Linux-0.11 kernel keyborad. s program

This assembler is a hard-to-understand program in the kernel Assembly I have seen. I am lucky to find an article on the Internet to analyze this program. The two examples can be used to deepen the understanding of the program.

 

Note: The file suffix is. s instead. s, using this suffix can make as use of the GNU Compiler's Preprocessing Program CPP (defined in each makefile in the linux-0.11), so that in the assembler can use a lot of pseudo commands in C language, for example, # include, # If.

 

The main function of this program is to call the corresponding scanning code processing subroutine that has been compiled into a jump table (key_table) based on the key scan code that causes keyboard interruption, put the payment corresponding to the scan code into the character Queue (read_q.