>Could be. I "cut my teeth" writing 6502 assembler on an Atari. (Which had great docs, BTW. Memory map, source code for the OS and BASIC interpreter). There it was VBI. Good grief! Do you realize that "acronym hell" existed back then?:-)

I did a lot of stuff on Z-80's (TRS-80 and stand alone hardware). My first exposure to that level of stuff was on CGA and EGA adapters for the PC. I think "acronym hell" goes back to whenever the first abreviation of a word took place. <s>