Ok, I have a valid (?) boot floppy disk for a 3c509B network card.
When inserted on floppy, and after the usual boot message and countdown, I
got :
starting in 0
3c509: eeprom failed to come ready.
EtherInit failed
open netbsd: Device not configured
boot: Device not configured
Boot failed

Did I need a eeprom on the card to boot ? The test is to avoid this case, to
test the image BEFORE putting it on eeprom !
Maybe I miss something ?