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README.md
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README.md
@ -21,7 +21,7 @@ After [reinette](https://github.com/ArthurFerreira2/reinette) (Apple 1 emulator)
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* zoom the window by integer increments
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It uses the same MOS 6502 CPU emulator as her sisters (now christened puce6502).\
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It uses the same MOS 6502 CPU emulator as her sisters (now christened [puce6502](https://github.com/ArthurFerreira2/puce6502)).\
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You only need SDL2 to compile it. (I'm not using SDL_Mixer, but only the native SDL2 audio functions)
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@ -30,7 +30,7 @@ This emulator is not accurate in many ways and does not compete with
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I wrote it in the goal to better understand the Apple ][ internals, and I'm publishing the sources in the hope they will be of any help.
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It's compact, less 1000 SLOC, with two source files only, one for the CPU emulation, the other for the computer itself.
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It's compact, less 800 SLOC, with two source files only, one for the CPU emulation, the other for the computer itself.
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I did my best to comment everything, and if you have an idea of how an Apple ][ works, it should be easy for you to understand the code, modify and enhance it for your needs (see TODO section).
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@ -46,7 +46,7 @@ Drag and drop a disk image file (.nib format only) to inset it into drive 1\
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Drop the file while pressing the ALT key to insert it into drive 2
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Use the functions keys to control the emulator itself
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```
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* F1 : writes the changes of the floppy in current drive back to host
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* F5 : zoom out down to 1:1
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* F6 : zoom in, no magnification limit
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@ -61,20 +61,20 @@ Paddles / Joystic :
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* numpad 1 : left
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* numpad 3 : right
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* numpad 2 : down
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* numpad 3 : up
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* numpad 3 : up
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* CTRL : button 0
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* ALT : button 1
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```
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### limitations
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* High pitch noise at high volume (might be related with my environment)
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* Sound cracks when playing for long period (intro music for example)
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* high pitch noise at high volume (might be related with my environment)
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* sound cracks when playing for long period (intro music for example)
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* CPU is not 100% cycle accurate - see source file for more details
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* Colors are approximate (taken from a scan of an old Beagle bros. poster)
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* colors are approximate (taken from a scan of an old Beagle bros. poster)
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* HGR is inhacurate, and does not implement color clashing
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* disk ][ access is artificially accelerated
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* Only support .nib floppy images. (you can use [CiderPress](https://github.com/fadden/ciderpress) to convert your images to this format)
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* only support .nib floppy images. (you can use [CiderPress](https://github.com/fadden/ciderpress) to convert your images to this format)
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* only has 48KB of RAM (can't run some software requiring the language card)
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* and many others ...
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