tr-dos headline

val zxBytes = z80File.readBytes()
        val fileInfoLength = 16
        var startDisk = 0
        var basicStart = 0u
        var basicLength = 0u
        while (true) {
            val headline = ByteArray(fileInfoLength)
            System.arraycopy(zxBytes, startDisk, headline, 0, fileInfoLength)
//            System.arraycopy(array,0,array1,9,10)
            // копирование 10 элементов из массива array, начиная с позиции 0,
            // в массив array1, начиная с позиции 9
            startDisk += fileInfoLength
            if (headline[0].toInt() == 0) return
            val text = StringBuilder()
//            headline.copyOfRange(0, 7).forEach { text.append(it.toChar()) }
            val expansion = headline[8].toChar()
            text.append("File name: ").apply {
                headline.copyOfRange(0, 7).forEach { text.append(it.toChar()) }
            }.append(".").append(expansion)
                    .append(" | Start: ")
                    .append("track: ")
                    .append(headline[15].toUByte())
                    .append(", sector: ")
                    .append(headline[14].toUByte())
                    .append(" | Length: ")
                    .append(headline[10].toUByte() * 256u + headline[11].toUByte())
                    .append(" bytes. ")
            println(text)
            if (expansion == 'B') {
                basicStart = (headline[15] * 4096 + headline[14] * 256).toUInt()
                basicLength = headline[10].toUByte() * 256u + headline[11].toUByte()
//                basicLength = 256u
                val basicCode = zxBytes
                        .copyOfRange(basicStart.toInt(), (basicStart + basicLength).toInt())
                basicCode.forEachIndexed { id: Int, byte: Byte ->
                    if (id % 16 == 0) println()
                    print("${byte.toUByte()}, ")
                }
                println()
            }
        }