Date: Mon, 15 Apr 1996 06:20:21 +1000 From: Bruce Evans <bde@zeta.org.au> To: dk+@ua.net, phk@critter.tfs.com Cc: freebsd-hardware@FreeBSD.org Subject: Re: building parallel interface gadget - advice wanted Message-ID: <199604142020.GAA01207@godzilla.zeta.org.au>
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>> from my understanding, for the data byte t obe output into the (real) >> printer, it is necessary to assert select, !initialize and strobe >> bits of control register and then lower the signal on the strobe pin, >> leaving select and !initialize high. Can it be possible that the >> same situation unwantedly occurs during system reset (power-on, reset >> by switch, software-executed reboot, etc.)? >Not only possible, but also very likely. The parallel port is used by >man BIOS's as a status port for diagnostics early in the boot sequence. It shouldn't strobe any data out because that would waste paper. Bruce
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