Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!mcvax!diku!daimi!agesen From: agesen@daimi.UUCP (Ole Agesen) Newsgroups: comp.sys.atari.st Subject: IOTRANSFER & interrupts. Message-ID: <850@daimi.UUCP> Date: Wed, 15-Jul-87 09:38:07 EDT Article-I.D.: daimi.850 Posted: Wed Jul 15 09:38:07 1987 Date-Received: Sat, 18-Jul-87 04:42:29 EDT Reply-To: agesen@daimi.UUCP (Ole Agesen) Distribution: world Organization: DAIMI: Computer Science Department, Aarhus University, Denmark Lines: 13 I'm quite new to this newsgroup, so maybe this problem already has been discussed. Anyway ... I'm writing a program on the 520 ST (1 MByte RAM) using TDI Modula-2/ST. The program have to multitask. I hope it'll be possible to use the standard modula statement IOTRANSFER in a scheduler. But, but, ... here is my problem: I don't know, which device to use to generate periodic interrupts (50-200 pr second would be fine). There should be a Timer-A somewhere. The XBIOS-functions don't seem of much help - or perhaps I just don't understand 'em well enough. Can anyone help me to some info about Timer-A (control/data-register?, interruptvector?, how to access it), or even better: has anyone used multitasking in modula-2 on the ST.