*255 rombanks: no need to add a rombank.
*M4 Board emulation: no need to add the card of the same name.
*[[Hackit|Hacker v7.0 ]] in a dedicated rombank: no need to add the card of the same name.
*support for a USB mouse: no need to add a Multiplay or an Albireo.
*an RTC clock: no need to add a Nova extension or equivalent.