************************************************
* FileName:  ex6.asm                        *
* Description: 硬件中断实验                   *
* Copyright(C) SanZhi Electronic, Author Zpin  *
************************************************

  .title  "ex6"
  .global _c_int00
  .mmregs

KEY_ADDR .set 0a008h
D_LED_ADDR .set 0b000h

KEY_CODE1 .set 60h
KEY_CODE2 .set 61h

CONVERT  .macro rawdata
            STM #4000h,AR3
            ANDM #001Fh,rawdata
            LD rawdata,A
            ADD AR3,A
   STL A,AR3
   nop
   nop
   LD *AR3,A
   STL A,rawdata
   nop
   nop
   nop
   nop
   .endm

  .data
  .word 00h,3F06h,0605h,5B04h,4f03h,6602h,6d01h,7d06h,0705h,7f04h,6f03h,07702h,07c01h,3906h,5e05h,07904h,07103h,8002h
        ;BCD CODE  0      1     2     3     4     5     6     7      8    9     a      b      c     d     e      f      .
        ;hight 8 bit enable,low 8 bit is address
        .sect ".vectors"
rst: B _c_int00
  NOP
  NOP
  .space 17*4*16
int2: B _onkey
  NOP
  NOP
  .space 13*4*16

  .text
_c_int00:
  LD #0h,DP
  STM #3000h,SP
  SSBX INTM
  ssbx XF
  STM #07FFFh,SWWSR
  
  ST #0000h,KEY_CODE2
  
  STM #0ffffh,IFR
  ORM #0004h,IMR
  
  RSBX INTM
  

susp: PORTW KEY_CODE2,D_LED_ADDR ;显示到数码管
        rpt #0ffffh
        NOP
  NOP
  B susp
  
_onkey: nop
  rpt #0ffffh
  nop
  nop
  rpt #0ffffh
  nop
  nop
  rpt #0ffffh
  nop
  nop
  rpt #0ffffh
  nop
  nop

  PORTR KEY_ADDR,KEY_CODE2 ;读取按键
  CONVERT KEY_CODE2            ;将按键码转换成显示码
exit rpt #0ffffh
  nop
  nop
  rpt #0ffffh
  nop
  nop
  rpt #0ffffh
  nop
  nop
  STM #0ffffh,IFR
  RETE