This group is dedicated to the development of software for eCS and OS/2 in Assembly Language. We have the choice of two environments to work in and both are freely available: ALP is part of both the OS2 Developers Kit and the OS2 Device Driver Kit, and WASM is part of the OpenWatcom C++ package. Unfortunately, neither of them is very well documented. They both claim to be somewhat MASM 6 compatible, but neither is fully compatible. I think I prefer WASM and the Open Watcom IDE, but your mileage may vary.