I decided to step back from the full 6502 and implement a toy 8 bit processor.

I ended up implementing Soo-Ik Chae's architecture from https://ocw.snu.ac.kr/sites/default/files/NOTE/6639.pdf. Zachary Yedidia's SystemVerilog Guide was a useful guide to idiomatic SystemVerilog, and David Money Harris's MIPS implementation from CMOS VLSI Design 4th Ed. was very readable.