Date: Fri, 7 Feb 1997 07:03:27 +1100 From: Bruce Evans <bde@zeta.org.au> To: hackers@freebsd.org, pst@jnx.com Cc: bde@freebsd.org Subject: Re: serial ports at 230k Message-ID: <199702062003.HAA01985@godzilla.zeta.org.au>
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>Does anyone have any experience with running 16550A's at 230kbps under FreeBSD? >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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