Hi Jusnim
Welcome to the forum.
... i want to use them with the TinyCore Distribution without graphical interface . ...
So you are not starting X (Xvesa or Xorg)..
... , i just want a blank black screen after startup where u can't see what's going on. ...
A couple of ideas:
If you are running 32 bit, install vbetool.tcz onboot. Then add this to your /opt/bootsync.sh file:
vbetool dpms off
Another thing you can try is adding this to your /opt/bootsync.sh file:
vlock -a
This is supplied by busybox.suid and applies to both 32 and 64 bit systems.
I had considered suggesting changing the font color to black, but if some program decides to print in color, it will likely be visible.