Sound!
Sound!
Publisher: CodeWorks - CursorGenre: Demo
Programmer: Ken Matthews
Year: 1979
Uploaded by: admin
Language: English
Downloads: 60
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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.
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Game Notes
SOUND! is a small library of sound effects and short tunes to showcase the PET's CB2 sound capability. (The ! on the filename lets you know that SOUND! has sound, just in case there's any confusion.) The variety of sounds that the author was able to coax out of the PET's simple square-wave generator must have been impressive in 1979 (and it's still pretty nifty today). The program listing is a useful resource for programmers who want to learn more about CB2 sound, because each of the program's 17 sounds is created in a single, self-contained BASIC subroutine—no machine-language knowledge required.
