22 lines
379 B
ArmAsm
Executable File
22 lines
379 B
ArmAsm
Executable File
! outsb() - Output a byte array Author: Kees J. Bot
|
|
! 18 Mar 1996
|
|
! void outsb(U16_t port, void *buf, size_t count);
|
|
|
|
.sect .text
|
|
.define _outsb
|
|
_outsb:
|
|
push bp
|
|
mov bp, sp
|
|
cld
|
|
push si
|
|
mov dx, 4(bp) ! port
|
|
mov si, 6(bp) ! buf
|
|
mov cx, 8(bp) ! byte count
|
|
jcxz 1f
|
|
0: lodsb ! read 1 byte
|
|
outb dx ! output 1 byte
|
|
loop 0b ! many times
|
|
1: pop si
|
|
pop bp
|
|
ret
|