On 10/23/2011 11:11 PM, Mike Naberezny wrote: > 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. > Great find! Keep us posted if you can repair it and make it work with the 1541 ROMs. You might want to compare the board to a 1540/41 long board though since that one is all TTL like yours and doesn't have the 40pin Gate Array of the 1541 short board. Here are pictures of one: http://sid.fi/~tnt/c64/pic/VC1541_PCB_top.jpg http://ist.uwaterloo.ca/~schepers/CABLEPIX/1541/1541LB.JPG Gerrit Message was sent through the cbm-hackers mailing listReceived on 2011-10-24 19:00:04
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