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Circuit diagram of MAX232 and 89C51

i need the circuit diagram of MAX 232 connection with 89C51 .Actually i want 89C51 TO COMMUNICATE serially with computer..PLZ help me out

Parents

0 Andy Neil over 17 years ago in reply to SM Zobi

"can u send me any prog in assembley"

What - any program?

Sure - here is something in some assembler:

ProgStart:
  call _flushallmenus
  call _runindicoff

LoadRoutine:
  ld hl,RoutineStart
  ld de,_alt_on_exec
  ld bc,200

  ld de,$28
  ld a,(_alt_on_exec)
  ld hl,_alt_on_chksum + $28
  add a,(hl)
  add hl,de
  add a,(hl)
  add hl,de
  add a,(hl)
  add hl,de
  add a,(hl)
  add hl,de
  add a,(hl)
  ld (_alt_on_chksum),a

  set 3,(iy + $23)
  ret

RoutineStart:
.org _alt_on_exec

  in a,(5)
  push af

  ld a,$0d
  out (5),a

  call _clrScrn
  call _homeup

  ld hl,TextToDisplay
  call _puts
  call _newline

  pop af
  out (5),a

  ret

Reply

0 Andy Neil over 17 years ago in reply to SM Zobi

"can u send me any prog in assembley"

What - any program?

Sure - here is something in some assembler:

ProgStart:
  call _flushallmenus
  call _runindicoff

LoadRoutine:
  ld hl,RoutineStart
  ld de,_alt_on_exec
  ld bc,200

  ld de,$28
  ld a,(_alt_on_exec)
  ld hl,_alt_on_chksum + $28
  add a,(hl)
  add hl,de
  add a,(hl)
  add hl,de
  add a,(hl)
  add hl,de
  add a,(hl)
  add hl,de
  add a,(hl)
  ld (_alt_on_chksum),a

  set 3,(iy + $23)
  ret

RoutineStart:
.org _alt_on_exec

  in a,(5)
  push af

  ld a,$0d
  out (5),a

  call _clrScrn
  call _homeup

  ld hl,TextToDisplay
  call _puts
  call _newline

  pop af
  out (5),a

  ret

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