Newsgroups: comp.sys.apple2 Path: news.weeg.uiowa.edu!news.uiowa.edu!hobbes.physics.uiowa.edu!newsrelay.iastate.edu!vixen.cso.uiuc.edu!howland.reston.ans.net!pipex!uunet!munnari.oz.au!comp.vuw.ac.nz!actrix.gen.nz!dempson From: dempson@swell.actrix.gen.nz (David Empson) Subject: Re: cable throughput Organization: Actrix Information Exchange Date: Thu, 27 Jan 1994 11:08:36 GMT Message-ID: References: <1994Jan26.015047.28456@yuma> Sender: dempson@actrix.gen.nz (David Empson) Lines: 59 In article <1994Jan26.015047.28456@yuma> thunder@lamar.ColoState.EDU (James Riddle) writes: > > Can anyone tell me what the pin to pin throughput is on the > GS to ImageWriter I cable? PLEASE? I can't find one of these cables > in town and would like to get my HP Deskjet 500 working SOON. Looking at the IIgs serial connector, the pins are numbered as follows: 8 7 6 5 4 3 2 1 The signals on each pin are: 1 Handshake Out (DTR) 2 Handshake In (DSR) 3 Transmit Data minus 4 Signal Ground 5 Receive Data minus 6 Transmit Data plus 7 General purpose input (DCD) 8 Receive Data plus Shield is frame ground. The ImageWriter I or DeskJet 500 has a female DB-25 connector, arranged in the standard order for a DTE (Data Terminal Equipment), i.e. 1 Frame Ground 2 Transmit Data 3 Receive Data 4 Request to Send (output from printer, probably not used) 5 Clear to Send (input to printer, probably not used) 6 Data Set Ready (input to printer) 7 Signal Ground 8 Carrier Detect (input to printer, probably not used) 20 Data Terminal Ready (output from printer) The pinout of the cable is: IIgs (Mini-Din-8 male) Printer (DB-25 male) 1 (HShk Out) 6 (DSR) 2 (HShk In) 20 (DTR) 3 (TxD-) 3 (RxD) 4 (Gnd) 7 (Gnd) 5 (RxD-) 2 (TxD) 6 (TxD+) no connection 7 (DCD) no connection 8 (RxD+) must be conected to signal ground (IIgs pin 4, printer pin 7) If you have a shielded cable, also connect the cable shield to the Mini-Din-8 plug's shielding, and to pin 1 and the shield of the DB-25. -- David Empson dempson@swell.actrix.gen.nz Snail mail: P.O. Box 27-103, Wellington, New Zealand