1995, 1997 — Automatic Data Processing, Inc.
When ADP began creating their AutoPay product suite to replace the Payroll, they needed a communications module to perform the communications tasks over the modem to their mainframes. They brought me in to design and implement a 16-bit Windows DLL and test application to fit this need.
After our initial meeting, we decided on the following design:
A state machine was written to control the modem, using generic AT commands. At this time, Windows 3.1 didn't recognize modems at the OS level, and TAPI hadn't been born yet.
A terminal emulation class was developed to interact with Check-Mate as if we were an IBM 3101 terminal (which is how Check-Mate was originally used). I had to reverse-engineer the screen formats, and develop a sort of scripting capability to programmatically control the terminal session.
Armed with the source code for PC Payroll's modified ZMODEM code, I ported it to use our communication class methods.
The DLL and test application were developed according to ADP's CSS coding standards, using Microsoft Visual C++, and totaled over 25,000 lines of code.
The project contained over 25,000 lines of code. AComm.Dll was later upgraded to WIN32, and a modem auto-detect was added. TAPI support was added in 1997, and was the basis for the ACommServer project in 2000.
Copyright © 2002-2011
Robert E. Weatherford, Johns Creek, GA (A suburb North of Atlanta). All Rights