Re: 1540 Prototype

On 10/23/2011 4:11 PM, Mike Naberezny wrote:
> Hi all,
>
> I have what appears to be a 1540 drive prototype.
>
> Here are some photos of the board:
> http://mikenaberezny.com/hardware/1540-prototype
>
> Externally, it is a 2031S (a single full-height 5.25" drive for 
> PET/CBM in a metal case).  Unlike a normal 2031S, this drive has a 
> completely different circuit board and has an IEC port instead of 
> IEEE-488.
>
> The top of the board has the markings:
>
>   ASSY 15400000
>   SERIAL FLOPPY CONTROLLER
>   (C)1980 COMMODORE INTL
>
> and on the bottom:
>
>   FAB 1540001
>   ARTWORK 1540000
>   REV 1
>
> The board is unlike any production drive I've seen.  It has no solder 
> mask and looks like it was soldered by hand.  It has a few trace cuts 
> and fixes.  It's clear that the board was made specifically for the 
> 2031S chassis and the full-height drive.
>
> I have not powered it up.  A previous owner has installed a 6502 where 
> a 6522 should be.  It also has the ROMs for a 2031 installed, which 
> can't work with the IEC interface.  I plan to compare the board 
> against the 1541.  If it's close, I'd like to try and bring it up with 
> the 1541 ROMs.
>
> Regards,
> Mike
Lucky hacker!

It does indeed look like you have a proto.  I'd love to hear how it came 
into your hands.

Jim



-- 
Jim Brain
brain@jbrain.com
www.jbrain.com


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