Color video with SX52
cbmeeks
Posts: 634
Thought I would post an update to my NTSC color GPU.
galaxy.signaldev.com/~cbmeeks/gpu2/256_pixels_160_colors_diag.jpg
I am now up to 256 x 192 pixels with 160 colors (16 colors x 10 luma).
My question is about noise. I don't know if you can tell but I have wavy lines that run UP the display. They are worse when I transition from two different colors.
Any clues as to what might be causing that?
Thanks!
cbmeeks
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
http://metroidclassic.com
=========
DMCA Sucks
RIAA Sucks
galaxy.signaldev.com/~cbmeeks/gpu2/256_pixels_160_colors_diag.jpg
I am now up to 256 x 192 pixels with 160 colors (16 colors x 10 luma).
My question is about noise. I don't know if you can tell but I have wavy lines that run UP the display. They are worse when I transition from two different colors.
Any clues as to what might be causing that?
Thanks!
cbmeeks
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
http://metroidclassic.com
=========
DMCA Sucks
RIAA Sucks
Comments
I'm impressed. Very cool. The noise is most likely a 1 cycle error somewhere.
What are you using for RAM ?
Bean.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"SX-Video·Module" Now available from Parallax for only $28.95
http://www.parallax.com/detail.asp?product_id=30012
"SX-Video OSD module" Now available from Parallax for only·$49.95
http://www.parallax.com/detail.asp?product_id=30015
Product web site: www.sxvm.com
Those that would give up freedom for security will have neither.
·
No Ram just yet. Just incrementing color/luma values.
My next move is to draw from register memory....in otherwords, a scanline should fit into local RAM.
Then, I will pull from SRAM.
Right now, I only use 8 pins for the entire video bus so I will have plenty left over from the SX48/52 for parallel RAM.
cbmeeks
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
http://metroidclassic.com
=========
DMCA Sucks
RIAA Sucks