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Catalogue of Arcade Emulation Software - the Absolute Reference

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epos.c

0.37b14 [Zsolt Vasvari]


TODO:

- Super Blob uses a busy loop during the color test to split the screen between the two palettes. This effect is not emulated, but since both halfs of the palette are identical, this is not an issue. See $039c. The other games have a different color test, not using the busy loop.


NOTES:

- Super Glob seems like a later revision of The Glob, the most obvious difference being an updated service mode.

- These games don't have cocktail mode.

- The divisor 4 was derived using the timing loop used to split the screen in the middle. This loop takes roughly 24200 cycles, giving 2500 + (24200 - 2500) * 2 * 60 = 2754000 = 2.75MHz for the CPU speed, assuming 60 fps and a 2500 cycle VBLANK period. This should be easy to check since the schematics are available, .

- I think theglob2 is earlier than theglob. They only differ in one routine, but it appears to be a bug fix. Also, theglob3 appears to be even older.


WIP:

- 0.96u2: Nicola Salmoria cleaned up the decryption in the Epos games.

- 26th June 2002: Zsolt Vasvari added a missing ROM to The Glob driver.

- 0.58: Fixed video/screen update (blue vertical line).

- 7th April 2001: Zsolt Vasvari sent in an EPOS driver for The Glob, Super Glob and IGMO.