New blog post about updating a ThinkPad P14s BIOS and boot logo on FreeBSD.HEADmaster

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+# Updating the BIOS and boot logo on a ThinkPad P14s running FreeBSD  
+
+**WARNING - I accept no responsibility for any bricked devices, so continue at your own risk !**  
+ 
+You will need a USB memory stick and either `doas` or `sudo` and `geteltorito` installed before continuing.
+ 
+- First download your ThinkPad's BIOS update by visiting Lenovo's support website [**here**](https://pcsupport.lenovo.com/gb/en).  
+  
+- Next either enter your devices serial number or search through the options to find your ThinkPad model.  
+  
+- Then choose drivers and updates and click on Manual Update, Select Drivers.  
+
+- Finally select BIOS/UEFI and download the BIOS Update (Bootable CD). This will download a iso image to your Laptop.  
+
+- Extract the image from the iso by executing `geteltorito -o bios.img downloaded-bios-image-file-name.iso`
+
+- Write it to the stick with `doas dd if=bios.img of=/dev/da0s1 bs=1M`  
+
+**Be careful to write to the correct device, of course.**  
+
+If you're happy to just update the BIOS and not customise your boot logo then just reboot and boot off the USB stick.  
+Being carefull to follow the on screen instructions to avoid any damage to your ThinkPad.  
+ 
+**However if you also wish to change the boot logo then continue from here.**  
+
+The logo I use is the ThinkPad logo but I have found other ready made ones [**here**](https://github.com/deadbaed/blog/tree/master/content/2019-02-24-thinkpad-custom-boot-logo/boot-logo)  
+
+You are free of course to create your own boot logos but Lenovo recommends that you follow the following requirements:
+
+Supported formats are Bitmap, JPEG, and GIF, and the maximum file size is 60KB. Also the image must be <= 40% of the screen resolution.
+
+- mount the stick `doas mount -t msdos /dev/da0s1 /mnt/usb` -  Note: You will have to create `/mnt/usb` or whatever you prefer.  
+
+- Copy the downloaded boot logo to `FLASH/LOGO.JPG`, `FLASH/LOGO.GIF`, or presumably `FLASH/LOGO.BMP`.  
+
+- Issue `doas umount /dev/da0s1` and reboot your ThinkPad, remembering to boot off the USB stick.  
+Being carefull to follow the on screen instructions to avoid any damage to your ThinkPad.  
+
+**You may need to turn off Secure Boot to boot from the stick.**
+
+If you already have the latest BIOS version installed, you'll need to turn off the BIOS setting for preventing downgrades, As this can also prevent re-flashing the same version.  
+  
+It can be found in the BIOS under Security->UEFI bios update options -> Secure Rollback Prevention  
+  
+The default Lenovo logo can be restored by simply reflashing the BIOS update and when when asked if you want to use your own custom logo, Just say no.