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

Allen Huffman alsplace at pobox.com
Wed Feb 15 11:43:39 EST 2023

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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