risc

package

v0.3.0 Latest Latest Go to latest Published: Sep 10, 2021 License: ISC Imports: 3 Imported by: 2

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Repository

github.com/fzipp/oberon

Links

Open Source Insights

Documentation ¶

Overview ¶

Package risc implements emulation of the Project Oberon RISC processor.

Constants ¶

View Source

const (
	FramebufferWidth  = 1024
	FramebufferHeight = 768
)

Variables ¶

This section is empty.

Functions ¶

This section is empty.

Types ¶

type Clipboard ¶

type Clipboard interface {
	WriteControl(len uint32)
	ReadControl() uint32
	WriteData(value uint32)
	ReadData() uint32
}

type Error ¶

type Error struct {
	PC uint32
	// contains filtered or unexported fields
}

func (*Error) Error ¶

func (e *Error) Error() string

type Framebuffer ¶

type Framebuffer struct {
	Rect image.Rectangle
	Pix  []uint32
}

func (*Framebuffer) At ¶

func (fb *Framebuffer) At(x, y int) color.Color

func (*Framebuffer) Bounds ¶

func (fb *Framebuffer) Bounds() image.Rectangle

func (*Framebuffer) ColorModel ¶

func (fb *Framebuffer) ColorModel() color.Model

func (*Framebuffer) PixOffset ¶

func (fb *Framebuffer) PixOffset(x, y int) (i, bit int)

PixOffset is a helper method to locate a pixel in the Pix slice. It returns the index in Pix for the pixel at coordinates (x, y) and the bit position of the pixel within the word, i.e. the pixel value can be isolated with (fb.Pix[i]>>bit)&1.

The coordinates (x, y) are interpreted as image coordinates with the origin (0, 0) at the top left.

type LED ¶

type LED interface {
	Write(value uint32)
}

type RISC ¶

type RISC struct {
	PC uint32     // Program counter
	R  [16]uint32 // General registers R0..R15
	H  uint32     // Auxiliary register for high 32 bits of multiplication or remainder of division
	Z  bool       // Zero flag
	N  bool       // Negative flag
	C  bool       // Carry flag
	V  bool       // Overflow flag

	Mem []uint32 // Memory
	// contains filtered or unexported fields
}

func New ¶

func New() *RISC

func (*RISC) ConfigureMemory ¶

func (r *RISC) ConfigureMemory(megabytesRAM, screenWidth, screenHeight int)

func (*RISC) Framebuffer ¶

func (r *RISC) Framebuffer() *Framebuffer

func (*RISC) GetFramebufferDamageAndReset ¶

func (r *RISC) GetFramebufferDamageAndReset() image.Rectangle

func (*RISC) KeyboardInput ¶

func (r *RISC) KeyboardInput(ps2commands []byte)

func (*RISC) MouseButton ¶

func (r *RISC) MouseButton(button int, down bool)

func (*RISC) MouseMoved ¶

func (r *RISC) MouseMoved(x, y int)

func (*RISC) Reset ¶

func (r *RISC) Reset()

func (*RISC) Run ¶

func (r *RISC) Run(cycles int) error

func (*RISC) SetClipboard ¶

func (r *RISC) SetClipboard(c Clipboard)

func (*RISC) SetLEDs ¶

func (r *RISC) SetLEDs(l LED)

func (*RISC) SetSPI ¶

func (r *RISC) SetSPI(index int, spi SPI)

func (*RISC) SetSerial ¶

func (r *RISC) SetSerial(s Serial)

func (*RISC) SetSwitches ¶

func (r *RISC) SetSwitches(s int)

func (*RISC) SetTime ¶

func (r *RISC) SetTime(millis uint32)

type SPI ¶

type SPI interface {
	ReadData() uint32
	WriteData(value uint32)
}

type Serial ¶

type Serial interface {
	ReadStatus() uint32
	ReadData() uint32
	WriteData(value uint32)
}

Source Files ¶

View all Source files

Directories ¶

Path	Synopsis
internal
fp Package fp implements floating-point arithmetic operations for the Oberon RISC emulator.	Package fp implements floating-point arithmetic operations for the Oberon RISC emulator.
fp/test
fp/test/numbers Command numbers generates a Go file containing a slice of uint32 numbers as test input for the Oberon RISC emulator's floating-point arithmetic operations.	Command numbers generates a Go file containing a slice of uint32 numbers as test input for the Oberon RISC emulator's floating-point arithmetic operations.
fp/test/v2go Command v2go translates Verilog source code to Go.	Command v2go translates Verilog source code to Go.

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