Date: Fri, 23 Aug 1996 12:19:22 +0930 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: rgrimes@GndRsh.aac.dev.com (Rodney W. Grimes) Cc: msmith@atrad.adelaide.edu.au, pjchilds@imforei.apana.org.au, se@zpr.uni-koeln.de, freebsd-hardware@FreeBSD.org Subject: Re: ASUS SC200 SCSI card? Message-ID: <199608230249.MAA18494@genesis.atrad.adelaide.edu.au> In-Reply-To: <199608230301.UAA13429@GndRsh.aac.dev.com> from "Rodney W. Grimes" at Aug 22, 96 08:01:42 pm
next in thread | previous in thread | raw e-mail | index | archive | help
Rodney W. Grimes stands accused of saying: > > > > Even with two 810's coming up for an opcode every us? I'd have > > thought you'd want to allow for (max latency + one opcode fetch) < 1us > > so that the second one didn't starve... > > Even with 6 of them.... the latency time just says if someone else wants > the bus I can't use it for more than a total of 32 clocks, the NCR should > be buffering enough of its opcodes for this to not be a problem. Ah. I wasn't aware that it prefetched; I thought the whole issue with pulling the latency back to 32 was to make it possible for the 810 to grab the bus for each opcode. I must admit that it makes more sense this way. > Rod Grimes rgrimes@gndrsh.aac.dev.com -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] Collector of old Unix hardware. "Where are your PEZ?" The Tick [[
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199608230249.MAA18494>