Copyright	(c) Rose 2019
License	BSD3
Maintainer	rose@lain.org.uk
Stability	experimental
Portability	POSIX
Safe Haskell	Safe
Language	Haskell2010

Lazyboy.IO

Description

This module defines IO and primitive graphics operations for Lazyboy.

Synopsis

class Bitfield a where
- pack :: a -> Word8
data Color
- = White
- | Light
- | Dark
- | Black
data LCDControl = LCDControl {
- lcdDisplayEnable :: Bool
- lcdWindowTileMap :: Bool
- lcdEnableWindowDisplay :: Bool
- lcdWindowSelect :: Bool
- lcdTileMapSelect :: Bool
- lcdObjSize :: Bool
- lcdEnableObjects :: Bool
- lcdBackgroundEnable :: Bool
}
defaultLCDControl :: LCDControl
disableLCD :: Lazyboy ()
setLCDControl :: LCDControl -> Lazyboy ()
data BackgroundPalette = BackgroundPalette {
- bgpColor3 :: Color
- bgpColor2 :: Color
- bgpColor1 :: Color
- bgpColor0 :: Color
}
defaultPalette :: BackgroundPalette
setBackgroundPalette :: BackgroundPalette -> Lazyboy ()
byte :: Register8 -> Word8 -> Lazyboy ()
write :: Location -> Word8 -> Lazyboy ()
memcpy :: Location -> Location -> Word8 -> Lazyboy ()
memset :: Location -> Word8 -> Word8 -> Lazyboy ()
onVblank :: Lazyboy () -> Lazyboy ()

Documentation

class Bitfield a where Source #

A typeclass for packing types into Word8.

Methods

pack :: a -> Word8 Source #

Instances

Bitfield BackgroundPalette Source #
Instance details Defined in Lazyboy.IO Methods pack :: BackgroundPalette -> Word8 Source #
Bitfield LCDControl Source #
Instance details Defined in Lazyboy.IO Methods pack :: LCDControl -> Word8 Source #
Bitfield Color Source #
Instance details Defined in Lazyboy.IO Methods pack :: Color -> Word8 Source #

data Color Source #

A type representing the monochrome shades available on the hardware.

Constructors

White
Light
Dark
Black

Instances

Eq Color Source #
Instance details Defined in Lazyboy.IO Methods (==) :: Color -> Color -> Bool # (/=) :: Color -> Color -> Bool #
Ord Color Source #
Instance details Defined in Lazyboy.IO Methods compare :: Color -> Color -> Ordering # (<) :: Color -> Color -> Bool # (<=) :: Color -> Color -> Bool # (>) :: Color -> Color -> Bool # (>=) :: Color -> Color -> Bool # max :: Color -> Color -> Color # min :: Color -> Color -> Color #
Bitfield Color Source #
Instance details Defined in Lazyboy.IO Methods pack :: Color -> Word8 Source #

data LCDControl Source #

A type representing the LCD screen control state.

Constructors

LCDControl
Fields lcdDisplayEnable :: Bool lcdWindowTileMap :: Bool lcdEnableWindowDisplay :: Bool lcdWindowSelect :: Bool lcdTileMapSelect :: Bool lcdObjSize :: Bool lcdEnableObjects :: Bool lcdBackgroundEnable :: Bool

Instances

Bitfield LCDControl Source #
Instance details Defined in Lazyboy.IO Methods pack :: LCDControl -> Word8 Source #

defaultLCDControl :: LCDControl Source #

The default LCDControl state - all flags set to False (0). In effect, this turns the screen off.

disableLCD :: Lazyboy () Source #

A convenience function which executes setLCDControl with the defaultLCDControl state. This turns the screen off.

setLCDControl :: LCDControl -> Lazyboy () Source #

Sets the LCD control state to a given value.

data BackgroundPalette Source #

A type representing the background palette.

Constructors

BackgroundPalette
Fields bgpColor3 :: Color bgpColor2 :: Color bgpColor1 :: Color bgpColor0 :: Color

Instances

Bitfield BackgroundPalette Source #
Instance details Defined in Lazyboy.IO Methods pack :: BackgroundPalette -> Word8 Source #

defaultPalette :: BackgroundPalette Source #

The default monochrome background palette.

setBackgroundPalette :: BackgroundPalette -> Lazyboy () Source #

Sets the background palette to a given palette.

byte :: Register8 -> Word8 -> Lazyboy () Source #

Writes a Word8 to a Register8.

write :: Location -> Word8 -> Lazyboy () Source #

Loads a Word8 into a Location.

memcpy :: Location -> Location -> Word8 -> Lazyboy () Source #

Copy a region of memory (limit 255 bytes) to a destination.

memset :: Location -> Word8 -> Word8 -> Lazyboy () Source #

Sets a region of memory to a Word8 value (limit 255 bytes).

onVblank :: Lazyboy () -> Lazyboy () Source #

Executes an action when vertical blank occurs.