Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site charm.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxl!aluxe!mhuxi!charm!slag From: slag@charm.UUCP (Peter Rosenthal) Newsgroups: net.micro.cbm Subject: Re: music application for the c64 Message-ID: <434@charm.UUCP> Date: Wed, 15-Aug-84 10:19:55 EDT Article-I.D.: charm.434 Posted: Wed Aug 15 10:19:55 1984 Date-Received: Thu, 16-Aug-84 02:44:26 EDT References: <185@bonnie.UUCP> Organization: Physics Research - AT&T Bell Labs MH Lines: 16 byte the bug The two joystick ports of the commodore 64 are both bidirectional parallel ports with bit selectable data direction. You should be able to program one of the ports as an output port and use it to control a d to a converter. By the way, another way of detecting the drum signal would be to put it on an interrupt line, the same way that the joystick trigger button interrupts the cpu. This will cut the requirement for continued polling of the drum line. This would allow you to increase the sampling frequency on your d to a or a to d converters.