44 lines
956 B
Go
44 lines
956 B
Go
package chip8
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const (
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MemorySize = 4096 // 4KB of memory
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StackSize = 16
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InstructionSize = 2
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)
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const (
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ProgramAddress = uint16(0x0200)
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StackAddress = uint16(0x0EA0)
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VideoBufferAddress = uint16(0x0F00)
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)
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type Emulator struct {
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V [16]uint8 // general registers
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I uint16 // address register
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SP uint16 // stack pointer
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PC uint16 // program counter
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Memory [MemorySize]uint8 // 4KB of system RAM
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Timer struct {
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Delay uint8 // delay timer
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Sound uint8 // sound timer
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}
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ROM []uint8
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}
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func NewEmulator() *Emulator {
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emulator := new(Emulator)
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emulator.Reset()
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return emulator
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}
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func (emulator *Emulator) Reset() {
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emulator.V = [16]uint8{}
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emulator.I = 0
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emulator.SP = StackAddress
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emulator.PC = ProgramAddress
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emulator.Memory = [MemorySize]uint8{}
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emulator.Timer.Delay = 0
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emulator.Timer.Sound = 0
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copy(emulator.Memory[ProgramAddress:], emulator.ROM)
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}
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