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CREDITS.md

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Credits and Attributions

This project was really about integrating a lot of existing code from various sources. I want to acknowledge this work and the original authors (where known).

Thanks to 6502.org for the great resources provided there.

The emulator and EhBasic are based on the arduino_6502 project from miker00lz (Mike Chambers) and declared public domain http://forum.arduino.cc/index.php?topic=193216.0 http://rubbermallet.org/fake6502.c

BCD math routines are from Mike B. and added to Mike Chambers implementation http://forum.6502.org/viewtopic.php?p=37758#p37758

Apple I ROMs are (c) Steve Wozniak / Apple Inc. Status is Freeware according to: http://www.callapple.org/soft/ap1/emul.html

EhBasic is the work of Lee Davison: http://retro.hansotten.nl/6502-sbc/lee-davison-web-site/

Applesoft-Lite: https://cowgod.org/replica1/applesoft/

Apple1js by Will Scullin provided inspiration for packaging built-in programs as part of the system. My implemenation is different, but inspired by this excellent on-line emulator. It was also very useful to compare output when debugging a1plus. https://github.com/whscullin/apple1js

Included programs:

30th Anniversary
Original source unknown, Apple?
As posted by Dave Schmenk:
https://www.applefritter.com/node/24600#comment-60100

Fig-Forth
W. F. Ragsdale https://www.applefritter.com/node/4166

Microchess
Peter Jennings http://www.benlo.com/microchess/index.html

21
https://www.callapple.org/soft/ap1/games.html

Life
https://www.callapple.org/soft/ap1/games.html

Lunar Lander
Originally from David Ahl's 101 Basic Computer Games
https://www.applefritter.com/content/8k-apple-i-ascii-graphics-lunar-lander-aci-audio-hack
(modified to remove the audio hack)

Star Trek
Larry Nelson https://www.callapple.org/soft/ap1/games.html

Little Tower
Arnaud Verhille https://www.applefritter.com/content/little-tower-02

15 Puzzle
https://www.callapple.org/soft/ap1/games.html