Subject: System hangs after BIOSCALL
To: NetBSD i386 Mailing List <email@example.com>
From: Brian Clough <Brian_Clough@phoenix.com>
Date: 10/16/2001 11:31:30
I'm having a problem when I use BIOSCALL to call Int10, function 4F02 (Set VESA
If I call other VESA BIOS functions at boot or runtime) there's no problem, and if
I call Set Mode during initialization it works too. Only if I call Set Mode at
runtime does the system hang.
Actually, after the call, the system continues for a short time then stops dead,
no error messages or anything. I can output characters to the console so that's
how I know it's returning after the set mode call. I do the actual BIOSCALL
inside an IOCTL in the video driver, then call the driver from an app. I get back
to the app, but when I do get back I don't have long to live.
I've got an ICE connected to the system, and I can see where execution is hitting
a HLT, but how can I find the corresponding location in the source code?
OS Development Group, Norwood, MA