;********************************************************************                                         *
;*                                                                  *
;* This program illustrates how to use the assembler.               *
;* It multiplies together two 8 bit numbers and leaves the unsigned *
;* result in the 'PRODUCT' location.                                *
;*                                                                  *
;* Author: Scott Goddard 500723518                                  *
;********************************************************************

; export symbols
 XDEF Entry, _Startup ; export ‘Entry’ symbol
 ABSENTRY Entry ; for absolute assembly: mark
; this as applicat. entry point
; Include derivative-specific definitions
 INCLUDE 'derivative.inc'

;********************************************************************
;* Code section                                                     *
;********************************************************************

          ORG   $3000
MULTIPLICAND  FCB 50 ; First Number
MULTIPLIER    FCB 18 ; Second Number
PRODUCT       RMB  2 ; Result of multiplication

;********************************************************************
;* The actual program starts here                                   *
;********************************************************************

        ORG   $4000
Entry:
_Startup:
        LDAA MULTIPLICAND ; Get the first number into ACCA
        LDAB MULTIPLIER   ; Get the second number into ACCB
        MUL               ; Multiply the two of them
        STD PRODUCT       ; and store the sum (from ACCD)
        SWI               ; break to the monitor

;********************************************************************
;* Interrupt Vectors                                                *
;********************************************************************

        ORG   $FFFE
        FDB   Entry ; Reset Vector