24 messages in org.freebsd.freebsd-archMPSAFE TTY schedule [uart vs sio]| From | Sent On | Attachments |
|---|---|---|
| Ed Schouten | Jul 2, 2008 7:08 pm | |
| Takahashi Yoshihiro | Jul 3, 2008 1:49 pm | |
| Ed Schouten | Jul 3, 2008 8:52 pm | |
| Sam Leffler | Jul 3, 2008 9:41 pm | |
| Marcel Moolenaar | Jul 4, 2008 1:49 am | |
| Peter Jeremy | Jul 4, 2008 2:21 am | |
| Ed Schouten | Jul 4, 2008 9:22 am | |
| Peter Wemm | Jul 4, 2008 9:41 am | |
| M. Warner Losh | Jul 4, 2008 12:32 pm | |
| M. Warner Losh | Jul 4, 2008 12:36 pm | |
| M. Warner Losh | Jul 4, 2008 12:36 pm | |
| Takahashi Yoshihiro | Jul 4, 2008 1:12 pm | |
| Coleman Kane | Jul 4, 2008 2:57 pm | |
| Marcel Moolenaar | Jul 4, 2008 7:42 pm | |
| Marcel Moolenaar | Jul 4, 2008 7:50 pm | |
| Takahashi Yoshihiro | Jul 5, 2008 12:25 pm | |
| Marcel Moolenaar | Jul 5, 2008 4:04 pm | |
| Bruce Evans | Jul 6, 2008 3:04 pm | |
| Peter Jeremy | Jul 7, 2008 8:43 am | |
| Ed Schouten | Jul 8, 2008 2:16 pm | |
| Ed Schouten | Jul 13, 2008 7:22 am | |
| Ed Schouten | Jul 20, 2008 12:34 pm | |
| Giorgos Keramidas | Jul 20, 2008 6:46 pm | |
| Ed Schouten | Aug 8, 2008 3:55 am |
| Subject: | MPSAFE TTY schedule [uart vs sio] | |
|---|---|---|
| From: | Marcel Moolenaar (xcl...@mac.com) | |
| Date: | Jul 4, 2008 7:50:17 pm | |
| List: | org.freebsd.freebsd-arch | |
On Jul 4, 2008, at 6:10 AM, Takahashi Yoshihiro wrote:
In article <2008...@bsdimp.com> "M. Warner Losh" <im...@bsdimp.com> writes:
Do you need physical access? I have a pc98 machine I can put back on the network. It has the 8251 chip in it. It also has a 16550 part as well since it is a later model which had both...
I believe that uart works for the 16550 part, but haven't tried it lately...
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...
-- Marcel Moolenaar xcl...@mac.com