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Reverse engineering XC2064, the first FPGA (2020)
A Field-Programmable Gate Array (FPGA) can implement arbitrary digital logic, anything from a microprocessor to a video generator or crypt...
A Field-Programmable Gate Array (FPGA) can implement arbitrary digital logic, anything from a microprocessor to a video generator or crypto miner. Nowadays, an FPGA is programed in a hardware description language such as Verilog or VHDL, but back then Xilinx provided their own development software, an MS-DOS application named XACT with a hefty $12,000 price tag. The vertical shift register (pink) and horizontal column select circuit (blue) are used to load the bitstream into the chip, as will be explained below.
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