The 6502 W65C02 6502C CPU tester NMOS / CMOS 1-8MHz is a CPU tester for 40 pin 6502/65C02 and WD65C02 and Sally.

The tester is available on Tindie.

Selectable clock frequency 1MHz, 2MHz, 4MHz and 8MHz with DIP switch. Supported CPUs are NMOS 6502, CMOS W65C02 (selectable by switch) and rare 6502C “Sally” CPU used in ATARI computers and some arcade games (6502 switch position). Identifying “Sally” is simple by pressing the HALT button, program execution stops immediately. The HALT button press doesn’t influence function when testing standard 6502 NMOS/CMOS CPUs.

External EEPROM contains test software exercising address lines A0-A15 and showing running light on port P0-P7. All LEDs A0-A15 must be active during the test (lighting or flashing) to prove address bus functionality.

The test result is shown as an animation. No detection of NMOS or CMOS or ROR instruction. See it as a NOP tester with adjustable clock speed and more instructions tested than just NOP.
As it is the only tester with adjustable clock speed it has value. For example, I see the 6502 run OK at 2 MHz, and the R65C02p2 (the 2 means 2 MHz) at 4 MHz.