Monochrome modes have 1 bit per pixel... no byte alignment here! 4 bit standard was introduced when video memory was scarce, and cards had only 256k... Earl Truss wrote: > > ---------- > > From: David Gillett <[log in to unmask]> > > Subject: Re: [PCBUILD] only 16 colors with S3 trio 64+ > > Date: Monday, March 22, 1999 8:25 PM > > > > On 22 Mar 99, at 15:08, Earl Truss wrote: > > > > > Colors Number of bytes > > > 16 1 > > > > .5, actually. A vanilla VGA can do 16 colours at 640x480 resolution > > with only 256KB of installed video RAM (and some really gross interface > > programming, which is why you want the driver to take care of the > > details), and everybody emulates this as a "lowest common denominator". > > > But does it really only use 1/2 byte for each pixel? I would think this > would be pretty horrendous for the card to handle since most hardware works > on byte boundaries rather than trying to work on four-bit boundaries. > Maybe that's what you are talking about when you mention "really gross > interface programming"? > > I thought it more likely that the card is really running at EGA/VGA > resolution of 640x320 which can be done in 256K using a full byte for each > pixel. Once upon a time, 640x480 and anything above that was considered > "super VGA" resolution. > > PCBUILD's List Owner's: > Bob Wright<[log in to unmask]> > Drew Dunn<[log in to unmask]> Do you want to signoff PCBUILD or just change to Digest mode - visit our web site: http://nospin.com/pc/pcbuild.html