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 Forum: Homebrew Projects   Topic: Have a Homebrew? I'd like to help the world know it exists.

Posted: Thu May 12, 2016 8:20 am 

Replies: 9
Views: 2421


Hey friend! I'll probably go heavy on cart games, but i have no problem showing ROMs / community multicarts either. If it's postmarket for the NES, it has a place.

 Forum: Homebrew Projects   Topic: Have a Homebrew? I'd like to help the world know it exists.

Posted: Thu May 12, 2016 7:57 am 

Replies: 9
Views: 2421


Greetings everyone - I'm currently working on the documentary The New 8-bit Heroes, which is all about the post-market NES development community and a glimpse into the passion that goes into these projects. In short, if you have a game, I want to feature it. The film has gotten some great support fr...

 Forum: Newbie Help Center   Topic: Updating attributes already in the attribute table

Posted: Tue May 03, 2016 9:59 am 

Replies: 20
Views: 2967


Sorry - I debugged. It absolutely works. corrupted variable on my end...fixed and now flawless. :-)

You guys rock. Glad to know I wasn't *too* far off. Can't thank you guys enough for your constant feedback!

 Forum: Newbie Help Center   Topic: Updating attributes already in the attribute table

Posted: Tue May 03, 2016 8:12 am 

Replies: 20
Views: 2967


Thanks so much for all the help and explanation. This is *close* to working. It seemed to give a false positive. For instance, I directly loaded 20 84 respectively into the addr bytes and ran the routine. It worked exactly as expected. But then dropped 20 - 86 into the bytes, and got the same output...

 Forum: Newbie Help Center   Topic: Updating attributes already in the attribute table

Posted: Mon May 02, 2016 11:08 am 

Replies: 20
Views: 2967


Could, but using x and y in outer loop function...would have to store them to temp, restore them at end, continue the loop, or otherwise push them and restore them using the stack. This just seemed a little easier in context.

 Forum: Newbie Help Center   Topic: Updating attributes already in the attribute table

Posted: Mon May 02, 2016 7:35 am 

Replies: 20
Views: 2967


I know I'm incredibly close with this routine. Again, this is all happening during off-render time, so speed is not an issue. Here's what I've conceived, and here's the spot I can't seem to get right: GetAttAddress: LDA addr+1 LSR LSR CMP #$20 AND #%00000111 STA temp LDA addr ROL ASL ASL ASL ORA #$C...

 Forum: Newbie Help Center   Topic: Updating attributes already in the attribute table

Posted: Tue Apr 26, 2016 9:51 am 

Replies: 20
Views: 2967


This is slightly different than last topic, so I figured I'd start a new thread, even though it is related. Essentially, I'd like to update attributes on 'metatile' level (2x2 tiles, or 1 quadrant of the attribute byte). Thanks to the help here, I have been able to find the attribute block based on ...

 Forum: Newbie Help Center   Topic: Attribute / Tile

 Post subject: Re: Attribute / Tile
Posted: Sun Apr 24, 2016 8:57 am 

Replies: 19
Views: 2394


Yes sorry that was a mis-type. Hmm, alright I'll run through and make sure of all my byte agreements, and make sure there aren't any variables mucking things up. I appreciate your help and testing it out! *EDIT* Just a gremlin, I guess. Went through it line by line, couldn't find the issue. Erased a...

 Forum: Newbie Help Center   Topic: Attribute / Tile

 Post subject: Re: Attribute / Tile
Posted: Sun Apr 24, 2016 6:27 am 

Replies: 19
Views: 2394


Should nametableAttributesLo / Hi then give me the address to plug into 2006 to update the attribute? If so, this did not work. What I tried with the data was just wrote ntaLo to 2006, wrote ntaHi to 2006, and then wrote arbitrary values (#%01010101) to $2007 to see a change. There is no change. Con...

 Forum: Newbie Help Center   Topic: Attribute / Tile

 Post subject: Re: Attribute / Tile
Posted: Sat Apr 23, 2016 2:50 pm 

Replies: 19
Views: 2394


Actually not even for scrolling. Just for spot updates to first nametable when screen is turned off.

Just trying to figure out how to extrapolate the attribute address from the figured tile address. :-)

 Forum: Newbie Help Center   Topic: Attribute / Tile

 Post subject: Attribute / Tile
Posted: Sat Apr 23, 2016 1:59 pm 

Replies: 19
Views: 2394


Hey all - first, I completely understand the relationship of attributes to tiles, understanding how they sit at $23c0, and how they're organized. In a routine, however, I'm attempting to find the easiest way to find the attribute group associated with the a given 16bit tile address. I get that there...

 Forum: Newbie Help Center   Topic: Another division question -

Posted: Fri Apr 15, 2016 10:22 am 

Replies: 4
Views: 1084


You know - the more I think about it...I wonder if a division by four *could* actually be a base for an entire solution for what I need. Hm...even still, in the interest of knowing, I'd love to see that 16/8=16 r8 workup!

 Forum: Newbie Help Center   Topic: Another division question -

 Post subject: Another division question -
Posted: Fri Apr 15, 2016 10:19 am 

Replies: 4
Views: 1084


What would be the best method to divide a 16-bit number by an 8 bit number to get a 16 bit result? I've seen a lot about dividing 8 bit values by 8 bit numbers...and I have successfully worked on division of an 8 bit value that returns a 16 bit result (with the high byte being the integer and the lo...

 Forum: Newbie Help Center   Topic: Playing with division routine

Posted: Wed Apr 13, 2016 8:27 am 

Replies: 15
Views: 2215


*smacks head*......... yes. I'm sure it's the #$16. Ouch. That seems to have been it. Wow. That's almost too painful...hahahaha. *eyers are bleary* (and the 07ff writes were what i was plucking the writes to from the debugger....so i could read the output values both in a row...that's not where they...

 Forum: Newbie Help Center   Topic: Playing with division routine

Posted: Wed Apr 13, 2016 8:16 am 

Replies: 15
Views: 2215


I am mesmerized that this is still not giving me the right values. I'm even attempting to HARD CODE the values as part of the routine, and still getting weird results... I will type exactly what I have: Divide: LDA #$02 STA dividend LDA #$01 STA divisor LDA dividend STA quotient+1 LDA #$00 STA quoti...
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