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| - | ===== Bally Professional Arcade ===== | ||
| - | This documentation describes the Bally Home Videogame System, otherwise known as the Bally Professional Arcade, Bally Home Computer, or Bally Astrocade. | ||
| - | The system is divided into six primary subsections based upon their functions: | ||
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| - | * The [[User Program Interface]] allows cartridges to reference the [[system routines]] through a standard interface, including an [[interpreter]]. | ||
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| - | * The [[Screen Handler]] provides routines for creating screen images, including facilities for initialization, pattern, and character display, coordinate conversion, and [[object vectoring]]. | ||
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| - | * The [[Human Interface]] reads keypad/controllers and inputs game selection and options. | ||
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| - | * The [[Interrupt Scheduler]] handles system timers and counters. | ||
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| - | * The [[Music]] routines handle music. | ||
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| - | * The [[Math Routines|Math]] routines manipulate floating BCD and decimal numbers, transfer data, and halt cartridge execution. | ||
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| - | ---- | ||
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| - | **NOTE:** The Nutting Manual lists slightly different system subsections on its opening page, within the system routine descriptions, and in the operating system source listing. The [[start|Better Bally Book]] favors the subsections organized in the source listing (pp. 6–7) both due to their logical organization and due to their complete listing of otherwise undocumented system routines. | ||
