oh no the Mac Plus might require a load on the +12v line in order for the power supply to stabilize, which is problematic for running it without a computer attached
if the Mac's analog board wants to have the computer connected, that can be arranged..
@ranjit I’m recreating my BBB PRU based Mac video interface in the fpga Pixel Wrangler so that the tiny B&W crt can be used as an hdmi monitor. The Apple mainboard is running just to provide enough load on the power supply.
@th what's going on here? is your board driving the analog video stuff directly or is it using the mac's frame buffer somehow?