I understand the principle of operation.
I organize myself a test environment.

You tested the display of a fixed image.
At the beginning I have to solve the problem of changing the memory content of the image to be displayed.
For now I have an idea for a dual-port RAM, but I hope that it will be simplified.

I have a lot of CPLD chips.
I'll try to use it instead of FPGA, but I'll need to use external RAM memory.

The FPGA chip needs an external ROM for configuration.
Two chips on the PCB are still needed.
But the Spartan6 is not compatible with TTL 5V logic.
CPLDs that I have do not require any additional buffers.

An FPGA requires an external ROM in which its configuration is remembered (loaded into the FPGA after power on).
You can use part of the FPGA structure for ROM emulation, but its contents must be also loaded from the ROM configuration.

Cheap Spartan6 has not.

I have a lot of CPLD chips.
I'll try to use it instead of FPGA, but I'll need to use external RAM memory.

And has also a good amount of static Ram.

https://www.aliexpress.com/snapshot/0.html?orderId=506118864314676&productId=32818384452

Specs(on Chinese English...):



Master FPGA:XC6SLX16-2FTG256C;

Master FPGA external clock source frequency: 50MHz;

The XC6SLX16-FTG256 chip comes with rich Block RAM resources;

The number of logic units in XC6SLX16-FTG256 chip is 14579;

M25P80, SPI, Flash chips, 1MB bytes of storage capacity;

32MB micron SDRAM model MT48LC16M16A2;

Provides 3.3V power for core board chips, using MPS's MP2359 wide range input DC/DC;

Brings out the two row 64p and 2.54mm spacing blocks, which can be used for external 24Bit TFT LCD screen, CY7C68013 USB module, high-speed ADC Acquisition module or CMOS camera module, etc.;

Draws the 3 button of the chip for testing;

Leads to the chip's 4 way LED lamp for testing;

Leads the JTAG chip debug port, the single row 6p, 2.54mm row spacing;

And about the buffer, I bought the same board to replicate exactly my friend Habi's approach:

http://store.gadgetfactory.net/io-buffer/

But the chip inside is inexpensive.

https://www.mouser.es/Texas-Instruments/Semiconductors/Switch-ICs/Digital-Bus-Switch-ICs/SN74CBT16245-Series/_/N-7590e?P=1yxz7gvZ1z0zls6


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Yes, it is better if you use your chips. I remember your 3D display...