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Date: Thu, 4 Apr 1996 04:28:39 -0800 (PST)
From: Joerg Wunsch <joerg>
Message-Id: <199604041228.EAA24828@freefall.freebsd.org>
To: CVS-committers, cvs-all, cvs-sys
Subject: cvs commit:  src/sys/i386/isa lpt.c
Sender: owner-cvs-sys@FreeBSD.ORG
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joerg       96/04/04 04:28:38

  Modified:    sys/i386/isa  lpt.c
  Log:
  Work around a braindead signal handling in many newer HP printers.
  They don't have BUSY de-asserted by the time they ACK (and thus cause
  an interrupt).  The workaround is to try seeing if the BUSY will be
  de-asserted soon, and if not, to use an incremental backoff and
  semi-polled mode instead of the fixed timeout with 1/2 s we've been
  using previously (that caused the printer to run really slooow).
  
  Printers that have been working previously should not be affected by
  this.
  
  Revision  Changes    Path
  1.53      +26 -8     src/sys/i386/isa/lpt.c