Date: Sun, 25 Jan 1998 03:25:46 +1030 From: Mike Smith <mike@smith.net.au> To: Donn Miller <dmm125@bellatlantic.net> Cc: emulation@FreeBSD.ORG Subject: Re: doscmd & vga (raw mode) Message-ID: <199801241655.DAA00414@word.smith.net.au> In-Reply-To: Your message of "Sat, 24 Jan 1998 07:06:14 -0000." <Pine.NEB.3.96.980124065259.190A-100000@myname.my.domain>
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This message should have been posted to the -emulation list (to which it has been redirected). > I had a question about doscmd... I know that raw mode isn't yet > supported, and neither is vga mode. Does it need to cooperate with > syscons via the libvgl interface, or does it directly access video memory > via the bios/other? There is no "vga mode" as such. Raw mode works by taking over the console from the console driver (like X does), and placing the video hardware directly in the hands of the DOS application. > Does raw mode work on BSDI? I tried executing a > self-displaying picture with doscmd -r picture.exe and got > doscmd: fatal error reading program text. What needs to be done to do > access VGA? Also, VGA should be doable under X, even though it would be > much tougher. What needs to be done, for raw mode: - The correct console ioctl() and mmap() calls need to be organised to switch into/out of raw mode. These are the console* functions in tty.c (and related gumpf). - Port I/O access needs to be provided to the video controller registers. - The video BIOS needs to be mapped into the process' address space, and its entry vectors dug up. VGA under X is quite doable, and probably not a lot tougher. > P.S. This is far fetched, but I thought I might even be possible to do a > non-vga (libvga, syscons) port of netscape since the sources are going to > be released soon. This could be tough. It would be excruciatingly difficult; you would have to effectively replace Motif with your own GUI library. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\
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