nesdev.org

This looks like a good way to observe the flags in action:
http://e-tradition.net/bytes/6502/

Interesting article on MCKid's development with a section on sloped collision:
http://games.greggman.com/game/programming_m_c__kids/

cover image: http://rand21althor.wordpress.com/2012/ ... nal-issue/

I've tested on fceux and it works there, i was just wanted to make sure that someone with the hardware could use it before i share it.

In response to AVGN's complaint about a lack of good Ninja Gaiden health GG codes i've created a no-damage GG code. Ninja Gaiden 1 (US) No Damage: AVZVGP If anybody can comfirm this does work on a real GG (n' US Cart) it would be much appreciated. AVGN's Ninja Gaiden video is great if you haven't se...

The zero flag is killed then LDA happens because the loaded value isn't zero, so it clears the zero (also is the equal) flag. Ok, thank you that clears it up! A lot of instructions will change flags that can be branched on. CMP is only needed when you want to compare two values against each-other w...

I've seen code with many Branch opcodes with without a Compare Opcode preceding it. I've done a little nesasm testing but i can't seem to pindown the logic behind 'delayed' branch commands. LDA #$88 CMP #$88 ;sprite is drawn LDA #$78 BEQ Skip JSR Draw_Sprite Skip: I would expect the comparison flag ...

I think i understand it now, thank you for the thorough explanations!

I'm having trouble exactly understanding what 'vector' means in nes asm/6502 terminology.
Is the vector for an IRQ like a pointer?

Is it closer to this?
http://en.wikipedia.org/wiki/Interrupt_vector

Or this?
http://en.wikipedia.org/wiki/Vectored_Interrupt

I thank you for your time.

Now this looks more like 'the goods':

http://www.ebay.com/itm/FAMILY-BASIC-Fa ... 53ec02df5c

Oh, to have a US edition of famicom basic back in 1987 would've been dreamy.

Often the right (sometimes accidental) combination of awkard 'sins' can make a game special and addicting. It's all a matter of context in my opinion.

Haven't posted here in awhile but i found this on ebay and though someone would dig it:

http://www.ebay.com/itm/NINTENDO-book-p ... 1170493632

Who knows how much actual detail it goes into...

Thank you for this tool Shiru! I can finally copy/paste in my photoshop pixel art verbatim (via graphics gale)... something i couldn't do in yy-chr.

tokumaru wrote:

Brickman wrote:

Code: Select all

// Set the low 8 bits of scroll.
PPU_SCROLL( 0, 0 );

Don't forget about PPU.ctrl (which was also in thefox's suggestion), it's also important.

Yeah, I had that implemented (from one of the KNES demo src's.)

Just for fun I also tried inline asm to just store the value at address 3F01 but that didn't work at all :) : That's because "STA $3F01" tries to store a value in the CPU addressing space, not the PPU addressing space. Always keep in mind that these two addressing spaces exist, and that t...