mz700-tape-wav-gen/utils.go

package mz700_tape_wav_gen

func GetSingleByteChecksum(b byte) uint16 {
	var num byte = 0
	/*
		v := b
		for v > 0 {
			v &= v - 1
			num++
		}
	*/
	for i := 0; i < 8; i++ {
		num += (b >> i) & 0x01
	}
	return uint16(num)
}

func GetByteSliceChecksum(bs []byte) uint16 {
	var chksum uint16 = 0
	for _, sb := range bs {
		chksum += GetSingleByteChecksum(sb)
	}
	return chksum
}