clr   ea         ;Disable Interrupts
  mov   dph,#0C0H  ; Address FDC
  mov   a,#55H     ;  Init Config Signal
  movx  @dptr,a    ;   Begin Config Operations
  movx  @dptr,a

;  *** DPTR is pointing to FDC Base REG (0C0H) ***
 
  clr   a          ;Init CR0 Register address
  movx  @dptr,a    ; Latch CR1 address
  inc   dph        ;  Port to Data Port 1
  mov   a,#3FH     ;   Init CR0 Initial Value
  movx  @dptr,a    ;    Update CR0

; *** Update next Configuration Register ***

  mov   dph,#0C0H  ;Re-address FDC Base Reg
  mov   a,#1       ; Init CR1 Reg address
  movx  @dptr,a    ;  Latch CR1 Register Addr.
  inc   DPH        ;   Address the Data Port 1
  mov   a,#9FH     ;    Update CR2
  movx  @dptr,a

;  *** continue thru all CRx Registers ***

  mov   dph,#0C0H  ;Re-address Port 0
  mov   a,#0AAH    ; Init the Config Terminator
  movx  @dptr,a    ;  Indicate Config Complete

  setb  ea         ;Enable Global Interrupts
  ret              ; Exit