riot

Documentation

Overview

Package riot (RIOT) represents the active part of the PIA 6532. It does not handle the RAM part of the 6532, that can be found in the memory package.

The active parts of the RIOT are:

Timer
I/O system

The timer can be found in the timer package, whereas the I/O system can be found in the input package.

Index

• type RIOT
  • func NewRIOT(mem bus.ChipBus, tiaMem bus.ChipBus) (*RIOT, error)
  • func (riot *RIOT) Step()
  • func (riot RIOT) String() string
  • func (riot *RIOT) Update()

Types

type RIOT

type RIOT struct {
	Timer *timer.Timer
	Input *input.Input
	// contains filtered or unexported fields
}

RIOT represents the PIA 6532 found in the VCS

func NewRIOT

func NewRIOT(mem bus.ChipBus, tiaMem bus.ChipBus) (*RIOT, error)

NewRIOT is the preferred method of initialisation for the RIOT type

func (*RIOT) Step

func (riot *RIOT) Step()

Step moves the state of the RIOT forward one video cycle

func (RIOT) String

func (riot RIOT) String() string

func (*RIOT) Update

func (riot *RIOT) Update()

Update checks for the most recent write by the CPU to the RIOT memory registers