On Wed, 21 Apr 2021 09:19:42 +0200, Gerd Hoffmann wrote: > > > > However, a tricky part is that the QEMU vga code does treat VGA_ATT_IW > > > register always as "flip-flop"; the first write is for index and the > > > second write is for the data like palette. Meanwhile, in the current > > > bochs DRM driver, the flip-flop wasn't considered, and it calls only > > > the register update once with the value 0x20. > > > > > > > Unless bochs does things very different, the index should first be reset by > > reading 0x3da. Then write the index, then the data. > > > > https://web.stanford.edu/class/cs140/projects/pintos/specs/freevga/vga/vgareg.htm#attribute > > bochs should follow standard vga logic here. > Also a bochs_set_blank(true/false) helper function probably makes sense. OK, I factored it out to bochs_hw_blank() in v2 patch. thanks, Takashi _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
