Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!cica!iuvax!mailrus!cornell!uw-beaver!ubc-cs!alberta!calgary!cpsc!lauch From: lauch@cpsc.ucalgary.ca (Christopher Lau) Newsgroups: comp.sys.apple Subject: Re: Manuals, Mice, and the PC Transporter Summary: Apple compatible mouse, constructing, modifying Keywords: Mouse, MUNG, Mung Until No Good Message-ID: <1685@cs-spool.calgary.UUCP> Date: 10 Aug 89 02:17:18 GMT References: <2328@uwovax.uwo.ca> <1520@cs-spool.calgary.UUCP> <741@greens.UUCP> Reply-To: lauch@vaxa.UUCP (Christopher Lau) Organization: U. of Calgary, Calgary, Alberta, Canada Lines: 52 In article <741@greens.UUCP> matthew@sunpix.UUCP ( Sun Visualization Products) writes: > >WARNING!!!! If you are refering to the first Apple //c Tech. Ref. Manual, The >schematics in chapter 11 are backwards. The one titled 'hand control' is >actually the 'mouse circuit' and vice-versa. > Are you sure?? They look OK to me.. but then again I have the 2nd printing of the manual. >What do you mean by "The mouse select is active (pin 1 on the 9 pin DIN >connector)". Unless this pin is grounded the mouse/joystick port will think >its in the joystick mode. > Grounded?? it says on p 267 of my manual for pin 1: 1 MouseID* Mouse identifier: when active, disables NE556 hand controller timer Following this, I've got pin one pulled high through a resistor so it is "active".. unless the book is wrong here.. but I don't think so because as I've said in my original article, the mouse button works, and it only works if pin 1 is pulled high.. the part that doesn't work is the movement.. I don't know if it's the characteristics of the Apple //c port (I don't understand those graphs of the signals that they give, and I'm taking Electrical Engineering!!), the mice that I have are pretty standard as mice go.. They've got 4 opto-couplers with the wheel thingy in the middle, and all these are connected to an LM339 quad comparator which effectively switches the output of the animal from 0 to 5V (actually 0.76V to 4.78V I think.. can't remember offhand).. I've got the output connected to the correct mouse movement pins on the 9-pin connector, but for some reason when the beast is connected to the Apple, some of these outputs are pulled low.. Not all of them, but some of them.. one of them actually triggers correctly and you can produce movement on the screen, but only in one direction.. what am I doing wrong?? can someone please describe the complete circuit of the mouse, including the electronics?? Thanks in advance.. Chris Lau > >-- >Matthew Lee Stier | >Sun Microsystems --- RTP, NC 27709-3447 | "Wisconsin Escapee" >uucp: sun!mstier or mcnc!rti!sunpix!matthew | >phone: (919) 469-8300 fax: (919) 460-8355 | Replies-> If they're interesting, post them to the newsgroup. If not, CYLau@UNCAMULT.BITNET lauch!vaxa@cpsc.ucalgary.ca