Function check

tests/modules/files/flash/readwriteerase.js:63–71

(offset, byteLength, value)

}

function check(offset, byteLength, value) {
	const b = new Uint8Array(f.read(offset, byteLength));
	for (let i = 0; i < byteLength; i++) {
		const t = b[i];
		if (b[i] !== value)
			return false
	}
	return true;
}