Well, another bee in my bonnet... I'm experienting with an x86-based hobby robotics controller, but I'd like to graft certain functionality onto old MSDOS (don't ask why), including a ROM monitor, etc. I remember that MS carried a special version of MSDOS for people who need to modify the code for specific hardware. Certain portions of DOS are provided as source and the rest as object code. Does anyone have a copy of this? Rich [ Rich Cini/WUGNET [ ClubWin!/CW1 [ MCP Windows 95/Windows Networking [ Collector of "classic" computers [ http://highgate.comm.sfu.ca/~rcini/classiccmp/ <---------------------------- reply separator