It is currently Tue Oct 17, 2017 6:29 am

All times are UTC - 7 hours





Post new topic Reply to topic  [ 32 posts ]  Go to page Previous  1, 2, 3
Author Message
 Post subject: Re: Parallax scrolling
PostPosted: Fri May 06, 2016 9:44 am 
Offline
User avatar

Joined: Fri Jan 24, 2014 9:05 am
Posts: 131
Location: Hungary
That's the kind of agony I feel when I read comments like "the NES has 8 bits of memory".

But to actually contribute something to the topic, it's clear that CHR-ROM has a clear advantage when you need lots of tiles swapped quickly, or have multiple tilesets available per frame, but other than that...?


Top
 Profile  
 
 Post subject: Re: Parallax scrolling
PostPosted: Fri May 06, 2016 9:54 am 
Offline
User avatar

Joined: Sat Jul 25, 2015 1:22 pm
Posts: 501
It depends if you're contrasting CHR-ROM to bankswitched CHR-RAM, which is considerably more viable now than it was then. If you have bankswapping CHR-RAM, then the only real advantage I'd see for CHR-ROM is the option to use the second ROM slot so that you have more PRG-ROM available. However, there are a several advantages to using ROM over RAM in the traditional sense.

For starters, I'm sure Nintendo cut costs by not having more video RAM in their systems. This was a selfish, long-term play though that pushed the cost to software manufacturers.

Arcades used ROM for graphics, so that they could have more frames of animation quickly. NES can have a lot of frames of animation very quickly where some video RAM based consoles suffer at this.

Mid-screen graphic changes in general, are not possible without bankswapping. To bring it back to the topic of parallax scrolling, you can have multiple horizontal strips which draw from different background banks, and swap them while the screen is rendering. There is no way you could write tiles into CHR-RAM during that time.

Edit: I went back and reread and you listed most of the same advantages I did... but those can be big advantages! Graphics can push boundaries on the NES in ways they can't on many other systems, particularly in framerate.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 32 posts ]  Go to page Previous  1, 2, 3

All times are UTC - 7 hours


Who is online

Users browsing this forum: No registered users and 5 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group