Search found 2 matches

by OwlCube
Thu Apr 02, 2020 6:19 pm
Forum: Newbies
Topic: CPU sharing memory with my VGA card problem.
Replies: 5
Views: 1154

Re: CPU sharing memory with my VGA card problem.

Thank you [plural] for your replies!
Can you tell us a little more about these "registers" and "buffers" and how they work?
The registers are going to be TI 74374 and the buffers are the TI 74244.
The registers' inputs are going to be connected to the CPU, and the outputs are going to be connected ...
by OwlCube
Thu Apr 02, 2020 12:44 pm
Forum: Newbies
Topic: CPU sharing memory with my VGA card problem.
Replies: 5
Views: 1154

CPU sharing memory with my VGA card problem.

Dear 6502 Community;
I am currently making/designing a 256K computer using the 6502, and I was wondering if there was a simple way to share the same (banked) memory with the CPU and the VGA card.

The VGA card has a pixel frequency of ~25MHz, and the 6502 will work on ~13Mhz/~6Mhz.
I was planning ...