A clock-accurate FPGA clone of the NMOs processor 6502, created on the basis of reverse engineering.
Video on YouTube https://www.youtube.com/watch?v=dFyq43pBDUY
Klaus Dohrmann successfully passes the functional test. The test was conducted at a frequency of 2.5 MHz and took about 40 seconds.
Results of the core operation as part of the FPGA 2A03 NES APU. Blargg CPU tests.
NESTEST (Kevin Horton) test results
NES 6502 Timing Test
Operation of the core as part of the APU 2a03 on the FPGA. Sound check.
Video on YouTube https://www.youtube.com/watch?v=xtj7G8qB2oU