[stevekemp]

I fondly remember INT 21h, and reading the 40Hex magazine along with Ralph Brown's interrupt list.

I was recently working on generating some assembly language output and I added the ability to generate a breakpoint at the start of my executable.

It took me an embarassingly long time to realize that the reason my executables were crashing, not dropping into the debugger, was that "INT3" was assembled differently than "INT 03h" - I knew I needed 0x03, and I knew it was the one-byte form of the instruction (0xCC) rather than (0xCD 0xNN), to ease patching, but .. yeah.