DMGHeader/DMGHeader/MemorySize.cs

namespace DMGHeader {
    public class MemorySize {
        private int _size;

        public int Banks { get; private set; }

        public int BankSize { get; }

        public int Size {
            get => _size;
            set {
                _size = value;
                if(_size <= BankSize * 2)
                    Banks = 0;
                else
                    Banks = _size / BankSize;
            }
        }

        public MemorySize(int bankSize) {
            BankSize = bankSize;
        }

        public override string ToString() {
            var ret = $"{Size} KB ";
            if(Banks == 0)
                ret += "(no bank switching)";
            else
                ret += $"({Banks} banks of {BankSize} KB each)";

            return ret;
        }
    }
}