is
  20. set on.  I can't get this to generate the interrupt....any ideas
  21. or pointers to code?  Please respond via e-mail.
  22.  
  23. Brian
  24.