Date: Tue, 4 Jun 1996 17:47:51 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: james@miller.cs.uwm.edu (Jim Lowe) Cc: terry@lambert.org, FreeBSD-current@FreeBSD.org, fcurrent@jraynard.demon.co.uk, grog@lemis.de Subject: Re: Vm fixes NG Message-ID: <199606050047.RAA27881@phaeton.artisoft.com> In-Reply-To: <199606041921.OAA16941@miller.cs.uwm.edu> from "Jim Lowe" at Jun 4, 96 02:21:22 pm
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> > > Syscons seems to be able to do this just fine via <cntl><alt><fx>. It > > > would sure be nice to be able to drop into the debugger when running X > > > w/o having to switch to another virtual console first. > > > > The only fix would be for *all* graphic modes to be settable *only* > > through the console driver, so that the console driver can unset > > them without having to ask a user space program to do it for it. > > I didn't realize that the X server was the one actually doing this. > I don't think it is necessary for *all* graphics modes to be settable > *only* through the console driver. Dropping the X server into the > kernel seems like a big waste of space -- but I guess it is an option :-). Which is why you would only drop the DDX into the kernel, not the whole server, and dynamically load per-card DDX implementations other than generig VGA on an as-needed basis. > It should be possible to download two code segments to syscons when X > starts up for each particular card (or X-server). This code sequence would > be ``put me into default mode'' and ``put me into graphics mode''. Sorry, but there are gate-enable/gate-disable sequences that must be executed in order, especially for the Mach 32/64 cards. It won't work without putting more code for an interpreter than it would take to put the generic VGA DDX code down there. > Of course, the X server would have to update the ``put me into graphics mode'' > when you used <ctl><alt><+,->, but that wouldn't be a big deal. In any case, > it is certainly do able without teaching syscons everything that X > knows. All syscons really needs to know is how to switch modes back and > forth. And all the DDX code needs to do is provide a fame-buffer style interface with certain drawing primitives abstracted for use by X, MGR, DOS emulation, Mac emulation, VGA lib, etc., etc.. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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