A1000 or A500 Back plane

[FrenchShark]

Hello,

I plan to fit a stratix II dev board into an A1200.
This week, I am going to replace the 2MB SRAM chip by a 8MB one so I can get 8MB of 32-bit chip RAM running at 64 times the OCS speed :-D
Then, I have to design a daughter board with all the Amiga specific I/O (RGB, composite, audio, joysticks, keyboard, floppy, parallel and IDE !)

I also have a prototype of a RISC CPU that I might use as a video/audio co-processor. For the moment, it takes 1,600 LEs of my FPGA (out of 60,000...).

From my point of view, the easiest way to get a high quality HW for an expanded minimig is to buy a dev board.
The DE2 has the best feature/price ratio (especially if you can get the student discount). The new DE2 with the Cyclone II EP2C70 is incredible (dual DDR-RAM, dual video input).

Regards,

Frederic

[FrenchShark]

Does the mylar resist to soldering temperature ?
I know some pcb prototyping companies have half thickness PCBs but the price difference might offset the price of a 4-layer PCB.

If you have a very thin insulator, you should adapt your traces accordingly ( => very thin trace) to have the right impedance.

By the way I am not smoking anything and I hope my Nios board won't smoke either :-P