Supermodel 0.3a svn 856

 SEGA Model 3 模擬器 Supermodel 發布新版，更新如下 :

r856

DSB2 clock speed from 4MHz to 11MHz.

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r855

New dumps added:

Virtua Striker 2 '99.1 (Step 1.5, Export, USA, Revision B)

Virtua Striker 2 '99.1 (Step 1.5, Japan, Revision B)

Thanks to Brian Troha and The Dumping Union

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r854

Fixed cycle counting overflow that was causing DSB2 to halt execution.

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r853

missing header

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r852

DSB2 IRQ 2 now fires at 1KHz rather than once per frame, improving 

music timing in Daytona USA 2 and Sega Rally 2. DSB1 CPU timing 

increased from 1MHz to 4MHz, improving music fade timing in Scud Race. 

Thanks to gm_matthew for these discoveries.

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r851

Just a few compile warnings

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