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Galaga '88

0.36b4 [Ernesto Corvi, Tatsuyuki Satoh]

0.35b5 [Ernesto Corvi]


Bugs:

- Most of the time the shooting accuracy shown on the screen when the game is over is not computed correctly. It's hard to explain, so I made a slew of screen shots with different levels of shots fired, the problem appears to begin "Number of Hits" level is in the 60's... Followup: I did a bit more followup on this bug - it was introduced in MAME 0.89. In the last update before 0.89, there was huge work on Namco System 1 by Nicola Salmoria in which romsets for galaga88 were removed/changed: Follow-up by Haze: It's a bug in the emulation of the protection device. I've tracked it down, and know what's wrong. I'm just trying to figure out the best way to fix it without breaking other things. Basically the current implementation of the protection device simulation supports a 16bit / 16bit divide operation, however, galaga88's score calculation requires a 32-bit / 16 bit operation. It writes the first set of registers twice to write the 32-bit number, at the moment the first writes are ignored, only the second 16-bit is used. When you go above the 65 hits / 100 shots type stats the first value goes above 0xffff, and becomes a 32-bit number (>0x000010000) because MAME ignores the first part it ends up doing something like 0x0030 / 0xYY instead of 0x00010030 / 0xYY, thus giving the incorrect %. galaga88_0109u4gre Tafoid / Haze


WIP:

- 0.89: Nicola Salmoria removed Galaga '88 (set 2). It was a hacked version removing the key custom checks and disabling ROM checksum tests. Added new user1 rom ($300000).

- 0.36b16: Changed palettesize to 5121 colors.

- 0.36b14: Added clone Galaga'88 (set 2).

- 0.36b12: Changed palettesize to 10753 colors.

- 26th October 1999: Tatsuyuki Satoh fixed Galaga'88.

- 0.36b7: Added 2x DAC sound.

- 0.36b6: Changed palettesize from 3584 to 3585 colors.

- 0.36b4: Ernesto Corvi and Tatsuyuki Satoh added Galaga'88 (set 1) (Namco 1987) and clone (Japan).

- 0.35b7: An unofficial MAME version supported at first Galaga'88 and Pacmania.

- 0.35b5: Ernesto Corvi added Galaga 88 (Testdriver).

- 4th March 1999: Ernesto Corvi submitted the Namco System 1 driver with support for Pacmania and Galaga'88. The Namco System 1 driver is still very slow and sprites are screwed. Pacmania and Galaga'88 are the games that work best, Dragon Spirits is almost there, Splatter House and Blazer have missing graphics and World Stadium 90 has protection problems.


LEVELS: 29


Other Emulators:

* JAS-SYS1


Category: Galaxian


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Romset: 2244 kb / 25 files / 612 zip