timer

type T1 ¶

type T1 struct {
	// contains filtered or unexported fields
}

T1 implements a simple timer as used in the LPC2000.

An example of a game that uses T1 is Draconian. It uses it to test what spec the console is (NTSC, PAL, etc.)

Another good example is Andrew Davie's ARM powered Boulderdash. it also uses the timer to test for the console spec; and also to time the wipe that starts and ends the level. character movemement is also affected by the timer

func NewT1(mmap architecture.Map) *T1

func (t *T1) Read(addr uint32) (uint32, bool)

func (t *T1) Reset()

func (t *T1) Step(cycles float32)

func (t *T1) Write(addr uint32, val uint32) bool

type TIM2 ¶

type TIM2 struct {
	// contains filtered or unexported fields
}

TIM2 implements the TIM2 timer found in STM32 processors.

func NewTIM2(mmap architecture.Map) *TIM2

func (t *TIM2) Read(addr uint32) (uint32, bool)

func (t *TIM2) Reset()

func (t *TIM2) Step(cycles float32)

func (t *TIM2) Write(addr uint32, val uint32) bool

type Timer ¶

type Timer interface {
	Reset()
	Step(cycles float32)
	Write(addr uint32, val uint32) bool
	Read(addr uint32) (uint32, bool)
}

Timer is an abstraction of the various types of timer found in the difference ARM CPU pacakages