🚀 go-pugleaf

In article <1992Oct28.110614.6898@proto.com> joe@proto.com (Joe Huffman) writes:
>
>For mode 105h, it is just put it into that mode, then write one byte for
>each pixel.  Don't worry about 'write modes' and I/O ports and registers.
>
>Get the VESA standard... it is a big help and it is free.
>

Thanks for the help, Joe.  It solved my problem right away.  I'll definitely
get the VESA standard, too.

In the meantime, though, I have another question for you or anyone else.
Int 4f01h (Return SVGA Mode Information) tells me how many bitplanes
each mode uses:
     100h : 1 bitplane
     101h : 1
     102h : 4
     103h : 1
     104h : 4
     105h : 1
 
Am I correct in assuming that for those modes with only one bitplane
I just set the mode and write one bit per pixel, as described above?
And for those with multiple bit planes I need to set the video mode
and write mode, and write thru the bit mask?

I have a book that gives a little information on VESA.  It says that
different video cards implement the standard in different ways- so
don't assume that what works on one card will work on others.  The
book says you must get the info from int 4f01h to find out how
the video card implements the specifics of each SVGA mode.  Is this
true?  Does that mean that the above info is correct for only some
video cards?


Thanks in advance for any help.

Scott Lewis
cslewis@vesta.unm.edu


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Scott Lewis
cslewis@vesta.unm.edu
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