preface.asm

摩托罗拉Mc6805利程

; Preface 6805 assembly language programs
; Jonathan W. Valvano
; This software accompanies the book,
; Embedded Microcomputer Systems: Real Time Interfacing
; published by Brooks Cole, 1999
;
; Program P.1 (Preface)
; MC68HC705J1A
PORTA equ  $0000
      org  $0300 Programs in EPROM
Start lda  PORTA input Port A
      sta  $00C0 save in RAM
      bra  Start
      org  $07FE
      fdb  Start beginning address