Games which display attribute tables?

Dwedit · Post by **Dwedit** » Thu Jan 29, 2009 1:22 pm

Besides Teenage Mutant Ninja Turtles, Slalom, and Super Mario 3, what other games display the attribute tables?

Celius · Post by **Celius** » Thu Jan 29, 2009 3:34 pm

What do you mean by "display"?

tokumaru · Post by **tokumaru** » Thu Jan 29, 2009 4:26 pm

Celius wrote:What do you mean by "display"?

If you manually set the vertical scroll to values larger than the name table (240-255), the PPU treats attribute table data as if it were name table data. I think this is what he's talking about. I wasn't aware that games had actually used that though. How do the listed games make use of that "feature"?

Dwedit · Post by **Dwedit** » Thu Jan 29, 2009 4:46 pm

Slalom uses it to display a row of black pixels above the top status bar.
Teenage Mutant Ninja Turtles and Mario 3 just have graphical glitches being displayed. You can see "51" partially displayed on TMNT's title screen in the very top row, and some graphics garbage at the top of the screen in the sidescrolling areas. Super Mario 3 displays some junk during the title screen after Luigi whacks the top of the screen and causes the screen to shake, it's using negative scroll values causing attribute tables to be drawn at the top.

Bregalad · Post by **Bregalad** » Fri Jan 30, 2009 2:46 am

Most of them display that in the "hidden" top 8 rows I guess. We have yet to find a game that actually relies on that feature to display proper graphics on the palyfield. I guess by having all 4 BG palettes identical you could use that feature to extend the playfield to become 32x32 instead of 32x30.

ahefner · Post by **ahefner** » Sat Feb 07, 2009 7:23 pm

Arkista's Ring uses a negative scroll when you've walked to the top of the level.