The archive file: "twindvr.zip" contains the complete sources and documentation for the Gracilis PackeTwin synchronous driver, for IBM PC versions of NOS. Release 2.1 9/12/92 Files in the distribution: twindvr.txt - This archive description file twindvr.doc - Installation / Configuration Documentation gracilis.c - Generic support routines and definitions for Gracilis Products gracilis.h - Type definitions, structures etc. twin.h - PackeTwin specific definitions, structures twin_at.c - PackeTwin attach routine and statistics etc. twin_dr.c - PackeTwin driver routines for sending/receiving packets twinvec.asm - PackeTwin interrupt handler routine