NorthStar HSIO-4 User's & Technical Manual page 35

0000
0000
0000
0010
0010
0014
0018
001C
0000
0001
0001
0001
0001
0000
0000
0001
0002
0003
0000
0000
0000
0000
0000 DB13
0002
E602
0004 28FA
0006 DB12
0008 E67F
OOOA C9
OOOB
OOOB
DB13
OOOD E601
OOOF 28FA
0011 78
0012 D313
0014 C9
0015
0015
0015
0015
0015
DB17
0017 E602
0019 28FA
001B DB16
001D E67F
001F C9
0020
0020 DB17
0022
E601
0024 28FA
78
0026
0027 D317
0029 C9
002A
North Star HSIO-4
; Sample asynchronous I/O routines for HSIO-4
/
•
r
BASE EQU 10H
PORTA EQU BASE+00H
PORTB EQU BASE+04H
PORTC EQU BASE+08H
PORTD EQU
BASE+0CH
t
•
BAUDA
EQU 1
BAUDB EQU 1
BAUDC EQU 1
BAUDD EQU 1
f
•
BAUD
EQU 0
MADK EQU 1
UDAT
EQU 2
USTA EQU 3
•
f
t
•
; Port A input and output routines
r
•
CINA IN
PORTA+USTA
AN I 2
JRZ CINA
IN PORTA+UDAT
AN I 7FH
RET
• /
COUTA IN PORTA+USTA
AN I
1
JRZ
COUTA
MOV A, B
OUT
PORTA+USTA
RET
•
f
r
•
; Port B input and output routines
i
•
CINB IN PORTB+USTA
AN I
2
JRZ CINB
IN PORTB+UDAT
AN I 7FH
RET
t
•
COUTB IN
PORTB+USTA
AN I 1
JRZ COUTB
MOV A, B
OUT PORTB+USTA
RET
i
•
;Address of HSIO-4
;Address of port A
;Address of port B
;Address of port C
;Address of port D
?Baud rate for port A of 9600
;Baud rate for port B of 9600
;Baud rate for port C of 9600
;Baud rate for port D of 9600
;Baud rate set
;Interrupt mask set
;USART data
;USART status
;Check USART status
;Get RxReady bit
;Wait till character ready
;Read character
;Mask off top bit
;Check USART status
;Get TxReady bit
;Wait till ready
;Output char is in B reg
;Output character
;Check USART status
;Get RxReady bit
;Wait till character ready
;Read character
;Mask off top bit
;Check USART status
;Get TxReady bit
;Wait till ready
;Output char is in B reg
;Output character
30
User/Technical Manual