Space!
Space!
Publisher: CodeWorks - CursorGenre: 3D
Programmer: Greg Erker
Year: 1979
Uploaded by: admin
Language: English
Downloads: 65
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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
PACE! is a simple space shooting game. Use the number pad to move your crosshairs across the independently-scrolling starfield and press SHIFT to shoot. Targeting is tricky and only a precise hit will take down the enemy ships. Your continuously-depleting energy—needed both for flying and firing your laser—imposes a strict time limit. A machine-language subroutine placed in the cassette buffer allows the background starfield to scroll in all directions as you move your crosshairs. Overall, this is a solid and challenging game for the time.
There is a problem, though: SPACE! is only playable on early PETs. If you try to play the game on, say, a 4016, you won't be able to control your movements, because the keyboard-reading subroutine depends upon the results of PEEK(151) (the program corrects this PEEK to look at memory location 515 on first revision ROMs), and different models of PET/CBM decdode the keyboard matrix with different values. Jim Butterfield discouraged the use of PEEK(151) to read the keyboard becuase of the compatability issues that result.
There is a problem, though: SPACE! is only playable on early PETs. If you try to play the game on, say, a 4016, you won't be able to control your movements, because the keyboard-reading subroutine depends upon the results of PEEK(151) (the program corrects this PEEK to look at memory location 515 on first revision ROMs), and different models of PET/CBM decdode the keyboard matrix with different values. Jim Butterfield discouraged the use of PEEK(151) to read the keyboard becuase of the compatability issues that result.
