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- Newsgroups: comp.os.linux
- Path: sparky!uunet!mcsun!news.funet.fi!funic!nntp.hut.fi!nntp!jem
- From: jem@vipunen.hut.fi (Johan Myreen)
- Subject: Re: Major/Minor numbers
- In-Reply-To: jwinstea@fenris.claremont.edu's message of Sat, 12 Sep 1992 01:34:48 GMT
- Message-ID: <JEM.92Sep12175202@vipunen.hut.fi>
- Sender: usenet@nntp.hut.fi (Usenet pseudouser id)
- Nntp-Posting-Host: vipunen.hut.fi
- Organization: Helsinki University of Technology, Finland
- References: <1992Sep11.025738.8738@athena.mit.edu> <richard.716248564@stat.tamu.edu>
- <1992Sep12.013448.13445@muddcs.claremont.edu>
- Date: 12 Sep 92 17:52:02
- Lines: 41
-
-
- >>mouse 10, 0 c bus mouse
- >>psaux 10, 1 c ps/2 mouse
- >
- >Actually, the last draft of the device-naming standard I saw from the
- >Linux Standards list had /dev/bm = 10,0. I think this should be
- >updated to:
- >
- >bm-l 10, 0 c logitech bus mouse
- >bm-p 10, 1 c ps/2 mouse
- >bm-m 10, 2 c microsoft bus mouse
-
- If I have understood the meaning of the words "bus mouse" correctly,
- they stand for a type of mouse which connects to the computer via an
- expansion board, which you plug into a bus slot.
-
- A PS/2 mouse is *not* a bus mouse, you connect it into a connector
- which goes to the "Keyboard/Auxiliary Device Controller". This is the
- name IBM's Technical Reference uses, and that's why I called the
- device /dev/psaux. The interface is specifically meant for pointing
- devices, but is not restricted to mice, which is why they don't call
- it a mouse port. It is mechanically and electrically similar to the
- keyboard interface, and they share input and output registers in the
- keyboard controller.
-
- This kind of interface was introduced with IBM's PS/2 line of
- computers, so you won't find it on an AT. But it is quite popular on
- newer non-MCA machines too, and not only on machines made by IBM.
-
- Conclusion: I don't think the PS/2 mouse should be called bm-p.
- However, I am open to new suggestions if 'psaux' isn't ok. How about
- 'psmouse' or 'psm'? Personally, I don't like 'ps2mouse' or 'ps2m',
- because they look stupid with that digit in the middle.
-
- It would also be more logical if the similar Microsoft and Logitech
- bus mice would be grouped together as 0 and 1, and the PS/2 mouse
- would use minor number 2. But it is perhaps too late to change that?
-
- --
- Johan Myreen
- jem@cs.hut.fi
-