© 2000 Scenix Semiconductor, Inc. All rights reserved. 75 SX User’s Manual Rev. 3.1 www.scenix.com Chapter 3 Instruction Set program   to   continue   with   the   instruction   immediately   following   the   “call”
instruction. The “addxy” routine must start in the lower half of a 512-word page of the program
memory. This is because bit 8 of the subroutine address must be 0. The PA2:PA0
bits of the STATUS register must contain the three high-order bits of the subroutine
address prior to the “call” instruction. This is the purpose of the “page” instruction.