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lemire.me
| | www.bitsnbites.eu
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| | incoherency.co.uk
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| | [AI summary] The author explores their journey into CPU design, discussing FPGA projects, DIY CPUs like Ben Eater's breadboard CPU and Magic-1, and reflections on learning Verilog and the Nand2Tetris course to build a simple CPU capable of running an OS.
| | trendless.tech
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| | jborza.com
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| CHIP-8 is one of the most popular target architectures for aspiring emulator writers. I'm planning to implement it in hardware, so I thought that writing a software emulator/interpreter would be enlightening. I was also looking for some practice before implementing CHIP-8 in hardware in Verilog :) CHIP-8 Virtual machine description: 64x32 pixel monochrome display 4K of 8-bit RAM 16 8-bit "variable" registers V0-VF I 16-bit address register Stack of 16-bit addresses for call/return 16-bit PC - program counter 8-bit delay timer (decremented at 60 Hz) until it reaches 0 8-bit sound timer (decremented at 60 Hz), beeps when it reaches 0 16- key keypad that sends scan codes 0x1-0xF Instruction set See https://en.