consp12@bingsuns.cc.binghamton.edu (David Hoelzer) (09/06/90)
Ok.. Here's a good one.. I keep hearing about all of these undocumented VGA modes.. Does anyone out there have any documentation on any of these modes. Especially a hiresolution 256 color mode and the 43 line mode.. Thanks consp12@bingvaxu.cc.binghamton.edu consp12@bingsuns.cc.binghamton.edu
toma@tekgvs.LABS.TEK.COM (Tom Almy) (09/07/90)
In article <3942@bingvaxu.cc.binghamton.edu> consp12@bingsuns.cc.binghamton.edu (David Hoelzer) writes: >Ok.. Here's a good one.. I keep hearing about all of these >undocumented VGA modes.. Does anyone out there have any documentation >on any of these modes. Especially a hiresolution 256 color mode and the >43 line mode.. I don't know about the hires 256 color mode, but the 43 line mode (or better 50 line mode) are documented: Do this for 43 lines: mov ax, 1201H ; select 350 scan lines mov bl, 30H int 10H Then do this for either 43 or 50 lines: mov ax, 0003H ; select mode 3, and sets scan lines int 10H mov ax, 1112H ; load 8x8 font mov bl, 0 int 10H mov ax, 1200h ; load better printscreen routine mov bl, 20h int 10H To return to standard mode, mov ax, 1202h ; restore 400 lines (if was in 43 line mode) mov bl, 20h ; otherwise you get EGA resolution 80x25 int 10h mov ax, 0003h ; select mode 3 int 10h Tailor as necessary for high level languages. Tom Almy toma@tekgvs.labs.tek.com Standard Disclaimers Apply