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0000
0000
0000
0002
0003
0010
0016
0000
0001
0002
0000
0010
0010
0012
0013
0000
0000
0000
3E03
0002
D310
0004
3E80
D313
0006
0008
D313
000A
3E40
oooc
D313
000E
000E
3E0C
0010
D313
3E10
0012
0014
D313
3E16
0016
0018
D313
001A
3EB7
D313
001C
001E
DB12
0020
C9
North Star HSIO-4
; Sample routines to
/
•
•
STX
EQU
2
ETX
EQU
3
DLE
EQU
10H
16H
SYN
EQU
•
TXRDY
EQU
1
RXRDY
EQU
2
•
PORTA
EQU
10H
PORTA
BAUD
EQU
EQU
PORTA+2
DATA
CTRL
EQU
PORTA+3
•
i
o
INIT
MV I
A, 3
OUT
BAUD
MV I
A, 80H
OUT
CTRL
OUT
CTRL
MV I
A, 40H
OUT
CTRL
•
r
MV I
A, 0CH
OUT
CTRL
MV I
A,DLE
OUT
CTRL
MV I
A, SYN
OUT
CTRL
MV I
A,0B7H
OUT
CTRL
IN
DATA
RET
use HSIO-4 for synchronous operation
; Start of text character
; End of text character
; Data Link Escape character
; Sync character
; USART status bits
Set for HSIO-4 port A
Baud rate for port A
USART data address
USART control/status
; Set data rate to 2400*16
; for HSIO-4
; Ensure USART is cleared
; as specified by manufacturers
; do reset
; Double sync, no parity
; Sync character #1
; Sync character #2
; Hunt,RTS,Error reset,RxE,DTR,TxE
; Read junk
47
User/Technical Manual
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