Introduction - If you have any usage issues, please Google them yourself
Master the environment, the use of 1) bytes KeilC split, merge: debug e421.asm program to observe the relevant register and the contents of the cell. 2) data block fill: debug fill.asm program to observe the relevant register and the contents of the cell. (2) to write two 16-digit addition. Two 16-bit unsigned number stored in the data area from 20H and 30H, the low eight pre-existing high eight in the post, and stored in R3, (high eight) and R4 (low eight ), the carry bit stored in R2.