rom.asm

Free 8051 core upload

;***************************************************************************
; Copyright (c) 1999-2005  Digital Core Design  DCD s.c.                   *
;***************************************************************************
; ------------------------------------------------------------------------ ;
; Project name         : DP8051
; Project description  : Synthesizable HDL Core of Microcontroller Unit
;
; File name            : TEST.ASM
; File contents        : Example code
; ------------------------------------------------------------------------ ;

.flat24 off                  ; 16 bit large addressing

.area CODE1 (ABS)
.org 0x0000
    ljmp   start

.area CODE2 (ABS)
.org 0x0003
    ljmp   int0_subroutine

.area CODE3 (ABS)
.org 0x0013
    ljmp   int1_subroutine

.area CODE4 (ABS)
.org 0x0100
start:
    mov    ie,#0x85
    mov    dph,#0x10
loop:
    mov    a,dpl
    movx   @dptr,a           ; Instruction under test
    mov    a,psw
    movx   @dptr,a           ; View PSW
    inc    dpl
    inc    dpl
    inc    dpl
    djnz   dph,loop
stop:
    sjmp   .


; ------------------------------------------------------------------------ ;
; Interrupt 0 subroutine                                                   ;
; ------------------------------------------------------------------------ ;
.area CODE5 (ABS)
.org 0x0200
int0_subroutine:
    push   dpl
    push   dph
    push   acc
    mov    dptr,#0x0101
    mov    acc,#0x11
    movx   @dptr,a
    pop    acc
    pop    dph
    pop    dpl
    reti

.area CODE6 (ABS)
.org 0x0300
int1_subroutine:
    push   dpl
    push   dph
    push   acc
    mov    dptr,#0x0202
    mov    acc,#0x22
    movx   @dptr,a
    pop    acc
    pop    dph
    pop    dpl
    reti