Space!
Publisher: CodeWorks - CursorGenre: 3D
Programmer: Greg Erker
Year: 1979
Language: English
Downloads: 22
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The keyboard graphic responds to mouse clicks, touch events, and key presses.
Hold your shift key while clicking the PET keyboard to get the graphics
characters.
(The emulator simulates pressing the PET's left shift-key at the
same time as the clicked key.)
Changing the size of memory or changing the ROM version forces a reset of the PET.
The emulator has an IEEE-488 device at address 8. It can be used load and save (.prg) files.
Some programs don't run on ROM1 and some require more memory than the default 8K.
Game Notes
May include inaccurate AI generated content
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.
