The WDC code isn't in the EEPROM - it's burned into a PROM inside the W65c134 CPU on the SXB board.
So you can change the EEPROM all you like and the WDC monitor is still there, lurking, hating your every move.

Different board. Mine is the 6502SXB which has MPU, ACIA, PIA & two VIA chips. It's ...

Complaints about the software in the SXB boards seem common. The SXB units have the right idea, but I’m not sure how they ended up with lame firmware. Oh, well! That’s why the good Lord invented assemblers, EPROM burners, etc. :D
I didn't want to say anything too disparaging as you never know who ...

Hello All,

I'm 54, semi retired IT nerd who started out with my first computer, the C-64 way back in 1983.
Got interested in electronics as my older brother was in university studying electrical engineering and he had the garage full of all the cool toys that were a complete mystery to me at the ...