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Amiga computer related discussion => Amiga Marketplace => Topic started by: mrmkl on January 03, 2010, 09:34:07 PM

Title: FS: Blank PCBs for a (maybe) 8 MB RAM (to 68000 DIL socket)
Post by: mrmkl on January 03, 2010, 09:34:07 PM

FastRAM board with a place for 4M x 16 bit DRAM chip + XC9572 tqfp100 cpld.
DRAM IC is 5 volt KM416C4104C, which could be found on some EDO SIMMs.
It is not yet verified that these will be working, but I think they will.

http://iki.fi/mkl/ram68k/

Two (2) printed circuit boards for 15 euros. Shipping (letter post) free.

Title: Re: FS: Blank PCBs for a (maybe) 8 MB RAM (to 68000 DIL socket)
Post by: amigadave on January 03, 2010, 10:22:22 PM

Quote from: mrmkl;536109

FastRAM board with a place for 4M x 16 bit DRAM chip + XC9572 tqfp100 cpld.
DRAM IC is 5 volt KM416C4104C, which could be found on some EDO SIMMs.
It is not yet verified that these will be working, but I think they will.

iki.fi/mkl/ram68k/ (http://iki.fi/mkl/ram68k/)

Two (2) printed circuit boards for 15 euros. Shipping (letter post) free.

I might be interested in a couple of these when they are done and tested as working.  Looks like a nice idea.

Title: Re: FS: Blank PCBs for a (maybe) 8 MB RAM (to 68000 DIL socket)
Post by: Matt_H on January 03, 2010, 10:40:03 PM

Nice compact design! If you can do the same for the A600's PLCC 68000 (fully assembled), I'd be very interested.

Title: Re: FS: Blank PCBs for a (maybe) 8 MB RAM (to 68000 DIL socket)
Post by: waltermixxx on January 03, 2010, 10:42:24 PM

I'm waiting for the IDE version of this... :) either confirmed working pcboard, or,
fully built one... :) cheers and thanks for your hard work... you make the coolest things... :)

Title: Re: FS: Blank PCBs for a (maybe) 8 MB RAM (to 68000 DIL socket)
Post by: jkonstan on January 04, 2010, 08:46:36 PM

A combination of the 8MByte of DRAM & an IDE interface on the same PCB would be better as an upgrade to a stock A500 or A1000. The 64Mbit +5V EDO DRAM is going to be hard to find. It may have been easier to get parts if you had used a 64Mbit SDRAM (ISSI part# IS42S16400E) with the Xilinx CPLD. Xilinx app note XAPP394 covers using a CPLD as a SDRAM controller.

Title: Re: FS: Blank PCBs for a (maybe) 8 MB RAM (to 68000 DIL socket)
Post by: skurk on January 04, 2010, 09:35:07 PM

Quote from: mrmkl;536109

FastRAM board with a place for 4M x 16 bit DRAM chip + XC9572 tqfp100 cpld.
DRAM IC is 5 volt KM416C4104C, which could be found on some EDO SIMMs.
It is not yet verified that these will be working, but I think they will.

I think it's fair to inform that they will not work after soldering up the components; the CPLD needs to be personalized with the code, which (as far as I can tell) is not available just yet.

"Current state: not yet finished. Cpld code needs to be prepared.."