Stanislav, I'm replying to this and including the -hackers list, in the hope that someone can confirm this. Thanks for getting in touch. N On Thu, Apr 27, 2000 at 04:40:19PM +0200, Koschinsky Stanislav wrote: > 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. -- Internet connection, $19.95 a month. Computer, $799.95. Modem, $149.95. Telephone line, $24.95 a month. Software, free. USENET transmission, hundreds if not thousands of dollars. Thinking before posting, priceless. Somethings in life you can't buy. For everything else, there's MasterCard. -- Graham Reed, in the Scary Devil Monastery To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
