In article <29489C48-93A2-41D9-9EF1-5395A673A9B3_at_mac.com> Marcel Moolenaar <xcllnt_at_mac.com> writes: > > The uart probably works for some 16550 based devices but does not work > > for other one like multi-port devices. > > The design principle of uart(4) is that it does not know > about multi-port hardware. It controls a single serial > port only. For multi-port hardware you must have multiple > nodes on a bus or use an umbrella driver, such as puc(4), > quicc(4) or scc(4). Those drivers provide attachments for > every port. > > I suspect that support for multi-port devices is not to > hard to do on pc98... Many serial devices on pc98 use indirect I/O space, so resource management is quite complex. Therefore, it may need more work you think. At the starting point, I have added CBus frontend and fixed console support for pc98. http://home.jp.freebsd.org/~nyan/patches/uart_pc98.diff.bz2 --- TAKAHASHI Yoshihiro <nyan_at_jp.FreeBSD.org>Received on Sat Jul 05 2008 - 10:25:42 UTC
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