neon

package module

v0.0.0-...-6eb16da Latest Latest Go to latest Published: Jul 31, 2023 License: MIT Imports: 4 Imported by: 0

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
Learn more about best practices

Repository

git.gay/lewdum/neon

Links

Open Source Insights

README ¶

Neon

Neon is a fantasy CPU loosely inspired by the video game Shenzhen I/O.

Please see the manual for a detailed description.

Status

CLI that can compile and run programs.
WASM app that does the same thing on the browser.
Graphics system, backed by HTML5 Canvas.
Optional: Sound, video, 3D, etc.

Commands

The following commands assume you have cloned this repository and navigated to its root.

See it in action

go run git.gay/lewdum/neon/cmd/neon -r -m examples/loop.neon

Install it locally

go install git.gay/lewdum/neon/cmd/neon

Documentation ¶

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

This section is empty.

Types ¶

type CPU ¶

type CPU struct {
	// Accumulators:
	A, B uint8

	// Addresses:
	PC uint16 // program counter
	SP uint16 // stack pointer

	// Flags:
	T bool // test
	C bool // carry
	I bool // interrupt disable
	J bool // jump disable

	// Data:
	RAM [0xFFFF + 1]byte

	// Debugger hooks:
	OnStep  func(addr uint16, cd Condition, op Operator)
	OnError func(error) Interrupt

	// Subsystems:
	Rand *rand.Rand
}

func New ¶

func New() *CPU

func (*CPU) Load ¶

func (c *CPU) Load(data []byte)

func (*CPU) Run ¶

func (c *CPU) Run() Interrupt

func (*CPU) Step ¶

func (c *CPU) Step() Interrupt

type Condition ¶

type Condition byte

const (
	Always Condition = iota
	IfTrue
	IfFalse
	Randomly
)

func (Condition) String ¶

func (c Condition) String() string

type Interrupt ¶

type Interrupt uint8

const NoInterrupt Interrupt = 0

type Operator ¶

type Operator byte

const (
	NOP Operator = iota
	LAI
	LAM
	LAB
	LBI
	LBM
	LBA
	SWP
	STA
	STB
	ADI
	ADM
	ADB
	ACI
	ACM
	ACB
	INA
	INB
	SBI
	SBM
	SBB
	SCI
	SCM
	SCB
	DEA
	DEB
	TEI
	TEM
	TEB
	TGI
	TGM
	TGB
	TLI
	TLM
	TLB
	TFC
	TFI
	JMP
	JRF
	JRB
	JSR
	RET
	SET
	SEC
	SEI
	SEJ
	CLT
	CLC
	CLI
	CLJ
	INT
)

func (Operator) String ¶

func (i Operator) String() string

Source Files ¶

View all Source files

Directories ¶

Path	Synopsis
assembler
compiler
parser
scanner
cmd
neon

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