Re: Generating Video Signals
Posted: Tue Jul 17, 2018 11:56 pm
cbmeeks wrote:
jmthompson wrote:
It outputs a 640x480 60 MHz signal,
I've also almost got the RAM sharing working; since I only need pixel data at most every 40 ns, and I've got 15 ns RAM, I've updated the design to basically behave as a 128Kx8 SRAM with a 40ns access time. VGA data is fetched on rising clock edges and CPU R/W cycles are executed on the falling edges. 40ns should be good enough for a CPU up to 12 MHz or so if my math is correct.