Aliens!
Aliens!
Publisher: CodeWorks - CursorGenre: Space Invaders
Programmer: Mike Hamilton
Year: 1980
Uploaded by: admin
Language: English
Downloads: 78
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Game input holds PET matrix keys down until you physically release them, which is best for arcade games. Type input keeps the original short-tap queue for entering BASIC commands.
Charset Auto lets PET software switch normally. Graphics or Business forces the selected character ROM for compatibility/testing.
Changing RAM or ROM resets the PET. Some programs need ROM2/ROM4 or 16K/32K.
The sound slider controls the emulated PET VIA speaker. Modern browsers require a click before audio can start, so Start Game also enables audio.
The emulator has an IEEE-488 device at address 8 for loading/saving .prg files.
70%
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Game Notes
ALIENS! is a fixed shooter in which you move your turret along the bottom of the screen and shoot aliens that descend from the top. If an alien reaches the bottom, it's game over. The game starts out easy, but as the game progresses, the aliens get faster and faster. The controls are fluid and the scrolling is smooth. This is a solid (and slightly addicting) arcade game.
The keyboard controls won't work on later models of the PET. I haven't tried disassembling the program, but I suspect that the keboard is read through memory location 151 ($97), which was a frequent cause of compatibility issues.
The keyboard controls won't work on later models of the PET. I haven't tried disassembling the program, but I suspect that the keboard is read through memory location 151 ($97), which was a frequent cause of compatibility issues.
