The selection of text/graphics mode is independent of the selection of the memory window. You can configure an EGA/VGA card to have a 128K address window which can be completely used for character/attribute bytes, using the complete plane 0 (64KB) for character codes and the complete plane 1 ( …

Thanks for the replies. The buffer is only the memory buffer. Only a portion of it is displayed so I don't need a 128x256 text mode. As I mentioned, I would use the offset and start address registers to tell the hardware what parts of the memory segment to display. "Back in the day " (~1994), I'm …

Thanks, I will play around with the tool. Yes, Mode Q does do that, but if I change it to only show a 160x144 window while in that resolution (using the same number of scanlines and horizontal pixel counts), it will only use a small part of the screen. The strange character mode idea was a way to: …

Hi all. I'm new here, but have long been a lurker. I will start this post my basic question and the provide more detail below in case y'all have other ideas on how I can accomplish my end goal. The basic question: I'm just getting into understanding the details of creating custom VGA modes. I …