The MSX-version of Gradius-2 (a.k.a. Nemesis 2) is a spin-off story of the Gradius series, developed specifically for the MSX and later ported to X68000 and PSP under the title "Nemesis 90 Kai". As with many other Konami megarom titles for MSX, it suffered from the bug in the timing routine that lets it run at twice its normal speed if the processor is fast enough. Also, the game is far too CPU-intensive for a standard 3.57MHz Z80A to sustain a full frame rate. As a result, the game drops frames constantly, running noticeably slower than its predecessor: Gradius (a.k.a. Nemesis).
This new patch is not just the same as previous ones. It will not only implement the DynamicVsync (for MSX1 & MSX2), many speed optimizations and some tricks: it also includes a much-desired feature: SmoothScroll for MSX2+ and MSX Turbo-R!
In addition, sd_snatcher released a new version of the Salamander DynamicVsync patch, that includes some new optimizations to get even better speed improvements on slower machines.
Relevant link: Gradius 2 enhancement patch
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