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# pon-gs
Apple IIgs simple pong game, with animation and sound. Written in 100% 658c16 assembly.
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## Getting Started
### Requirements
- Some *nix flavor. Please don't open issues if you are using Windows.
- GNU build tools (`autoconf`, `gcc` , etc.)
- Basic understanding of C/C++ build issues, since you'll likely face some.
- An Apple IIGS emulator of your flavor + the appropriate ROM (which you will have to source for yourself)
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- The assemble script uses `gsplus`
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### Building
There are two scripts here which will get all the tools needed to assemble the game.
```bash
./build_env.sh # to grab utils
./assemble.sh # to assemble the game
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```
The `assemble` script runs the assembly source through Merlin32, then changes the ProDOS file kind to `S16` , an executable format that is used for GS/OS applications. `_FileInformation.txt` is what `cadius` uses to manage the ProDOS metadata for each record (since obviously this information can't be mapped to your computer's filesystem).
## References
There are a lot of good materials out there: here is what I used to make this game.
- [IIgs Hardware Architecture ](http://www.goldstarsoftware.com/applesite/Documentation/AppleIIgsHardwareReferenceManual.PDF )
- p. 74 has a memory map
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- [IIgs firmware reference ](http://www.applelogic.org/files/GSFIRMWAREREF1.pdf )
- Importantly, overview on bank $00, D $0000
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- [Scanlon's IIgs Assembly Programming ](ftp://ftp.apple.asimov.net/pub/apple_II/documentation/programming/65816_gs/Apple%20IIGS%20Assembly%20Language%20Programming.pdf )
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- Tremendously useful reference for QuickDraw and some tools
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- [Programming the 65816 and 65xx family ](https://apple2.gs/downloads/Programmanual.pdf )
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- Official WDC manual.
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- ["PEI Slam" fast SHR rendering ](https://retrocomputing.stackexchange.com/questions/52/how-do-i-use-shadowed-memory-to-render-super-hi-res-quickly )
- [Changing ProDOS file types with Cadius ](https://groups.google.com/forum/#!topic/comp.sys.apple2/dqcTdS9epdQ )
- [6502 opcode list ](http://www.defence-force.org/computing/oric/coding/annexe_2/ )
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- [65816 opcode list ](http://www.intel-assembler.it/portale/5/65816_guide/opcode_reference.asp )
- [BrutalDeluxe GS/OS internals (VERY USEFUL) ](http://brutaldeluxe.fr/documentation/gsos/Apple_IIgs_GSOS_internals_v1.pdf )
- [Apple II 6502 for beginners ](http://www.appleoldies.ca/anix/Using-6502-Assembly-Language-by-Randy-Hyde.pdf )
- Has practical examples for reading user input, etc.
- [System monitor reference ](http://apple2.info/wiki/index.php?title=System_Monitor )
- This is the humbling moment I take back every bad thing I ever said about GDB in my life ever.
- [SNES CPU overview, same CPU, nice insights ](https://github.com/michielvoo/SNES/wiki/CPU )
- [SNES opcode list ](http://wiki.metroidconstruction.com/doku.php?id=super:technical_information:asm_mnemonics )
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- [65816 primer ](http://softpixel.com/~cwright/sianse/docs/65816NFO.HTM )
- [Another 6502 reference, insightful ](https://github.com/wiz-lang/wiz/wiki/Registers-and-Memory-(6502 ))
