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Jan 14, 2013 · ataribooks-mapping-the-atari Identifier-ark ark:/13960/t56d75k10 Isbn 0874550041 Lccn 85237679 Ocr ABBYY FineReader 8.0 Openlibrary OL2654380M Openlibrary_edition OL2654380M Openlibrary_work OL5212125W Ppi 300 Year 1985
Updated edition of Ian Chadwick's popular and essential reference for the Atari 8-bit home computers.
Mapping the Atari provides comprehensive information on Atari games, demos, and utilities for various models.
- Least-Most Storage
- And, Or, and EOR
- About Languages
- Glossary
- A Graphics Memory Map
- Notes
- Atari Timing Values
The Atari uses the convention of storing addresses in the LSB/MSB manner in memory (i.e, the smaller part is in the first memory location). For example, locations 88 and 89 store the lowest address of the screen memory. Let's say the numbers found there are 22 and 56, respectively. To get the decimal address, you take the MSB (stored in 89) and mul...
It is useful to know how to perform Boolean logic on bits. There are three functions used in assembly code for bit manipulation in this manner: AND, OR and EOR (exclusive OR). Each requires you to use two numbers, the one being acted upon and the one used to perform the function. Here is a brief explanation of how these logical functions work: AND ...
The majority the information here concerns language-independent locations and can be used regardless of the language you use for your programming. When the location is language-dependent, such as the BASIC or DOS areas, I have noted it in the proper section. You may exert the same control over your Atari in whatever language you chose. You will obv...
ANTIC, CTIA AND GTIA, PIA, POKEY:Special Atari chips controlling the 400/800's graphics, color and screen resolution controller jacks and. sound, respectively. Located in ROM, locations 53248 to 54783. ANTIC also processes the Non-Maskable Interrupts and POKEY processes the Interrupt Requests. These chips, along with the 6502 microprocessor which r...
This diagram is not to scale; it is merely meant to give you a visual idea of the structure of the Atari memory. The numbers on the right are the memory pointers: these locations point to the addresses shown. The numbers on the left are the actual locations in memory.
The bottom of the BASIC RAM depends on whether or not you have DOS files loaded in. Without DOS, LOMEM should be 1792, with DOS 7420. If you increase or decrease the number of disk and sector buffers by modifying DOS, this value will change again. See locations 743, 744 and 1801, 1802. The size and location of the variable, string and array tables ...
VBLANK time = 7980 machine cycles or less, depending on GRAPHICS mode. The shortest 6502 instruction requires two cycles; during that time the electron beam moves four color clocks.
Jun 14, 2019 · Addeddate 2019-06-14 18:42:44 Identifier atari_mapping_the_atari Identifier-ark ark:/13960/t4cp4t83p Ocr ABBYY FineReader 11.0 (Extended OCR)
Aug 18, 2013 · Mapping the Atari "A Small System Services, Inc. publication." ... For users with print-disabilities. download 1 file ... PDF WITH TEXT download. download 1 file ...
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Unlocking Adventure. Adventure is credited as containing the first "Easter Egg" for the Atari 2600. This map will help you unlock the credit screen with Warren Robinett's name.
