zeeff@b-tech.UUCP (Jon Zeeff) (10/08/87)
I know that it's possible to change the border (the area at the edges of the screen, outside of where any text appears) color on the EGA. Does anyone have a code sequence that does this? -- Jon Zeeff Branch Technology, uunet!umix!b-tech!zeeff zeeff%b-tech.uucp@umix.cc.umich.edu
em445@uiucuxf.cso.uiuc.edu (10/13/87)
I thought you couldn't change the border color on EGA... If you get any
response on how to do it, please forward it to me, or post it on the net!
Thanks,
Eduardomcdonald@uxe.cso.uiuc.edu (10/13/87)
>/* Written 4:52 pm Oct 12, 1987 by em445@uiucuxf.cso.uiuc.edu in uxe.cso.uiuc.edu:comp.sys.ibm.pc */ >I thought you couldn't change the border color on EGA... If you get any >response on how to do it, please forward it to me, or post it on the net! >Thanks, > Eduardo >/* End of text from uxe.cso.uiuc.edu:comp.sys.ibm.pc */ You can change the border color by using the BIOS call to change all the palete registers at one time. However, the resulting border is so narrow that it doesn't fill the screen. Also on my real IBM monitor it makes the video drive circuits very unhappy, so that half of the screen changes shade. An article in (probably) PC MAgazine claimed that you could reprogram the video controller to get more overscan, and thus a real border, so long as the resultant slower scan rate didn't melt your monitor (a la melted monochrome monitors hooked to CGA cards!). Since I like black, I didn't save it. Anyone remember exactly how this works? Doug McDonald
mvolo@ecsvax.UUCP (Michael R. Volow) (10/14/87)
In the EGA utilities included in the programming section of PC Maga- zine in August 16 and Sept 16, 1986, they say that generally the bor- der in EGA screens can be changed; but then then they go on to talk about a few kludges which can approach this question (I've never tried it but it doesn't seem worth it). --Mike Volow, Psychiatry, Durham Veterans Administration Medical Center Durham, NC, 27712 919 383 3568 mvolo@ecsvax.UUCP
jagardner@orchid.UUCP (10/16/87)
first set AH = 10 ;hex AL = 1 ;means "set overscan register" BH = nn ;colour value to set overscan register to then do int 10H ;BIOS video interrupt there's also a way in CGA compatible modes that looks like AH = 0bH BH = 0 BL = nn int 10H but I've never tried it David Tanguay
nev@edison.GE.COM (Niles VanDenburg) (10/16/87)
In article <3632@b-tech.UUCP>, zeeff@b-tech.UUCP (Jon Zeeff) writes: > I know that it's possible to change the border (the area at the edges of the > screen, outside of where any text appears) color on the EGA. Does anyone > have a code sequence that does this? In theory there is a BBS at (212) 696-0360 for the PC Magazine's Interactive Reader Service and in theory the programs that may set the EGA border exist on this BBS but I have never been able to get on this BBS to confirm. In any case the software is fairly well documented (source etc) in the article "Exploring The EGA, Part I" in PC Magizine's Aug 1986 issue specifically on pages 378 through 384. In summary it involves some simple hacking on the EGA hardware registers and while I personally have not tried it it looks fairly straight forward (but then again I'm a bit of a EGA hacker also). Niles