Date: Sun, 20 Feb 2000 20:19:47 +0100 (CET) From: hm@kts.org (Hellmuth Michaelis) To: arg@arg1.demon.co.uk (Andrew Gordon) Cc: dfr@nlsystems.com, current@freebsd.org, freebsd-isdn@freebsd.org Subject: Re: Big ATA problems Message-ID: <20000220191947.A58381F17@bert.kts.org> In-Reply-To: <Pine.BSF.4.21.0002201751190.20100-100000@server.arg.sj.co.uk> from Andrew Gordon at "Feb 20, 2000 6:17:29 pm"
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Andrew Gordon wrote: > On Sun, 20 Feb 2000, Hellmuth Michaelis wrote: > > > > A typical isic hardware has an ISAC and an HSCX chip onboard. The ISAC > > chip does the D-channel handling and uses offsets 0-0x2b and 0x30-0x3b, > > the HSCX (B-channels) uses offsets 0-0x3b and 0x40-0x73. > > But in the case of the teles16.3, it does _not_ use offsets 0x00-0x3b in > the HSCX or ISAC: the ASIC on the card has 'folded' the address space so > that the fifo appears at an address 3 bytes after the last register (0x3e > with the current scheme - see tels0163_read_fifo()). Oh yes, you are right! I was (and am still a bit) confused. So it uses 0x20-0x3e for the ISAC and 0x20-0x3e and 0x60-0x7e for the HSCX and at least three bytes at its base address, right ? This makes sense. Now the real question left is are this the only locations where the card is driving the bus ? hellmuth -- Hellmuth Michaelis hm@kts.org Hamburg, Europe We all live in a yellow subroutine, yellow subroutine, yellow subroutine ... To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isdn" in the body of the message
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