8-Bit I/O Function - Boser HS-2613 Manual

3.22 8-bit I/O Function

The HS-2613 offers one 8-bit input/output port by parallel port.
CN19: 8-bit Input/Output
PIN Description PIN Description
1 VCC
3 GD0
5 GD1
7 GD2
9 GD3
.286
.MODEL SMALL
.DATA
port equ
.CODE
print macro
mov
mov
int
endm
delay :
push
mov
@@:
jmp
push
mov
wait1: loop
pop
loop
pop
ret
begin proc
mov
mov
STI
Mov
Mov
;;--------------------
;;ROR
mov
@@:
24
2 GND
4 GD4
6 GD5
8 GD6
10 GD7
;this is data area
0378h ;print port can be change to 278h
buff
dx, offset buff;
ah,09h
21h
cx
cx,0155h
$+2
cx
cx,0ffffh
wait1
cx
@b
cx
near
ax,@data
ds,ax
dx, port
al, 80h out
cx, 08h
9 1
10 2
dx, al