RockNES emulator updates [v5.142 June 2nd 2014]

Discuss emulation of the Nintendo Entertainment System and Famicom.

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Zepper
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Re: RockNES emulator updates [v5.11 dec 31st 2013]

Post by Zepper » Mon Jan 06, 2014 6:25 pm

I'm sure it's a problem in the Allegro.

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Re: RockNES emulator updates [v5.12 Jan 13rd 2014]

Post by Zepper » Sun Jan 12, 2014 7:21 pm

Updated. See first post.

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tokumaru
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Re: RockNES emulator updates [v5.12 Jan 13rd 2014]

Post by tokumaru » Sun Jan 12, 2014 8:22 pm

Fixed $4016/17 reads, value must be ORed with $40.
ORing with $40 is a hack. Did you read what I and blargg wrote on that other thread? Instead of ORing with $40 you should emulate open bus.

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Re: RockNES emulator updates [v5.12 Jan 13rd 2014]

Post by Zepper » Mon Jan 13, 2014 6:31 am

Well, you see... PPU open bus is emulated and it has a test ROM. Now, the other CPU region hasn't open bus emulated properly. So, (address >> 8) & 0xE0 was a fix for a few NSFs not playing properly, for example. The Oring $40 is another case. Yup, I read the post.

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Re: RockNES emulator updates [v5.13 Jan 15th 2014]

Post by Zepper » Wed Jan 15, 2014 9:28 am

Code: Select all

 What's new for version 5.13 (01/15/2014)
 ----------------------------------------
 - New menu item "View CPU state", replacing the "Dump->CPU context".
 - New blitter, 256x240 interpolated. Press key 1, then 3.
 - Fixed Famicom Disk System support, a few games are playable now.
 - Fixed Refresh button in the disassembler dialogs.
 - Fixed a bug loading mapper 20 (Famicom Disk System).
 - The disassembler shows the full bank again (size of $1000).
 - Fixed a configuration problem of input devices.
 - Fixed flag for patched ROMs (it was always zero).
 - Added detection of dirty NES headers (DiskDude).
 - Internal optimizations, minor changes and fixes in the GUI.
For some bizarre reason, files are being erased from the server. I'm reuploading them when gone, but this is becoming boring.
I'll probably look for a new host.

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Eugene.S
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Re: RockNES emulator updates [v5.13 Jan 15th 2014]

Post by Eugene.S » Sat Jan 18, 2014 7:16 am

Bug#2
The "EXIT" and "GOT IT" buttons (misc -> screen resolution -> setup) need to be swapped

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Re: RockNES emulator updates [v5.13 Jan 15th 2014]

Post by Zepper » Sat Jan 18, 2014 8:12 am

Updated. Thanks for the report!

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Re: RockNES emulator updates [v5.13d Jan 19th 2014]

Post by Zepper » Sun Jan 19, 2014 7:46 am

I knew that my savestate had a problem. After testing VS SMB, I've found the problem. Data at $6000-$7FFF (PRG RAM) wasn't being saved/loaded correctly! A major fix.

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Re: RockNES emulator updates [v5.13d Jan 19th 2014]

Post by Eugene.S » Mon Jan 20, 2014 1:03 pm

Zepper,
The new blitter (256x240 interpolated) look like soft scanlines with flickering. It's interesting.
Can you add "Doubled size 512x384 interpolated" in future?

Bug#3:
The "-disable_ppu_clipping" option in RockNES.ini and the "disable ppu left clipping" GUI checkbox are mixed up.
When "-disable_ppu_clipping 1" checkbox is unchecked, and when "-disable_ppu_clipping 0" checkbox is checked

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Re: RockNES emulator updates [v5.13d Jan 19th 2014]

Post by Zepper » Mon Jan 20, 2014 3:54 pm

Eugene.S wrote:Zepper,
The new blitter (256x240 interpolated) look like soft scanlines with flickering. It's interesting.
Can you add "Doubled size 512x384 interpolated" in future?
Use triple buffering to remove flickering. I don't know about bigger screens in interpolated mode.. :(
Bug#3:
The "-disable_ppu_clipping" option in RockNES.ini and the "disable ppu left clipping" GUI checkbox are mixed up.
When "-disable_ppu_clipping 1" checkbox is unchecked, and when "-disable_ppu_clipping 0" checkbox is checked
Checking it... thanks.

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Re: RockNES emulator updates [v5.13d Jan 19th 2014]

Post by Eugene.S » Tue Jan 21, 2014 9:36 am

I think old "-blitter 4" was better than new.

RockNES 5.061 and earlier, "-video_resolution 640 480", "-blitter 4" on 1280x1024 display looks like:
Image Image

RockNES 5.07 and above, "-video_resolution 640 480", "-blitter 4" on 1280x1024 display looks like:
Image Image

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Re: RockNES emulator updates [v5.13d Jan 19th 2014]

Post by Zepper » Tue Jan 21, 2014 12:53 pm

Well, there's pixel interpolation in later versions. Not for early ones as you pointed out.
In other words, to stretch the image into 640 pixels, the 3rd pixel was being repeated (pattern AABBCCCAABBCCC..., A=1st, B=2nd, C=3rd pixel). Now, it's interpolated. ;)

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Re: RockNES emulator updates [v5.13d Jan 19th 2014]

Post by blargg » Tue Jan 21, 2014 3:10 pm

The interpolation in those screenshots has double-pixel mixed edges. It looks like you've expanded with interpolation some, then expanded that with nearest-neighbor even more. Unless you're going for full-on linear interpolation that looks blurry, you probably should be sure your expansion algorithm doesn't put more than one pixel of interpolation between pixel edges. In the fractional bilinear interpolation thread this is discussed more.

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Re: RockNES emulator updates [v5.13d Jan 19th 2014]

Post by Zepper » Tue Jan 21, 2014 6:09 pm

blargg wrote:The interpolation in those screenshots has double-pixel mixed edges. It looks like you've expanded with interpolation some, then expanded that with nearest-neighbor even more.
Almost. Take ABCD as 4 pixels. Expanded into 640p, they'll be AAiBBCCiDD, where i = (A+B)/2 in each RGB component.
Before this method, I used an easy AABBBCCDDD.

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Re: RockNES emulator updates [v5.13d Jan 19th 2014]

Post by blargg » Tue Jan 21, 2014 9:03 pm

In the screenshot you've got something like AAAiiBBBBiiCCCC. Note the double interpolation pixels. Before you were using nearest neighbor, so the second expansion (-blitter 4 I'm guessing does this) chained just fine with it; you still ended up with hard edges. But now since you're adding interpolated pixels, it looks bad when expanded. To solve this, you could do the extra expansion before the interpolation, add a single blitter that expands the NES 256x240 to the full output size, or add an option to use the old nearest-neighbor option so users like Eugene.S can get what they want.

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