Nestopia 1.41 unofficial release:




1.41 for Win32 (March 29, 2010)
This is an unofficial maintenance release I created to fix an annoying joystick lag issue. This lag was particularly bad when VSync was enabled. The original Nestopia author (Martin
Freij) appears to have abandoned the official Nestopia project on SourceForge and has not responded to any of my e-mails, so I am left with no choice but to provide this unofficial release as a public service to the emulation community.


1. Removed manual option to set priority of Nestopia's main emulation loop thread. Instead, Nestopia now boosts its own process base priority AND its own main emulation thread priority whenever it is the active foreground window (and/or running in full-screen mode). This brings Nestopia much closer to real-time performance and responsiveness.

2. Removed some screwy input polling logic, and added some calls to input.Poll(), to ensure that the input devices are always polled immediately before the input state is utilized. This was the key change that got rid of most of the lag.

3. Removed some screwy input timing logic that was causing input polling to work only on certain clock intervals, rather than allowing it to work every time it was called.

(As far as I can tell on my own hardware configuration, these three changes taken together have completely eliminated the lag problems that have been present in Nestopia for several releases. Your mileage may vary.)

4. Updated the Visual Studio solution/project to build successfully under Visual C++ 2008 Express Edition.

5. Added this releasenotes.txt file and bumped the version number to 1.41.

- Keith Kelly (

i7-920 @ 3.2GHz
ATI Radeon HD 4890
Win7 RTM x64