Date: Sun, 28 Sep 1997 17:33:37 -0700 (PDT) From: Simon Shapiro <Shimon@i-Connect.Net> To: Terry Lambert <tlambert@primenet.com> Cc: hackers@FreeBSD.ORG, (Tony Overfield) <tony@dell.com> Subject: Re: INB question Message-ID: <XFMail.970928173337.Shimon@i-Connect.Net> In-Reply-To: <199709282256.PAA18439@usr07.primenet.com>
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Hi Terry Lambert; On 28-Sep-97 you wrote: > > Port 0x18, on many systems, is an alias of port 0x08, which is > > the read-only DMA status register and the write-only DMA command > > register. Likewise, port 0x1A is often an alias of the write-only > > port 0x0A DMA mask register. > > Peachy. I suppose this was done "for no good reason", as usual in > PC hardware design. 8-(. At the time, it probably saved a nickel by saving some address latch. A nickel, times some millions is lots of money. What percentage of the profit it represents? Who cares. Greed is greed. > > Terry Lambert > terry@lambert.org > --- > Any opinions in this posting are my own and not those of my present > or previous employers. --- Sincerely Yours, Simon Shapiro Atlas Telecom Senior Architect 14355 SW Allen Blvd., Suite 130 Beaverton OR 97005 Shimon@i-Connect.Net Voice: 503.799.2313
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