17 lines
189 B
Plaintext
17 lines
189 B
Plaintext
rcsr = 177560
|
|
rbuf = 177562
|
|
xcsr = 177564
|
|
xbuf = 177566
|
|
|
|
.psect .txt
|
|
.title echo
|
|
start:
|
|
tstb @#rcsr
|
|
bmi start
|
|
mov @#rbuf,r1
|
|
xor r1,#40
|
|
mov r1,@#xbuf
|
|
br start
|
|
.byte 123
|
|
.end start
|