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Documentation
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src/apple2.c
27
src/apple2.c
@ -78,6 +78,11 @@ apple2_create(int width, int height)
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return mach;
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}
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/*
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* Return true if we are in a state that the apple2 would consider
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* double resolution. (In practice, this refers to horizontal screen
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* density; vertical screen density per-pixel is unchanged.)
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*/
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bool
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apple2_is_double_video(apple2 *mach)
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{
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@ -87,6 +92,10 @@ apple2_is_double_video(apple2 *mach)
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mach->video_mode == VIDEO_80COL_TEXT;
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}
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/*
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* Try to "boot" the apple2 machine. Look for input sources indicated in
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* the option system and load those into our disk drives.
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*/
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int
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apple2_boot(apple2 *mach)
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{
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@ -143,6 +152,10 @@ apple2_free(apple2 *mach)
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free(mach);
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}
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/*
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* Emulate the notion of a pressed key in the apple2 with a given
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* character.
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*/
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void
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apple2_press_key(apple2 *mach, vm_8bit ch)
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{
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@ -173,6 +186,12 @@ apple2_release_key(apple2 *mach)
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vm_segment_set(mach->memory, ANY_KEY_DOWN, 0);
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}
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/*
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* The run loop is the function that essentially waits for user input
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* and continues to present the apple2 abstraction for you to use. At
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* some point the user will indicate they are done, whereby
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* vm_screen_active() will no longer be true and we exit.
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*/
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void
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apple2_run_loop(apple2 *mach)
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{
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@ -181,6 +200,10 @@ apple2_run_loop(apple2 *mach)
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}
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}
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/*
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* Set the color mode of the apple2, which is to say if we are emulating
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* a monochromatic display, or full color, or just black-and-white.
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*/
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void
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apple2_set_color(apple2 *mach, int mode)
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{
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@ -190,6 +213,10 @@ apple2_set_color(apple2 *mach, int mode)
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// correct color interpretation
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}
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/*
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* Set the video mode of the display. This would be the type of
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* resolution (text by which number of columns, lo-res, hi-res, etc.)
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*/
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void
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apple2_set_video(apple2 *mach, int mode)
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{
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