interrupt.h File Reference

Interrupt Controller. More...

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Macros
#define	RESET_TIME_LENGTH   TICKS_FROM_MS(200)
	Guaranteed length of the reset time. More...

Enumerations
enum	interrupt_state_t { INTERRUPTS_UNINITIALIZED , INTERRUPTS_DISABLED , INTERRUPTS_ENABLED }
	State of interrupts on the system. More...

Functions
void	register_AI_handler (void(*callback)())
	Register an AI callback. More...
void	register_VI_handler (void(*callback)())
	Register a VI callback. More...
void	register_PI_handler (void(*callback)())
	Register a PI callback. More...
void	register_DP_handler (void(*callback)())
	Register a DP callback. More...
void	register_SI_handler (void(*callback)())
	Register a SI callback. More...
void	register_SP_handler (void(*callback)())
	Register a SP callback. More...
void	register_TI_handler (void(*callback)())
	Register a timer callback. More...
void	register_CART_handler (void(*callback)())
	Register a CART interrupt callback. More...
void	register_RESET_handler (void(*callback)())
	Register a handler that will be called when the user presses the RESET button. More...
void	unregister_AI_handler (void(*callback)())
	Unregister an AI callback. More...
void	unregister_VI_handler (void(*callback)())
	Unregister a VI callback. More...
void	unregister_PI_handler (void(*callback)())
	Unegister a PI callback. More...
void	unregister_DP_handler (void(*callback)())
	Unregister a DP callback. More...
void	unregister_SI_handler (void(*callback)())
	Unegister a SI callback. More...
void	unregister_SP_handler (void(*callback)())
	Unegister a SP callback. More...
void	unregister_TI_handler (void(*callback)())
	Unregister a timer callback. More...
void	unregister_CART_handler (void(*callback)())
	Unregister a CART interrupt callback. More...
void	unregister_RESET_handler (void(*callback)())
	Unregister a RESET interrupt callback. More...
void	set_AI_interrupt (int active)
	Enable or disable the AI interrupt. More...
void	set_VI_interrupt (int active, unsigned long line)
	Enable or disable the VI interrupt. More...
void	set_PI_interrupt (int active)
	Enable or disable the PI interrupt. More...
void	set_DP_interrupt (int active)
	Enable or disable the DP interrupt. More...
void	set_SI_interrupt (int active)
	Enable or disable the SI interrupt. More...
void	set_SP_interrupt (int active)
	Enable or disable the SP interrupt. More...
void	set_TI_interrupt (int active)
	Enable or disable the timer interrupt. More...
void	set_CART_interrupt (int active)
	Enable or disable the CART interrupt. More...
void	set_RESET_interrupt (int active)
	Enable the RESET interrupt. More...
uint32_t	exception_reset_time (void)
	Check whether the RESET button was pressed and how long we are into the reset process. More...
void	enable_interrupts ()
	Enable interrupts systemwide. More...
void	disable_interrupts ()
	Disable interrupts systemwide. More...
interrupt_state_t	get_interrupts_state ()
	Return the current state of interrupts. More...

Detailed Description

Interrupt Controller.

Macro Definition Documentation

RESET_TIME_LENGTH

#define RESET_TIME_LENGTH   TICKS_FROM_MS(200)

Guaranteed length of the reset time.

This is the guaranteed length of the reset time, that is the time that goes between the user pressing the reset button, and the CPU actually resetting. See exception_reset_time for more details.

Note

The general knowledge about this is that the reset time should be 500 ms. Testing on different consoles show that, while most seem to reset after 500 ms, a few EU models reset after 200ms. So we define the timer shorter for greater compatibility.