The PROM wants a password when I abort booting (top)
You need physical access to the machine to erase the password. Power off, power on, hold [L1]+[N], (or [STOP]+[N]) until the PROM prompt. This will reset your PROM to the factory defaults.
Alternatively (this is not for the faint of heart), power on, abort, wait for the password prompt, carefully remove the PROM chip, hit return, carefully replace the PROM, enter a new password.
google!
You need physical access to the machine to erase the password. Power off, power on, hold [L1]+[N], (or [STOP]+[N]) until the PROM prompt. This will reset your PROM to the factory defaults.
Alternatively (this is not for the faint of heart), power on, abort, wait for the password prompt, carefully remove the PROM chip, hit return, carefully replace the PROM, enter a new password.
google!
Skill is when luck becomes a habit.