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#Replacement mice…

8 messages in this thread

#111939From: Brian BartlettJul 10, 1990 5:11 PM

Andrew, ok, I found the table you were looking at, so now our terms can match <grin>. There is a schematic in the back of your A2000 owners manual, in appendix F. I'm looking at pages F-4 and F-13. I agree with you that something is decidely odd about pin 1, so I'd suspect U202 as the faulty chip. For the life of me, I can't see how the 8520's are involved at all, and I'm almost blind tracing some of these signals around ;-). Again, good luck on it. Brian J. Bartlett

#112177From: Andrew RakowskiJul 11, 1990 10:02 AM

Brian, I suspect that we have different Amiga 2000 manuals. Mine is entitled "Introduction to the Commodore Amiga 2000" Copyright 1987. The schematics are on pages F-3 through F-12 (there is no F-14 here!) The drawings also do NOT have any revision or date information on them ("see sheet 1" they say, and sheet 1 doesn't have any info either!) According to my schematics, it looks like (from page F-8) the mouse connections (J11 and J12) head into U74 (a 74hct157), with connections also to ground via 0.01p CAPs, and to 5v via 27K resistors (RES pack RN11). After all that, the signals head (indirectly) to both PAULA and DENISE. I think what I will do is take my 2000 to the dealer, and agree to buy the 8520 when he shows me that replacing it actually makes a difference! I agree with you that it doesn't look like it should… I'll let you know what happens… L'andrew "Hey in there! Open up. Your door knocker fell off!"

#112252From: Henry ForteJul 11, 1990 7:32 PM

well for a fact for almost any ibm buse mouse can be made into an amiga mouse… i have a keytronics bus mouse on my 2000 much better the the oem mouse….

#112329From: Mike SchillerJul 12, 1990 1:50 AM

Jennifer: What does it take to make an IBM Buss mouse into an Amiga mouse? -Mike Schiller In sunny Fort Lauderdale

#112355From: Andrew RakowskiJul 12, 1990 8:04 AM

I didn't realize you could use IBM bus mice on the Amiga…Does it require a special cable, or just plug and go? L'andrew "Hey in there! Open up. Your door knocker fell off!"

#112470From: Henry ForteJul 12, 1990 8:40 PM

No you can't just plug it in you must change the plug configuration

#112451From: JAMES D. WILLIAMSJul 12, 1990 7:29 PM

Really?? How did you manage this feat? How about uploading a text "how I did it" file? –Eet– Director of Mayhem Extra Terrestrial Imports, Ltd.

#112471From: Henry ForteJul 12, 1990 8:42 PM

No problem i do sell replacement mice …. like for now while our supplies last it is just $40 + shipping and handling if you can do it yourself it is $30 +shiping and handling +instructions