A82: Reset of keyboard

A82: Reset of keyboard

• To: assembly-82@lists.ticalc.org
• Subject: A82: Reset of keyboard
• From: Eric Piel <pieleric@etu.utc.fr>
• Date: Thu, 16 Mar 2000 11:39:52 +0100 (MET)
• In-Reply-To: <Pine.OSF.4.02.10003141050020.21925-100000@vega.utc.fr>
• Reply-To: assembly-82@lists.ticalc.org

Hi
Writing additional code in the Key handler of BMMP I remind the fact that it is
necesary to reset the keyboard port by sending ff before every scanning.
for instance:
        ld	a,0ffh				; reset keyport
        out	(P_KEYBOARD),a			; necessary code?
	ld	a,%11101111
	out	(P_KEYBOARD),a			; Mask out 0/4
	in	a,(P_KEYBOARD)

I'd like to know if it has to be send every time or not and why.
BTW has someone done more advance investigations about this subject?

Eric

• Re: A82: Reset of keyboard
• From: Jeremy Wazny <j.wazny@ugrad.unimelb.edu.au>
• A82: Re: Reset of keyboard
• From: "Dines Justesen" <dines@aub.dk>

• Re: A82: Re: Bomberman Multiplayer
• From: Eric Piel <pieleric@etu.utc.fr>

• Prev: Re: A82: Re: Bomberman Multiplayer
• Next: Re: A82: Reset of keyboard
• Index(es):
  • Main
  • Thread