-=> Allen Prunty wrote to Dave Drum <=-   
      
    AP> I don't know if this will fix it but I have access to a couple of   
    AP> broken C64s that may fit the bill.   
      
    AP> Allen   
      
    AP> ---   
      
    AP> This text file describes what to do in order to fix Amiga 500(if one   
    AP> of the CIA's is dead) with the parts taken from broken Commodore 64.   
      
    AP> I SHALL STATE THAT THIS IS A HACK, ITS A HACK! ITS A HACK!!! HOWEVER   
    AP> CONFIRMED, IT WORKS FOR ME.   
      
     8<------- EDITING BEING DONE HERE ----->B   
      
    AP> In C 64 there are also two CIA's and they are at (locations according   
    AP> to new pcb) U1 and U2 they have printed 6526B on them. So now you just   
    AP> need to desolder one of them or both, clean up the pins and put in your   
    AP> Amiga in place of B one. The pinouts are same so nothing can go wrong.   
      
   Unless you leave the hot iron on them too long. Many of the chips from the   
   C=64 era were VERY heat sensitive. And never mind how I know that.   
      
    AP> There are several mothods to strip the chip from pcb. I used ordinary   
    AP> soldering iron and the simple sucking device to pick the tin. If you   
    AP> got no such tools then you may use simple handy gas burner directly on   
    AP> the pins from some distance. But before doing this set the nozzle not   
    AP> to cut but to distribute the heat smoothly. Then try to toggle the   
    AP> burner form one side to another and if you notice tin melting grab the   
    AP> ic - be cautious its hot! Also, dont heat the chip too long!   
      
   As I said above.  Bv)=   
      
    AP> DOWNSIDES:   
      
   This, of course, if for an A-500. It seems to me that I was told the A-4000   
   has soldered in CIAs - and it may well be touchier on its specs. I did a   
   newbie trick of plugging a printer into the parallel port whilst the Miggy was   
   "live". And then it was dead. FEH. Stupid bastard.   
      
   Anyway - thanks for the info. I have several C=64s laying about. Most work   
   .... but, how many 64s does a sane person need?   
      
   ... "All constants are variables." - Murphy's Law of Mathematics   
      
   --- BBBS/Li6 v4.10 Dada-2   
    * Origin: Prism bbs (1:261/38)