Conference hydra::amiga_v1

I know the problem you are having. I know which chip or chips that are
guilty, but I will have to look up the chip number. It will be very difficult 
to get this chip since it is a custom Commodore chip, so I would suggest
going to an authorized dealer to get it repaired. The place where I took it to
get it repaired only charged me $35.00 to fix it. The chip itself is pretty 
expensive. If you want to open up your Amiga you will find the chip 
immediately behind the disk drive and the chip is very accessible.
There are actually two of these chips sitting side by side, and these
identical chips  control the clock. I had this problem due to a faulty
cable. It also blew my disk driver. Since you blew a UART, I would check
your cables, before more damage occurs.
I will try to remember to post those chip numbers tomorrow.
Good Luck!
Alan Sullivan

>    2]  Does anybody know where I can get schematics of my machine.
 
    Some info from CBM:
    
>AMIGA 1000 Schematics and Expansion specs	$20.00 (US Funds)
>-----------------------------------------
> 
>This includes the full AMIGA schematics, timing diagrams, and PAL equations.
>Also included is documentation for the auto-configuration process.
>     [...]
>To order these items, make your check payable to "Commodore Business Machines",
>and send it to:
> 
>Software Tech Support
>ATTN: Lauren Brown
>Commodore Business Machines
>1200 Wilson Drive
>West Chester, PA 19380
> 
>Please specify the name(s) of the item(s) you are ordering on both the check
>and letter of request. Be sure to include your name and address.
> 
>Canadian orders add $2.50 Shipping & Handling
>European orders add $5.00 Shipping & Handling (Air Mail)
>US orders need not include Shipping & Handling
> 
>Note: you do *NOT* have to be an official AMIGA developer to order these items.
>-- 
>  <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Dan Schein >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 
>   Working for, but in no way officially representing
>   Commodore Business Machines  
>   1200 Wilson Drive               uucp: {ihnp4|seismo|caip}!cbmvax!schein
>   West Chester, PA 19380          arpa: [email protected]
>   (215) 431-9384                  or    [email protected]@{seismo|harvard}
> 
>   Quote: Those who worked the hardest         Gary Ward - Oklahoma State
> 	   are the last to surrender                       baseball coach
                                  
    The clock thing sounds like one of the 8520s to me, although if
    one of those went bad the mouse would die too, wouldn't it?

While I haven't been there, I did learn one place where service is actually done
in Eastern Mass.  

	Compair (in Andover)
	617/475-7285

I believe this is where the Memory Location sends things.  You might call them
for an estimate.  (My impression is that this may be the only place around here
which performs service.)

	Paul

    Howdy,
    
    WHen my computer broke last time it was because of the CIA chip
    that does the disk stuff and also does the clock tick stuff.  Anyhow
    just recently my machine died again.
    
    I was porting a new version of micro-emacs to the Amiga.  (This
    emacs will be much closer to the real thing + it has a much better
    mouse event handler... It will allow scrolling by pressing on a
    line and dragging it)  Anyhow, after I made all of the Amiga specific
    changes, I ran it.  The Screen and Window came up for about a half
    of a second then the screen went blank.  I rebooted and tried it
    again (useless to try something that doesn't work).  It happened
    again, so I rebooted and loaded the Manx debugger DB.  I set the
    breakpoint at the wrong place, and the screen went blank again after
    I started the program.  BUT, This time, I could not reboot the machine.
    The keyboard had no affect.  I turned the machine off, then my
    harddrive, then my modem.  I unplugged everything from my computer
    except the monitor and turned it back on.  It never got to the
    Kickstart prompt.  It stayed at the Dark Grey screen.  I brought
    it into Memory Location to be repaired.  After four days I called
    their repair center and talked to a guy named Dave.  He said the
    Disk drive was bad.  He said he has been having a lot of problems
    with NEC drives.
    
    QUESTION:  Do you think that my software could have had something
    to do with ruining a drive?  Do you think the drive may have been
    flakey before and has been the culprit for killing the CIA chip?
    Do you think the guy at Memory Locations repair center is trying
    to stick me for 150 bucks?
    
    Thanks for your input				--MIKE

    I don't know if it's possible to break any hardware from software,
    but I do know of a friend who's Amiga exhibited the same symptoms.
     
    He sent it out to Com-Pair in Acton, and the verdict was a dead
    NEC internal drive.
                                                                       
    My Amiga is a month shy of 2 years old, and I have thankfully had no
    problem with my NEC drives, other than needing earplugs.  If you do go
    for the drive replacement, make sure that they use Panasonic JU-363
    drives.  I've heard of so many NEC failures that I think it's the most
    common Amiga breakage mode.  The Panasonics are shipped in all new
    Amigas, and they are of a lower profile than the garbage NEC models.
    This would be important if you ever wanted to install KickStart
    Eliminator ROMS.  The KickStart RAM daughterboard is periously close to
    the NEC drive, but has plenty of clearance to the Panasonics.
          
    
    

    re: .4
    
    maybe the drive was damaged somehow when the CIA chip died, just
    took some time to get ill enough to fail the hardware self-test.
    
    Might be interesting to find out exactly what "died" in the NEC
    drive.  $150 sounds like a drive swap, maybe they don't repair
    drives.  Might be cheaper to swap vs. the labor cost to repair.
    Or maybe their diagnostic gear just isolates the problem down
    to "bad" drive.
    
    If you want a new hobby, i had a friend who repaired his 8-bit
    atari disk drive by ordering parts from the drive manufacturer.
    The parts were cheaper than replacing the drive, the catch is
    you have to have some idea what is "bad".
    
    -dave
    

    Howdy,
    
    Thanks for your replies.  I decided shortly after I posted the note
    to pay for the new Panasonic drive.  I need my Amiga too much to
    let some fool hack with it for another week.
    
    After I got it home, I wanted to run my program again and see if
    it crashes amigas.  I had my hands incredibly close to the Ctrl
    A-A.  Anyhow, again, the screen went dark, I hit the keys, and 
    the machine stayed at that dark Gray screen again.  I was furious.
    As I was jumping up and down and pulling my hair out, the Kickstart
    prompt came up.  Somehow, my program messes the hardware bad enough
    to make the computer think it was just turned on.  I studied the
    program for three hours and cannot find out why this is happening.
    I even set a stack of 100000 just to make sure it wasn't eating
    the stack.  I guess I won't be converting this version of emacs.
    
    Oh well,
    
    Mike...
    
    p.s.  this version of emacs is a descendant of the one that works
    on VMS.  Does someone else want to try it? Beware: it eats machines.

    HOLD ON!!!!!
    
    In one last attempt to find the bug, I FOUND IT.  Due to a screwed
    pointer I was trying to
    
    move.w	d1,0x0000
    
    This statement was causing my computer screen to blank out and the
    hardware to do something unexpected.   It either breaks disk drives
    or causes the computer to reset (fully, as if just powered up).
    
    Seems fishy to me.
    
    Mike.