3 ms·
In my experience [building my own Commodore PET on an FPGA](https://gergo.erdi.hu/blog/2015-03-02-initial_version_of_my_commodore_pet/ https://gergo.erdi.hu/blo
by gergoerdi 10y ago
In my experience [building my own Commodore PET on an FPGA](https://gergo.erdi.hu/blog/2015-03-02-initial_version_of_my_commodore_pet/ https://gergo.erdi.hu/blog/2015-03-02-initial_version_of_my_...), the PET would be a very promising candidate for using this as a plug-in replacement, since the (text-only) video subsystem can be fully isolated from the CPU with just dual-port video RAM between the two sides (and a 60Hz spike from the video side to the CPU IRQ leg).