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Saturday, 20 May 2023

Galaxian getting close.

More Galaxian (though not a lot) progress and none on Xevious (again).

I've optimised the OSD layer somewhat and it should be adequate for real hardware (not that I've actually tried it yet). It's doing nothing anywhere near as demanding as Xevious, although I'm yet to implement the scrolling starfield. Having said that, the starfield should be a lot simpler than Xevious, in that I can utilise non-zoomed sprites and use wrap which means a single sprite update each scroll. I'll use colour cycling via palette update to blink the stars so again, not a lot more demanding than what is happening now.

The game is playable except for the few bugs that remain in the transcode. jotd is getting very close though, so it isn't too far off being finished. The big challenge for both the Amiga and the Neo Geo is the background 'swarm' sound effect, which changes frequency as you reduce the size of the swarm. I think jotd is going to take the same approach as will be necessary on the Neo Geo (at least without writing a custom sound driver), namely take a number of samples at different frequencies and play them back at the appropriate time.

No eye candy because it doesn't really look any different, just plays better.

Otherwise, no excuse not to get back to Xevious really...

UPDATE: another drop from jotd and it's looking very close now!

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