vm

package

v0.0.0-...-0d836e2 Latest Latest Go to latest Published: Jun 30, 2023 License: MIT Imports: 6 Imported by: 0

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const (
	MaxWord = 1<<16 - 1
	MemMax  = MaxWord + 1
)

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const (
	BR word = iota
	ADD
	LD
	ST
	JSR
	AND
	LDR
	STR

	NOT
	LDI
	STI
	JMP

	LEA
	TRAP
)

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const (
	POS word = 1 << iota
	ZERO
	NEG
)

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const (
	TrapGetc word = iota + 0x20
	TrapOut
	TrapPuts
	TrapIn
	TrapPutsp
	TrapHalt
)

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const (
	KbdStatus word = 0xFE00
	KbdData   word = 0xFE02
)

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type BadOpError word

func (e BadOpError) Error() string

type BadTrapError word

func (e BadTrapError) Error() string

type VM struct {
	*term.Terminal
	// contains filtered or unexported fields
}

func New(trm *term.Terminal) *VM

func (vm *VM) KbdLoop()

func (vm *VM) LoadImageFromFile(fname string)

func (m VM) MemRead(addr word) word

func (m VM) MemWrite(addr, val word)

func (r VM) R(i word) word

func (vm *VM) Run() error

func (r VM) Set(instr word, fn func(word, word) word)

func (r VM) SetR(i, data word)

func (vm *VM) Stop()

func (r VM) Val0(instr word) word

func (r VM) Val1(instr word) word

func (r VM) Val2(instr word) word

func (vm *VM) WriteString(s string)