Article View: comp.sys.atari.st
Article #5891Re: Atari TT Block Diagram
From: Hartmut Semken
Date: Sat, 18 Nov 1989 15:54
Date: Sat, 18 Nov 1989 15:54
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1690 bytes
In article <10132@stag.math.lsa.umich.edu> hyc@math.lsa.umich.edu (Howard Chu) writes: >Ah-hah! So, the WD1772/2793 is the magic part number, eh? What'll it >take to put one of these in an ST for 1.4MB floppy capability? Does >anyone here have access to Western Digital folks for pinouts & other >specs for this chip? Well, You want to have an 1.44 Meg drive for the ST? It's really easy: just switch the clock frequency of the WD1772 to 16 MHz (taken from the shifter) and attach a high density drive (like the TEAC FD 235 HFN). Set the seekrate for the drive to 6 Milliseconds (will become 3 with the doubled clock). Format high density disks with my little formatter (posted here). A high density 5.25 inch drive is possible too. But these have no automatic HD-recognition... Works well for me. hase -- Hartmut Semken, Lupsteiner Weg 67, 1000 Berlin 37 hase@netmbx.UUCP Dennis had stepped up into the top seat whet its founder had died of a lethal overdose of brick wall, taken while under the influence of a Ferrari and a bottle of tequila. (Douglas Adams; the long dark teatime...)
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Path: arc1-ca.pugleaf.net!utzoo!yunexus!ists!jarvis.csri.toronto.edu!mailrus!uunet!cs.utexas.edu!think!snorkelwacker!bloom-beacon!eru!luth!sunic!mcsun!unido!tub!tmpmbx!netmbx!hase From: hase@netmbx.UUCP (Hartmut Semken) Newsgroups: comp.sys.atari.st Subject: Re: Atari TT Block Diagram Message-ID: <3779@netmbx.UUCP> Date: 18 Nov 89 15:54:53 GMT Article-I.D.: netmbx.3779 References: <8911150802.AA02649@ucbvax.Berkeley.EDU> <10132@stag.math.lsa.umich.edu> Reply-To: hase@netmbx.UUCP (Hartmut Semken) Organization: netmbx Public Access Unix, Berlin, West Germany Lines: 28