Date: Thu, 27 Apr 2000 16:40:19 +0200 From: "Koschinsky Stanislav" <stanislav.koschinsky@univ-troyes.fr> To: <doc@freebsd.org> Subject: Maybe need to be corrected? Message-ID: <000801bfb056$939ed800$f6e632c1@univtroyes.fr>
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This is a multi-part message in MIME format. ------=_NextPart_000_0005_01BFB067.462AE6C0 Content-Type: text/plain; charset="koi8-r" Content-Transfer-Encoding: quoted-printable Hello! My name is Stanislav Koschinsky. I've read the part of FreeBSD book 21.3 "DMA: What it is and how it = works". I like it very much. But I suppose that there is a mistakes (or = misprints maybe) in descriptions of "DMA Address and Count Registers" = and "DMA command registers". The numbers of registers does not = correspond ones that are in the description of IBM compaitible XT = computer. (DMA Registers: 0x2, 0x4, 0x6 etc.) I think there should be something like this: 0x0 write/read Channel 0 starting/current address 0x2 write/read Channel 1 starting/current address 0x4 write/read Channel 2 starting/current address 0x6 write/read Channel 3 starting/current address 0x1 write/read Channel 0 starting/remaining byte count 0x3 write/read Channel 1 starting/remaining byte count 0x5 write/read Channel 2 starting/remaining byte count 0x7 write/read Channel 3 starting/remaining byte count 0x8 write/read command register 0x9 write request register ... Please, verify the numbers. With best regards, S.Koschinsky. e-mail: koschinsky@univ-troyes.fr ------=_NextPart_000_0005_01BFB067.462AE6C0 Content-Type: text/html; charset="koi8-r" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content=3D"text/html; charset=3Dkoi8-r" http-equiv=3DContent-Type> <META content=3D"MSHTML 5.00.2314.1000" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>Hello!</FONT></DIV> <DIV><FONT face=3DArial size=3D2>My name is Stanislav = Koschinsky.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>I've read the part of FreeBSD book 21.3 = "DMA: What=20 it is and how it works". I like it very much. But I suppose that there = is a=20 mistakes (or misprints maybe) in descriptions of "DMA Address and Count=20 Registers" and "DMA command registers". The numbers of registers does = not=20 correspond ones that are in the description of IBM compaitible XT = computer.=20 (DMA Registers: 0x2, 0x4, 0x6 etc.)</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I think there should be something like=20 this:</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>0x0 write/read Channel 0 = starting/current=20 address</FONT></DIV> <DIV><FONT face=3DArial size=3D2>0x2 write/read Channel 1 = starting/current=20 address</FONT></DIV> <DIV><FONT face=3DArial size=3D2>0x4 write/read Channel 2 = starting/current=20 address</FONT></DIV> <DIV><FONT face=3DArial size=3D2>0x6 write/read Channel 3 = starting/current=20 address</FONT></DIV> <DIV><FONT face=3DArial size=3D2>0x1 write/read Channel 0 = starting/remaining=20 byte count</FONT></DIV> <DIV><FONT face=3DArial size=3D2>0x3 write/read Channel 1 = starting/remaining=20 byte count</FONT></DIV> <DIV><FONT face=3DArial size=3D2>0x5 write/read Channel 2 = starting/remaining=20 byte count</FONT></DIV> <DIV><FONT face=3DArial size=3D2>0x7 write/read Channel 3 = starting/remaining=20 byte count</FONT></DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2>0x8 write/read command = register</FONT></DIV> <DIV><FONT face=3DArial size=3D2>0x9 write request register</FONT></DIV> <DIV><FONT face=3DArial size=3D2>...</FONT></DIV> <DIV><FONT face=3DArial size=3D2>Please, verify the = numbers.</FONT></DIV> <DIV> </DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2>With best regards,</FONT></DIV> <DIV><FONT face=3DArial size=3D2>S.Koschinsky.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>e-mail: <A=20 href=3D"mailto:koschinsky@univ-troyes.fr">koschinsky@univ-troyes.fr</A></= FONT></DIV> <DIV> </DIV></BODY></HTML> ------=_NextPart_000_0005_01BFB067.462AE6C0-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-doc" in the body of the message
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