WDC still sells the 65C02 (uses CMOS logic instead of NMOS): https://www.westerndesigncenter.com/wdc/chips.php https://www.westerndesigncenter.com/wdc/chips.php

WDC still sells the 65C02 (uses CMOS logic instead of NMOS): https://www.westerndesigncenter.com/wdc/chips.php https://www.westerndesigncenter.com/wdc/chips.php One fix in this variant is that all reserved/undocumented instructions are NOPs, they don't do anything unexpected. Another one is that you can stop the clock entirely and it will not lose track of what it was doing earlier.