get drive geometry

resources.md

@@ -3,6 +3,7 @@
 - <http://www.unixwiz.net/techtips/x86-jumps.html>
 - <https://www.nasm.us/xdoc/2.13.01/nasmdoc.pdf>
 - <https://wiki.osdev.org/Real_Mode>
+- <https://www.eecg.utoronto.ca/~amza/www.mindsec.com/files/x86regs.html>
 
 ## Boot sequence
 - <https://wiki.osdev.org/Boot_Sequence>
@@ -18,4 +19,5 @@
 ## VGA
 - <https://en.wikipedia.org/wiki/Video_Graphics_Array>
 - <https://os.phil-opp.com/vga-text-mode/>
+- <https://mendelson.org/wpdos/videomodes.txt>