LDA #$00
STA $FC
STA $FE
LDA #$80 ;copies from $8000
STA $FF
LDA #$20 ;copies to $2000
STA $FD
LOOP LDY #0
MOV256 LDA ($FE),Y
STA ($FC),Y
INY
BNE MOV256
INC $FD
INC $FF
LDA $FF
CMP #$84 ;ending address goes here.. right now it stops at $8400
BNE LOOP
RTS