Marcus, 

I'm sending this message to you primarily because you're the one with the 
technical knowledge to answer, and the list because it'll be good for 
archival purposes. 

When I first started working with NetBSD/Dreamcast, I asked about the video 
going off the edge of my TV screen; I believe you mentioned something about 
recompiling my kernel to fix it. Well, I looked at man options and wscons a 
bit, and figured that setting my display to 80x25 instead of 80x30 would do 
the trick; I tried compiling a new kernel with "options WSEMUL_80X25", and 
tried setting console 0 to 80x25 in /etc/wscons.conf. Neither seemed to 
work. 

Next, I figured I should take a look at the video driver, to see if there 
were any obvious variables I could tweak. Not being much more than a 
beginning C programmer, and knowing even less about how the OS files are 
laid out, I poked around until I found 
/usr/src/sys/arch/dreamcast/dev/pvr.c, which appeared to be the video driver 
(I was going from the line "pvr0 at shb0: 640 x 480, 16bpp, NTSC, composite" 
in dmesg). 

In there, I noticed a section commented as being for 60 Hz NTSC, and figured 
I was in the right place. I tried dropping the v_absolute_size variable by 
100 and recompiling my kernel; that caused my display to be unreadable. I 
set that back and tried dropping the vborder_stop variable by 50, and that 
didn't seem to do much, if anything. 

Am I even in the right neighborhood here? If not, what should I be doing? 
Any pointers would be greatly appreciated. 

Alex Kirk