memory

Documentation

Index

• type Basic
  • func (b Basic) LoadROM(dir string) error
  • func (b Basic) Read(addr uint16) byte
  • func (b Basic) ReadAll() []byte
  • func (b Basic) Write(addr uint16, v byte)

Types

type Basic

type Basic []byte

Basic is an in-memory implementation of the Space Invaders memory.

The Space Invaders memory is mapped as follows:

$0000-$1FFF -> 8K ROM $2000-$23FF -> 1K RAM $2400-$3FFF -> 7K Video RAM $4000 -> RAM mirror

For more details on the ROM structure see machine.LoadROM.

func (Basic) LoadROM

func (b Basic) LoadROM(dir string) error

LoadROM loads the Space Invaders ROM into memory.

The ROM itself is broken down into 4 parts with the following address ranges:

$0000-$07ff: invaders.h $0800-$0fff: invaders.g $1000-$17ff: invaders.f $1800-$1fff: invaders.e

func (Basic) Read

func (b Basic) Read(addr uint16) byte

Read returns the value from memory at the given address.

func (Basic) ReadAll

func (b Basic) ReadAll() []byte

ReadAll returns the full memory contents.

func (Basic) Write

func (b Basic) Write(addr uint16, v byte)

Write writes the value v into memory at the given address.