Oh those good memories of the TI-83, my first and only foray into the world of assembler programming, trying to cram a complex algorithm in 6 registers, the good times!
You mean five registers, all of them accessible through the sixth! I had a nice hand written note for register allocation for the Z-80; I used an stack-based IR and mapped the TOS to #A. I hope to god my parents haven't trashed my stuff, would love to see those perversions again :-)
