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modern TTL/Logic-gate/74xx
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rstofer:
I have that Basys  board as well.  It's pretty nice but the 35T device is a lot smaller than the 100T device.  I hope you selected the 100T variant rather than the much smaller (in terms of BlockRAM) 50T device.  Bigger is better - always!

ETA:  You will find the DDR component under Additional Resources on the original Nexys 4 DDR board page:

https://reference.digilentinc.com/reference/programmable-logic/nexys-4-ddr/start

I think this is going to take a bit of studying.  I have never used it.


 
ker2x:

--- Quote from: rstofer on October 09, 2019, 04:46:02 pm ---I hope you selected the 100T variant rather than the much smaller (in terms of BlockRAM) 50T device.  Bigger is better - always!

--- End quote ---

Of course  ^-^
rstofer:

--- Quote from: ker2x on October 09, 2019, 04:23:33 pm ---Perfect, it was in my wish-list already so i just ordered it.
I'll receive it in 2 or 3 days.

--- End quote ---

Well, I guess that settles the chip vs FPGA question!  I think you'll like the board.  You need to install Vivado and then follow the Yellow Brick Road at Digilent to install their board files.  This is an important step.  You don't want to design to the chip level, you want to design for the board so, when you create a project, you will select the Boards tab and find your board in the list.  Installing the files is easy to do but it is a really big deal!

So, while you wait, you might as well install Vivado and the Digilent files.  I have forgotten whether you need to install the Digilent Adept software but you might as well.  Once everything is tied together, board programming is seamless via Digilent's USB->JTAG device.  Seamless was always important to me, I really never liked using JTAG dongles even if they did work from time to time.

The USB gadget also appears as a UART - this is really handy since almost every CPU project will want to talk to a PC.

As you no doubt found out, there are a lot of resources for this board (and its predecessor, the Nexys 4 DDR) at Digilent.  It might be worth looking around for tutorial projects.

When I program a project into the board, I program only the FPGA, not the platform flash.  That way, on power up, I get the crawling snake, not the remnants of some program I was previously working on.
ker2x:
I realize there might be a problem : https://www.amazon.fr/gp/product/B0714MKJ4H/
1) the digilent product description on amazon.fr are garbage (on all their product)
2) the picture show a nexys A7
3) the title say Nexys 4 DDR, which is discontinued

Both board are nearly identical according to digilent. I can't even find the difference.
I'm wondering what product i'll get  :o

The description also say Nexys 4 DDR.
Well, if they are the same, i don't mind. If there is a difference i don't like i can send it back saying the picture was wrong and the description unreadable.

The wiki say : "The only difference between the Nexys A7 and Nexys 4 DDR is the addition of the Nexys A7-50T variant of the Nexys A7, which has a smaller gate array. The Nexys A7-100T variant is functionally identical to the Nexys 4 DDR."
ker2x:

--- Quote from: rstofer on October 09, 2019, 05:24:00 pm ---
--- Quote from: ker2x on October 09, 2019, 04:23:33 pm ---Perfect, it was in my wish-list already so i just ordered it.
I'll receive it in 2 or 3 days.

--- End quote ---

Well, I guess that settles the chip vs FPGA question!  I think you'll like the board.  You need to install Vivado and then follow the Yellow Brick Road at Digilent to install their board files.  This is an important step.  You don't want to design to the chip level, you want to design for the board so, when you create a project, you will select the Boards tab and find your board in the list.  Installing the files is easy to do but it is a really big deal!

So, while you wait, you might as well install Vivado and the Digilent files.  I have forgotten whether you need to install the Digilent Adept software but you might as well.  Once everything is tied together, board programming is seamless via Digilent's USB->JTAG device.  Seamless was always important to me, I really never liked using JTAG dongles even if they did work from time to time.

The USB gadget also appears as a UART - this is really handy since almost every CPU project will want to talk to a PC.

As you no doubt found out, there are a lot of resources for this board (and its predecessor, the Nexys 4 DDR) at Digilent.  It might be worth looking around for tutorial projects.

When I program a project into the board, I program only the FPGA, not the platform flash.  That way, on power up, I get the crawling snake, not the remnants of some program I was previously working on.

--- End quote ---

I started installing vivado even before ordering the card  ;D

It pretty much settle the chip/fpga but not so much.
I still have the option to design the cpu on chip but : i probably won't, and i'll implement everything in fpga before doing an eventual chip version. There is a VGA port after all, i MUST use it  ;D
This board probably doesn't have enough I/O for interfacing with a homebrew CPU anyway. I could buy, later, a cheap nano board with no accessories, only the fpga and tons of I/O if i really want it. Something like this : https://store.digilentinc.com/cmod-a7-breadboardable-artix-7-fpga-module/
But i learned my lesson. i have a board like this (with a Spartan-6) and it's NOT a good way to learn  :horse:
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