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关于NSF的nmi信号问题
http://forums.nesdev.com/viewtopic.php?f=18&t=15641
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Author:  fogota [ Fri Mar 10, 2017 9:57 pm ]
Post subject:  关于NSF的nmi信号问题

有一个关于NSF的重大问题:
NSF播放器没有PPU,那么NSF播放器有没有60Hz的NMI信号呢?
那么有没有irq的信号来呢?
nsf播放器是怎样的硬件电路图呢?有谁知道?

Author:  lidnariq [ Fri Mar 10, 2017 11:31 pm ]
Post subject:  Re: 关于NSF的nmi信号问题

http://kevtris.org/Projects/hardnes/ ? http://www.elektroda.pl/rtvforum/topic3108894.html ? https://sites.google.com/site/nyanfc/ ?

The exact time source or interrupt source for the NSF is not specified; a hardware implementation could use a Programmable Interval Timer such as the 8254 hooked up to either input.
(google: 未指定NSF的确切时间源或中断源; 硬件实现可以使用可编程间隔定时器,例如8254连接到任一输入。)

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