Path: news1.icaen!news.uiowa.edu!NewsNG.Chicago.Qual.Net!nyd.news.ans.net!newsfeeds.ans.net!news.idt.net!newsfeed.cwix.com!192.26.210.166!sunqbc.risq.qc.ca!news.uow.edu.au!david From: david@uow.edu.au (David Wilson) Newsgroups: comp.sys.apple2 Subject: Re: PC transporter drives Date: 13 Nov 98 02:00:48 GMT Organization: University of Wollongong, Australia Lines: 54 Message-ID: References: NNTP-Posting-Host: wraith.cs.uow.edu.au X-Trace: wyrm.its.uow.edu.au 910923223 17278 130.130.64.1 (13 Nov 1998 02:13:43 GMT) X-Complaints-To: usenet@wyrm.its.uow.edu.au NNTP-Posting-Date: 13 Nov 1998 02:13:43 GMT X-Newsreader: NN version 6.5.0 #15 (NOV) Xref: news1.icaen comp.sys.apple2:141718 gospodin@clubi.ie (Vincent Quinn) writes: >As there have been a few postings about PC Transporter recently, I thought >I'd make my contribution. >_Firstly_, I want to hook up a standard PC 360K, 5.25 floppy drive as drive B >(I have an Apple 3.5 as drive A). Problem is, I don't have a complete pinout. Mini/Micro Floppy Interface Pin# Description Alternate Functions ---- ----------- ------------------- 1 GND Eject, Disk Change Reset 3-33 Odd pins are GND 2 High Density 4 Head Load In Use, Eject 6 Drive Select 3 8 Index Pulse + 10 Drive Select 0 Motor On A \ IBM twisted 12 Drive Select 1 Drive Select B \ cable - both 14 Drive Select 2 Drive Select A / drives are 16 Motor On Motor On B / strapped DS1 18 Direction 20 Step 22 Write Data 24 Write Enable 26 Track Zero + 28 Write Protect + 30 Read Data + 32 Select Head 34 Disk Changed + Ready + + signal from drive to controller >I'm assuming that the pinout of the PCT 19-pin drive connector is the same >as >that of the IIGS SmartPort (that's logical, since Apple 3.5 drives work >perfectly with the PCT) and that the 5.25 drive comes first in the chain >(as >indicated by the PCT manual). So a 19-pin pass-through connector needs to >be >added at the rear of the PC drive for chaining the Apple 3.5" drive to. OK. Hang on, there is no way you are going to be able to connect a PC 360KB drive to an Apple 19 pin disk port (well, I do have a drive that is a standard PC style drive with an adapter board that makes it emulate a Disk ][ drive) and read PC 360KB disks. Apple 5.25" drives use the 4 step lines to manually step the head in or out. IBM 5.25" drives hold the Direction line high or low and send a single pulse on the Step line to move the head in or out. Ditto for IBM 3.5" drives. Apple 3.5" drives use the 4 step lines to select a comand and another line to strobe it into the drive (or something like that). -- David Wilson School of IT & CS, Uni of Wollongong, Australia david@uow.edu.au