[Coco] Inverting VDG text screen on a CoCo 1/2?

[L. Curtis Boyle]

On the regular VDG, there is no reverse video bit. So you have to use the inverted characters in the character set (ie POKE 1024+loc,0-63).

L. Curtis Boyle
curtisboyle at sasktel.net



> On Feb 15, 2023, at 10:43 AM, Allen Huffman via Coco <coco at maltedmedia.com> wrote:
> 
> I wrote a program to go through the 6847 T1 VDG text modes, which includes lowercase, changing the border, and inverting the screen.
> 
> I’ve seen programs on the CoCo (like GRABBER) that invert/reverse the screen in software, but the bits to do that on the T1 don’t seem to do anything on the 6847.
> 
> Does anyone know of a reference that would show me how to do this?  Thanks, much!
> --
> Allen Huffman - PO Box 7634 - Urbandale IA 50323 - 515-999-0227 (vmail/TXT only)
> http://www.subethasoftware.com - https://www.facebook.com/subethasoftware
> 
> 
> 
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