Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!oberon!bbn!uwmcsd1!marque!uunet!mcvax!unido!tub!tmpmbx!netmbx!hase From: hase@netmbx.UUCP (Hartmut Semken) Newsgroups: comp.sys.atari.st Subject: Re: (none) Message-ID: <1968@netmbx.UUCP> Date: 23 Jun 88 00:42:37 GMT References: <8806140047.AA18091@ucbvax.Berkeley.EDU> Reply-To: hase@netmbx.UUCP (Hartmut Semken) Organization: netmbx Public Access Unix, Berlin Lines: 14 In article <8806140047.AA18091@ucbvax.Berkeley.EDU> U0179@DGOGWDG5.BITNET ("GWDGV1::WHUEBNER") writes: >Two questions about ST hardware: >2) Does anyone know, how far the DMA chip can address in memory ? I once wrote an adress immediatly after the 4 Megabytes to (physbase). The system crashed. The Shifter and DMA chips appear to "borrow" their adress counter from the "MMU" chip; the registers seem to be 12 bit wide (right, Atari?) hase -- Hartmut Semken, Lupsteiner Weg 67, 1000 Berlin 37 hase@netmbx.UUCP High on a rocky promontory sat an Electric Monk on a bored horse. (D. Adams)