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Catalogue of Arcade Emulation Software - the Absolute Reference

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X-Arcade

X-Arcade

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starshp1.c

0.62 [Frank Palazzolo, Stefan Jokish]


NOTES:

- "starshp1": Regular version, bonus time for 3500 points

- "starshpp": Possible prototype, bonus time for 2700 points


VIDEO HARDWARE NOTES:

- The range of sprite position values doesn't suffice to move the zoomed spaceship sprite over the top and left edges of the screen. These additional values are used to compensate for this. Technically, they cut off the first columns and rows of the spaceship sprite, but in practice they work like offsets in zoomed pixels.

- Some mysterious game code at address $2CCE is causing erratic images in the target explosion sequence. The following condition is a hack to filter these images.

- Starfield: The LSFR is reset once per frame at the position of sprite 15. This behavior is quite pointless and not really needed by the game. Not emulated.