Any 6502 wonks among my followers?

I've got an intriguing one disassemblng this ROM and wonder if it was common on embedded stuff. This pattern appears quite a lot in disassembled code:

LDA $AAAA

LDA #$FF

I'm quite sure the second op overwrites whatever happened in the first op (which makes LDA $AAAA superfluous). Os this some magic foo on the 6502 to (eg.) force a reset?

(CS lines has this reading from the EPROM in this case, and A12..A15 aren't connected either so it masks...)

#asm #6502