Nestopia 1.47 overclocked

Discuss emulation of the Nintendo Entertainment System and Famicom.

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BZK
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Nestopia 1.47 overclocked

Post by BZK » Wed Jul 20, 2016 4:38 pm

Hello.

I've made an overclocked edition of nestopia 1.47 by setting cycles of all opcodes to zero.
Some games will have graphic or other problems, but you can still play games like Contra Force without any original lags.
Just use any of three .exe files to launch the emulator.

Have fun :wink:
Attachments
Nestopia 1.47 OC.zip
(2.84 MiB) Downloaded 519 times

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Dwedit
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Re: Nestopia 1.47 overclocked

Post by Dwedit » Wed Jul 20, 2016 4:48 pm

I'd think you'd get much better results if you made a hacked-up Dendy mode where frame rate runs at 60FPS instead of 50FPS. Then you mostly maintain game compatibility.

This would mean you have a lot more pre-vblank scanlines, but otherwise keep the same frame timing as NTSC. Only thing is that frequency sweeps, volume envelopes, and frame IRQs would run faster than NTSC.
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BZK
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Re: Nestopia 1.47 overclocked

Post by BZK » Thu Sep 08, 2016 3:52 am

update :D

Nestopia 1.4.7.0 - no overclocking
Nestopia 1.4.7.1 - minimum overclocking
Nestopia 1.4.7.2 - maximum overclocking

- emulator shows its version on servers
- option "no sprite limit" now works online
- if you've downloaded previous zip, you can just delete old exe and copy 3 new ones
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Nestopia 1.4.7.x.zip
(2.84 MiB) Downloaded 507 times

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MottZilla
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Re: Nestopia 1.47 overclocked

Post by MottZilla » Thu Sep 08, 2016 7:45 pm

FCEUX supports overclocking via additional scanlines. If I recall you can add scanlines to the vblank period or add extra post-render scanlines. I don't recall any sound issues from it but I didn't check.

In my own emulator I added an overclocking feature that changes the CPU:PPU ratio from 1:3 to 1:2 or 1:1 effectively making the CPU a whole lot faster.

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*Spitfire_NES*
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Re: Nestopia 1.47 overclocked

Post by *Spitfire_NES* » Fri Sep 09, 2016 1:31 pm

BZK wrote:update :D

Nestopia 1.4.7.0 - no overclocking
Nestopia 1.4.7.1 - minimum overclocking
Nestopia 1.4.7.2 - maximum overclocking

- emulator shows its version on servers
- option "no sprite limit" now works online
- if you've downloaded previous zip, you can just delete old exe and copy 3 new ones
Great work on this! Is the source available for this? Would like to take a peek at it, if possible. :beer:

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koitsu
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Re: Nestopia 1.47 overclocked

Post by koitsu » Fri Sep 09, 2016 1:36 pm

Nestopia is released under the GNU GPLv2 license, which means the source *must* be made available to the public (and not only on request).

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BZK
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Re: Nestopia 1.47 overclocked

Post by BZK » Wed Sep 21, 2016 12:55 pm

*Spitfire_NES* wrote: Great work on this! Is the source available for this? Would like to take a peek at it, if possible. :beer:
thanks.
here you go. you can open it with visual studio 2010.
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Nestopia 1.47 source.7z
(1.44 MiB) Downloaded 245 times

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