Wow, many thanks for the analysis, I'm impressed! I'll try to build a patching DISPLAY asap.
Aitor 2006/10/16, Joris van Rantwijk <[EMAIL PROTECTED]>: > Hello Aitor, > > Aitor Santamaría wrote: > > Perhaps you could try 850 or 858, at least one of them should be there > > (850 is the western european typical codepage, 858 is the same but > > with the Euro sign). > > I tried all three codepages, and none of them work. > Although in Qemu, with CON=(EGA,,1), all three codepages work. > > After reading bits of assembler code and bits of CPI file, I have a > theory that may explain the situation: > > - The CGA specific driver initializes the global variable wNumSubFonts > to 1 (see display/egavga/cgaega.asm line 239). > - The font-reading code takes this as a signal that it should only > consider the first subfont in a codepage. If that first subfont is not > of correct size, it assumes that the whole codepage is screwed (see > display/egavga/egar.asm lines 302 and further). > - But in EGA.CPX the first subfont is size 16, followed by size 14, > followed by size 8. So the font reader gives up before it finds the > subfont of the right size. > > ... Wow! I just found some evidence in support of the above theory. With > a binary patch to DISPLAY.EXE, to make it skip over nonsupported > subfonts, it is now able to load the codepage on CGA. > > I can now also confirm that GRAFTABL emulation works; I can see the > linedrawing characters in graphics mode :-). Of course the codepage does > not affect CGA text mode, but it works for graphics. Oh I've never seen > such an ugly euro sign ;-) > > Bye, > Joris. > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > _______________________________________________ > Freedos-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freedos-devel > ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Freedos-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freedos-devel
