HARI MAHADEVAN (何瑞理)

For the past couple of weeks, I have been working on something that I thought I had left behind a long time ago, a very long time ago -- a windows device driver! I had launched my career writing drivers, first for OS/2 and then eventually for Windows. When I say Windows, I'm referring to Windows NT 3.51. That's correct, NT 3.51! And here's a surprise, the first Windows NT driver that I worked on ran on PowerPC platform! IBM was readying their new state-of-the-art PC platform and to play it safe wanted to give the user the choice of platforms to run -- OS/2 and Windows NT. Being a new platform, the toolsets were not quite as well developed as they were for the more contemporary and stable x86. WinDBG (a far cry from the WinDBG of these days) had issues syncing the source line information in the PDB with the actual source files. Quite often I had to resort to using the disassembly to isolate the root cause and fix it. Another challenge that I faced then was that the x86 ...