Download fblogo, you can get a version for Slackware from:
Create or find the image no more than 224 colors, and 80x80px size so that you do not disturb the messages shown by your distro at boot time.
You need not be too restrictive when creating the image: we will use another tool to convert it so that it meets the color-related prerequisites.
Save the image as png, and run the following:
pngtopnm logo.png | ppmquant -fs223| pnmtoplainpnm > logo_linux_clut224.ppm
cp logo_linux_clut224.ppm /usr/src/linux/drivers/video/logo/
Now configure your kernel, making sure that the following options are enabled (they can be found under the Device Drivers, Graphics Support subsection):
Support for frame buffer devices
VESA VGA graphics support
Video mode selection support
Framebuffer Console support
Select compiled-in fonts
VGA 8x16 font
Standard 224-color Linux logo
Taken from: http://articleworld.org/index.php/Ho...guin_boot_logo