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From: shamash@cs.columbia.edu (Ari Shamash)
Newsgroups: comp.os.minix
Subject: out_word()..
Message-ID: <1990Oct7.230737.3421@cs.columbia.edu>
Date: 7 Oct 90 23:07:37 GMT
Sender: news@cs.columbia.edu (The Daily News)
Reply-To: shamash@cs.columbia.edu (Ari Shamash)
Organization: Columbia University Computer Science Dept
Lines: 32

I am currently writing a device driver for a controller that
inputs/outputs words at a time, instead of bytes.

So, I took _out_byte from klib.x, and attempted to convert it to
_out_word.  I don't know much about either '386 assembly or how
arguments are placed and removed from the stack, so I'm not sure if
this is correct or not.  Should this work????

_out_byte:
	pop	bx
	pop	dx		| port
	pop	ax		| value
	sub	sp,#2+2
	out			| output 1 byte
	jmp	(bx)

_out_word:
	pop	bx
	pop	dx		| port
	pop	ax		| value
	sub	sp,#2+2
	outw			| output 1 word (??)
	jmp	(bx)

I'm working on a PS/II model 80, if that makes any difference.  This
code should run in the 16bit protected mode..

Thanks,
Ari
--
shamash@cs.columbia.edu
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