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There would be no way to detect when DMC is reading. It would happen multiple times a frame, and can happen any time.

About your code, calima. In display.sinc You should have reserved 2 bytes for SPR_XOFF, since you reference SPR_XOFF+1. It works without issue, because SPR_YOFF is defined immediately below it, and never used. example. SPR_XOFF: .res 2 https://github.com/clbr/neslib/blob/master/display.sinc I'm goin...

metasprites scrolling offscreen

Funny you mention that. I was just working on code that would do just that. Still thinking about it, though.

Especially, large metasprites that just POP on screen instead of smoothly entering the screen is something that bothers me.

anything from 00 to 7f is positive and 80 to FF is negative?

Yes. Because then you can use the N flag to control flow. BMI and BPL.

And FF is assumed to be -1. For example, an object just off the screen to the left. If it's moving right, eventually it's position will wrap back to 0, on screen.

The background can be represented by a byte array, that represents collision boxes to what you see on screen. with 16x16 boxes, you should fit 16 wide and 15 high on a screen. 240 bytes. you only need 4 bits from X and Y each to know which block you are in. LDA Sprite_Y and #$f0 STA temp LDA Sprite_...

Another new user with 1 post.

X is these bits of a nametable address 0000000 00011111 Y is these bits 00000011 11100000 these bits determine which nametable 00001100 00000000 this bit is always set 00100000 00000000 so...to get X... lda AddrLo asl a asl a asl a sta Sprite_X ...and to get Y... lda AddrLo and #$e0 ;mask off X bits...

I find the transcript a bit offensive. I comes across like "I need these experts in a niche technology field to help me... and what a bunch of nerds"

Sorry. We all can't be Matt Damon.

You can use RAM addresses as counters.

LDA #5
STA counter
loop:
do stuff
DEC counter
BNE loop

Big "culture shock" this month. nesdev changed. nintendoage is gone. Feels weird.

I see it. board style.

I don't see how to change to dark theme.

I keep a copy of all attribute bytes in RAM. Both nametables. That way I don't have to re-fetch / recalculate every single bit.

You could look at the Mario's Right Nut tutorials, now at videogamesage

I don't think you can make a big game with CNROM. Only a small game. It's the PRG ROM size that will prevent you from having much level data... or boss AI.

For a larger game I would use MMC1 or MMC3.