3b1emu / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/keyboard.h	Wed Feb 09 15:03:31 2011 +0000
     1.3 @@ -0,0 +1,56 @@
     1.4 +#ifndef _KEYBOARD_H
     1.5 +#define _KEYBOARD_H
     1.6 +
     1.7 +#include "SDL.h"
     1.8 +
     1.9 +/// Keyboard buffer size in bytes
    1.10 +#define KEYBOARD_BUFFER_SIZE 256
    1.11 +
    1.12 +typedef struct {
    1.13 +	/// Key states
    1.14 +	int keystate[0x80];
    1.15 +
    1.16 +	/// Keyboard buffer
    1.17 +	char buffer[KEYBOARD_BUFFER_SIZE];
    1.18 +
    1.19 +	/// Read pointer
    1.20 +	size_t readp;
    1.21 +
    1.22 +	/// Write pointer
    1.23 +	size_t writep;
    1.24 +
    1.25 +	/// Number of bytes in keyboard buffer
    1.26 +	size_t buflen;
    1.27 +
    1.28 +	/// Transmit Interrupt Enable
    1.29 +	bool txie;
    1.30 +	/// Receive Interrupt Enable
    1.31 +	bool rxie;
    1.32 +} KEYBOARD_STATE;
    1.33 +
    1.34 +/**
    1.35 + * Initialise a keyboard state block.
    1.36 + *
    1.37 + * Call this once when the keyboard is added to the emulation.
    1.38 + */
    1.39 +void keyboard_init(KEYBOARD_STATE *ks);
    1.40 +
    1.41 +/**
    1.42 + * SDL_Event delegation routine.
    1.43 + *
    1.44 + * Call this when an SDL keyup or keydown event is received.
    1.45 + */
    1.46 +void keyboard_event(KEYBOARD_STATE *ks, SDL_Event *ev);
    1.47 +
    1.48 +/**
    1.49 + * Keyboard scan routine.
    1.50 + *
    1.51 + * Call this periodically to scan the keyboard. 60 times/sec should be fine.
    1.52 + */
    1.53 +void keyboard_scan(KEYBOARD_STATE *ks);
    1.54 +
    1.55 +bool keyboard_get_irq(KEYBOARD_STATE *ks);
    1.56 +uint8_t keyboard_read(KEYBOARD_STATE *ks, uint8_t addr);
    1.57 +void keyboard_write(KEYBOARD_STATE *ks, uint8_t addr, uint8_t val);
    1.58 +
    1.59 +#endif