Haha, nice to see your project is still running BDD!
I was surprised to find out today 1 of my older video boards still work after a long move. It's part of the reason I posted. I moved to OH last November and am finally getting everything organized. Today I came across a few of my own creations and ...

Cheers, Happy New Year friends!
It's been a long time

After finalizing the SRAM adapter size to about 44mm x 35mm ~(1.75" x 1.5") and counting the signal/control pins used @43 pins each, I determined about 172 pins will be needed. I say 'about' because I'm giving myself some margin for error.

Forgive me, I know I'm not being 100% with an explanation ...

I'm sorry I posted a 4mx8 part from an uncompleted project. I'm using a GS8320xxx 2mx8 250MHz part. They are being sold and even better I left myself a present in the form of 4x unused 2Mx8 still wrapped and untouched in a tray.

I will make 4x adapter boards for these ICs also, probably get away ...

I don't know what is going on with the IC supply but I cannot find the Synchronous RAMs I was using for sale and the 1 I found from a manufacturer is almost 5x cost and only 3 left in inventory. This is not good news! Can someone tell me what is going on? This supply problem can't still be related ...

You are correct sir! Good eye, thank you for spotting that Neil.

Very good idea guys, I will try to utilize this idea if I can!

Here's an initial layout estimate using a spare vector board. The square in the middle is just a placeholder for the BGA, about 24mm x 24mm. This arrangement has 31x4 pins on the outside perimeter, then 29x4 pins and 27x4 pins for a ...

I already chose this type, 48x Aries 40-pin SIP (Single Inline Package) and a 4" x 6.5" vector board. These SIPs can be trimmed as needed. From this I should be able to determine the final adapter board size. Of course I am aiming for as small as possible, <3" x 3". The vector board may or may not ...

After some research I've done, these headers/pins with indeed be spaced at .1" (2.54mm) not the .050" as I was dreaming about. The pins are not thick enough at .050" spacing, plus plugging/re-plugging one of these bastards in would be a nightmare. I always lean towards machine tool sockets due to ...

Dr, Jeff, you said it! The logical conclusion is GND pins around all NCLK and GCLK pins, nut not necessary for regular I/O. When the time comes, I'll see if I can afford the real estate for all FPGA CLKs, the design isn't limited to ~2" x 2" (51mm x 51mm). I'm picturing maybe 3-4 rows of pins on the ...

To answer my own question; there is no .050" wire wrap. And using .1" pitch connectors is out of the question due to the number of pins. I think I will be limited right from the beginning on the type of (.050") 1.27mm connector I can use to send signals off the FPGA board. Already spent hours ...

Hi Garth, I will read that primer before I dive in. Might be another month, finances are a little tight now and big trip coming March 1. Honeymoon in Vegas, after 21 years. :lol:

I wasn't planning on putting grounds in the headers, this will be short wire wrap pins coming off the 2" x 2" board so ...

Interested in your progress.

I've accidentally acquired large number of 144-pin BGA and tried to work with it on and off. The latest attempt had vias in some BGA pads. I built a 2-layer prototype, made the board thin, filled the vias with solder and tried to solder it with hot air, but wasn't very ...

Dr. Jeff! Hello! Thanks for your kind words, I feel very confident in mounting the 484 pin BGA for this project! You can consider this like a CPU module where all the signals come and go from, including master clocks for offboard IC's like the SyncRAM's and possibly videoDAC.
My intent is to have ...

Hi Ed! Thank you, I hope you are well!

Yesterday I was able to place individual polygons over the vias on the soldermask level and after receiving a response from ExpressPCB, this is indeed the way to do it, although it seems abit clunky to me. It seems more natural to just have an option for vias ...