From caen!batcomputer!munnari.oz.au!metro!news.cs.uow.edu.au!news.cs.uow.edu.au!not-for-mail Thu Sep 23 21:59:45 EDT 1993 Article: 62305 of comp.sys.apple2 Path: caen!batcomputer!munnari.oz.au!metro!news.cs.uow.edu.au!news.cs.uow.edu.au!not-for-mail From: david@wraith.cs.uow.edu.au (David E A Wilson) Newsgroups: comp.sys.apple2,misc.wanted,comp.sys.ibm.pc.hardware Subject: Re: ** WANTED: PINOUTS.....Please read! Date: 17 Sep 1993 09:53:10 +1000 Organization: University of Wollongong, NSW, Australia. Lines: 71 Message-ID: <27au96$sio@wraith.cs.uow.edu.au> References: NNTP-Posting-Host: wraith.cs.uow.edu.au Xref: caen comp.sys.apple2:62305 misc.wanted:32415 comp.sys.ibm.pc.hardware:80049 bitzm@columbia.dsu.edu (MICHAEL BITZ) writes: >Hello. I am in need of a list of pin configurations for the following ports: >* Centronics parallel printer (such as a Panasonic KX-P1123, etc) >* Standard RS-232 Serial port >* Laser 128 Parallel printer port (15-pin) >* Laser 128 Serial modem port (5-pin round) The Laser pinouts would require a Laser manual (which I do not have). The first two are available in any good reference. For example I have a catalog from CommsWare and in the data section at the back we find: RS-232/V.24 Interface EIA CCITT To Description Pin number RS-232 V.24 ---------------------------------------------------------- AA 101 Frame Ground 1 BA 103 DCE Transmit Data 2 BB 104 DTE Receive Data 3 CA 105 DCE Request To Send 4 CB 106 DTE Clear To Send 5 CC 107 DTE Data Set Ready 6 AB 102 Signal Ground 7 CF 109 DTE Data Carrier Detect 8 +Test Voltage 9 -Test Voltage 10 Unassigned 11 SCF 122 DTE 2nd Data Carrier Detect 12 SCB 121 DTE 2nd Clear To Send 13 SBA 118 DCE 2nd Transmit Data 14 DB 114 DTE Transmit Clock (DCE) 15 SBB 119 DTE 2nd Receive Data 16 DD 115 DTE Receive Clock (DCE) 17 DCE Receiver Dibit Clock 18 SCA 120 DCE 2nd Request To Send 19 CD 108.2 DCE Data Terminal Ready 20 CG 110 DTE Signal Quality Detect 21 CE 125 DTE Ring Indicator 22 CH/I 111/2 DCE Data Rate Select 23 DA 113 DCE External Transmit Clk 24 DCE Busy 25 For DCE read Modem and for DTE read Terminal. ========================================================================= Centronics/Parallel Interface Signal 36 way connector IBM 25 way connector To ------------------------------------------------------------------ Data Strobe 1 1 Printer Data Bit 1-8 2-9 2-9 Printer Acknowledge 10 10 Computer Busy 11 11 Computer Paper End 12 12 Computer Select 13 13 Computer AutoFeed 14 (may be Gnd) 14 Printer OSCXT 15 Logic Gnd 16 Chassis Gnd 17 +5 18 Data Strobe Gnd 19 Data Bit Gnds 20-27 18-25 Acknowledge Gnd 28 Busy Gnd 29 Input Prime Gnd 30 Input Prime 31 16 Printer Fault 32 15 Computer Unassined 33-35 Select Input 36 17 Printer -- David Wilson +61 42 213802 voice, +61 42 213262 fax Dept Comp Sci, Uni of Wollongong david@cs.uow.edu.au -=-=-=-=-=-=-=-=-=-=-=-= Hey I just happen to have my Apple II SSC Installation and Operating Manual with me. On page 98, under the section called Connector Pin Assignment: 10-pin DB-25 header Connector Signal name ------ --------- ------------ 1 1 Frame Ground 2 2 Transmit Data (TXD) 3 3 Receive Data (RXD) 4 4 Request to Send (RTS) 5 5 Clear to Send (CTS) 6 6 Data Set Ready (DSR) 7 19 Secondary Clear to Send (SCTS) 8 7 Signal Ground 9 20 Data Terminal Ready (DTR) 10 8 Data Carrier Detect (DCD)