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47 lines
2.0 KiB
Markdown
47 lines
2.0 KiB
Markdown
# Apple2e
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Yet another Apple //e emulator.
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I wrote this not because the world needed another //e emulator, but because I wanted to have the fun of building a thing from scratch to run my old Apple //e software.
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At the time of writing, the emulator handles only 40-column text mode and no floppy.
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There are several AppleSoft files in this project (`*.A`) that can be copied into the clipboard and then pasted into the emulator window with CMD-V.
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Thanks to [Lawrence Kesteloot](http://github.com/lkesteloot) for keyboard code, and [Bart Grantham](http://github.com/bartgrantham) for extracting all our old floppy disk images!
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Thanks to Mike Chambers (miker00lz@gmail.com) for his 6502 CPU emulator, which I used as a reference when mine hung on "PRINT 5".
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Requirements for building:
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* GLFW
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* libao
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* OpenGL 3.2-compatible system
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* C++11
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* Currently the project only builds on MacOSX because of the linker line in `Makefile`. keyboard.cpp is UNIX-specific but could be stubbed on other platforms.
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On MacOSX with MacPorts, the GLFW and libao dependency can be satisfied with `glfw` and `libao` ports. According to https://support.apple.com/en-us/HT202823, almost all modern Macs should have OpenGL 3.2 or later. On my machine, I've been compiling with a g++ that outputs `Apple LLVM version 8.0.0 (clang-800.0.42.1)` for `g++ -v`.
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Usage:
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apple2e [options] <romfile>
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Options:
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-debugger # start in the debugger
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-fast # start with CPU running as fast as it can run
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-noaudio # stream no audio buffers
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Useful debugger commands:
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reset # Press CTRL-RESET
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reboot # Press CTRL-OpenApple-RESET
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fast # run CPU as fast as it can go
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slow # Approximate CPU at 1.023 MHz
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debug N # Set debug flags to N (decimal). See apple2e.cpp for flags
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go # Exit debugging, free-run. Press CTRL-B to break back into the debugger
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# Enter a blank line to step one instruction
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If no joystick or gamepad is configured, the Apple 2 screen acts as a joystick. To configure a joystick, store the GLFW numbers of the two axes and two buttons in "joystick.ini".
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