Article View: comp.sys.mac
Article #7015Re: BUilding a Hard Drive
From: Fred Schulz
Date: Tue, 24 Oct 1989 20:11
Date: Tue, 24 Oct 1989 20:11
49 lines
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1533 bytes
In article <TJFS.89Oct24130840@tadtec.uucp>, tjfs@tadtec.uucp (Tim Steele) writes: > Can anyone post details of the cable that connects a normal 50 way IDC > SCSI port like on the Quantum drive to the D connector on the back of > a Mac SE? > 50 pin 25 pin signal ------ ------ ------ 2 8 db0 4 21 db1 6 22 db2 8 10 db3 10 23 db4 12 11 db5 14 12 db6 16 13 db7 18 20 dbp (parity) 20 n/c 22 " 24 " 26 25 trmpwr 28 n/c 30 " 32 17 atn 34 n/c 36 6 bsy 38 5 ack 40 4 rst 42 2 msg 44 19 sel 46 15 c/d 48 1 req 50 3 i/o 1-49odd 7,9,14,16,18,24 gnd - connect each of the 6 pins on db25 to any exc. 25 odd pins on the 50 pin connector except pin 25 (so if the connector gets flipped you dont ground the +5V) Easiest solution: use ribbon cable from 50 pin on drive to 50 pin centronics Then buy ready-made 50pin centronics to db25 cable. > Thanks! > > Tim > -- > tjfs@tadtec.uucp ..!uunet!mcvax!ukc!tadtec!tjfs > Tadpole Technology plc, Titan House, Castle Park, CAMBRIDGE, CB3 0AY, UK > Phone: +44-223-461000 Fax: +44-223-460727 Telex: TADTEC G
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arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!ginosko!gem.mps.ohio-state.edu!lavaca.uh.edu!uhnix1!elroy!chee77References:
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!ginosko!gem.mps.ohio-state.edu!lavaca.uh.edu!uhnix1!elroy!chee77 From: CHEE77@elroy.uh.edu (Fred Schulz) Newsgroups: comp.sys.mac Subject: Re: BUilding a Hard Drive Message-ID: <4154@elroy.uh.edu> Date: 24 Oct 89 20:11:59 GMT References: <3379@nmtsun.nmt.edu> <TJFS.89Oct24130840@tadtec.uucp> Organization: University of Houston Lines: 49