Date: Thu, 11 Jan 1996 21:53:03 -0500 (EST) From: Peter Dufault <dufault@hda.com> To: terry@lambert.org (Terry Lambert) Cc: terry@lambert.org, peter@jhome.DIALix.COM, hackers@FreeBSD.org Subject: Re: SCSI Scanner anybody? Message-ID: <199601120253.VAA04876@hda.com> In-Reply-To: <199601120237.TAA18956@phaeton.artisoft.com> from "Terry Lambert" at Jan 11, 96 07:37:01 pm
next in thread | previous in thread | raw e-mail | index | archive | help
> I thought that read remainder was a target mode thing; you'd know, you > did all the original scanner work, though. You mean residual lengths. That is independent and has to do with being able to detect the number of bytes sent when it doesn't match what you expect. You are bringing up a good point and I'm not sure which of our drivers support that. It isn't always needed - on the Optronics scanner they send a fixed control block that gives the details of the following data blocks (block size, number of full blocks and remainder) so you always know what to expect and can request the right amount for each transfer - that way they don't have to count on residuals working in all systems. -- Peter Dufault Real Time Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936 dufault@hda.com Fax: 508 433 5267
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199601120253.VAA04876>