Date: Thu, 06 Feb 1997 12:52:13 -0800 From: Paul Traina <pst@jnx.com> To: Bruce Evans <bde@zeta.org.au> Cc: hackers@freebsd.org, bde@freebsd.org Subject: Re: serial ports at 230k Message-ID: <199702062052.MAA00639@base.jnx.com> In-Reply-To: Your message of "Fri, 07 Feb 1997 07:03:27 %2B1100." <199702062003.HAA01985@godzilla.zeta.org.au>
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Good guess, but I'm actually trying out a 3COM ISDN TA that runs at 230k. From: Bruce Evans <bde@zeta.org.au> Subject: Re: serial ports at 230k >Does anyone have any experience with running 16550A's at 230kbps under FreeB >>SD? >Yes, I know, the driver doesn't support it currently, but has anyone played? Not me. I checked the PC16550D specs recently. The maximum speed is 1.5Mbps like I remembered. If you only care about remote gdb throughput to an sio port on a FreeBSD host, note that the protocol is non-streaming so it is limited to 1 packet per clock tick (30Kbps effective throughput at best) by the host's pseudo-DMA timeout routine. Bruce
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