Date: Tue, 04 Jun 1996 22:39:31 -0700 From: "Michael L. VanLoon -- HeadCandy.com" <michaelv@HeadCandy.com> To: "Brett Glass" <Brett_Glass@ccgate.infoworld.com> Cc: freebsd-hardware@freebsd.org Subject: Re: Hayes ESP Message-ID: <199606050539.WAA25402@MindBender.HeadCandy.com> In-Reply-To: Your message of Tue, 04 Jun 96 18:47:04 -0800. <9605048339.AA833939625@ccgate.infoworld.com>
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>> The version 1 cards were really pretty bogus from what I understand --
>> they would only support speeds up to 57600, and had some other weird
>> limitations.
>Don't know about any speed limitations, but we have one at LARIAT that's
>working fabulously under FreeBSD. We configure our serial ports at 38.4 to
>provide a little breathing room, and with at least 1K of buffering on each
>port, it's unloading the system. The automated RTS/CTS handshaking is a
>boon.
Oh, I remember the other thing... The version 1 cards had gross
specific demands on how fast you could send data to the advanced
programming registers. You had to spin and wait on a status register
when writing to or reading from those registers -- if you shoved stuff
in too fast, I believe it got unhappy. From what I understand, the
version 2 cards don't display this "feature".
It's been over a year since I studied this stuff, so apologies if my
details are a little sketchy...
>> All the Hayes ESP cards I have personally seen are version 2,
>> including both of the cards I own.
>Is this the one with the Bizcom UART on it?
I have no idea. I don't remember seeing anything saying Bizcom, and
the "main" chip has a Hayes logo on it. But, it's been several weeks
since I've actually looked at the card....
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Michael L. VanLoon michaelv@HeadCandy.com
--< Free your mind and your machine -- NetBSD free un*x >--
NetBSD working ports: 386+PC, Mac 68k, Amiga, Atari 68k, HP300, Sun3,
Sun4/4c/4m, DEC MIPS, DEC Alpha, PC532, VAX, MVME68k, arm32...
NetBSD ports in progress: PICA, others...
Roll your own Internet access -- Seattle People's Internet cooperative.
If you're in the Seattle area, ask me how.
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