E S Programada

DC.L $8000
DC.L START


********************** Registros de la DUART MC68681
**********************
MR1A EQU $EFFC01
MR2A EQU $EFFC01
SRA EQU $EFFC03
CSRA EQU $EFFC03
CRA EQU $EFFC05
RBAEQU $EFFC07
TBA EQU $EFFC07
ACR EQU $EFFC09
ISR EQU $EFFC0B
IMR EQU $EFFC0B
MR1B EQU $EFFC11
MR2B EQU $EFFC11
SRB EQU $EFFC13
CSRB EQU $EFFC13
CRB EQU $EFFC15
RBB EQU $EFFC17
TBB EQU$EFFC17
IVR EQU $EFFC19
***********************
***********************

***********************REGISTROS MODO 1 (MR1A Y MR1B)
***********************
***********************por cada cuantoscaracteres se realiza la interrupcion
***********************
INT_1CAR EQU $00 *interrupcion cada vez q reciba un caracter
INT_3CAR EQU %01000000 *interrupcion cada vez q reciba 3 car√°cteres
car_5bitsEQU %00000000 *numero bits por caracter
car_6bits EQU %00000001
car_7bits EQU %00000010
car_8bits EQU %00000011
*************************
************************************************REGISTROS MODO 2 (MR2A Y MR2B)
***********************
***********************tipo transmision normal o eco
NORMAL EQU %00000000
ECO EQU %01000000

*************************PARA COMPROBAR EL ESTADOPERIFERICO
*************************numero de bit activado
CAR_FIN_ENVIO EQU 3
CAR_ENVIANDO EQU 2
PILA_LLENA EQU 1
CAR_RECIBIDIO EQU 0
REG_TRANS_VACIO EQU 3
**************************************************

*************************PARA reg ACR
*************************seleccion de conjunto
CJTO1 EQU %00000000
CJTO2 EQU %10000000
**************************************************

*************************Registros de control (CRA y CRB)
*************************
CONTROL_NADA EQU $00
REINIC_MR1 EQU $10
REINIC_RECEP EQU $20
REINIC_TRANS EQU $30
REINIC_ERROREQU $40
TRANS_NADA EQU $00
TRANS_H EQU $04
TRANS_I EQU $08
RECEP_NADA EQU $00
RECEP_H EQU $01
RECEP_I EQU $02
*************************
*************************
BUFFER DC.L 'TOY...