It will be likely compatible, but it will work only at 4.77 mhz. You will have to play with jumper settings/or replacing the clock signal generator on the motherboard to get it running at ~9 mhz.

Geri wrote on 2022-08-24, 21:03:

It will be likely compatible, but it will work only at 4.77 mhz. You will have to play with jumper settings/or replacing the clock signal generator on the motherboard to get it running at ~9 mhz.

Thats ok, i only need it at about 4.77 mhz anyways, from what i can tell its a more powerful cpu even at the same frequency

Be aware that your BIOS may be sensitive to CPU speed and require patching; see: Re: How to slow down NEC V20?

grenbeanbastard wrote on 2022-08-24, 21:17:

Thats ok, i only need it at about 4.77 mhz anyways, from what i can tell its a more powerful cpu even at the same frequency

Don't set your hopes too high, the V20 is only marginally faster when running real-world code. Its main advantage is that it implements all of the extra instructions that the 80286 added to 16-bit real mode, so you'll be able to (very slowly) run almost all DOS applications/drivers that don't use a 32-bit DOS extender.