Microsoft will provide a Software Developer's Kit for the makers of ATM network adapters to allow them to write NDIS 4.1 miniport drivers. Because LAN Emulation and signaling will be provided in the operating system, a miniport is basically a hardware interface, greatly simplifying code requirements for adapter vendors and reducing development time in bringing new products to market. The SDK is set for release for the fall of 1996, so developers can build and test their ATM miniport drivers even before Microsoft releases the operating system components that use the drivers, which are scheduled for delivery with Windows NT 5.0.