I saw some good articles. Because the attachment is too large, I had to directly transfer it and leave an address.
Http://www.soeol.com/downs/news/2008/7-12/2008712102653.html
How picmcu works
Http://www.soeol.com/downs/news/2008/7-7/200877175043.html
PIC microcontroller principle and Program Design
Http://www.soeol.com/downs/news/2008/7-7/200877173702.html
PIC microcontroller subroutine set [/url]
Http://www.soeol.com/downs/news/2008/7-7/200877173804.html
PIC Single-Chip Microcomputer C language programming guide
Http://www.soeol.com/downs/news/2008/7-7/200877175111.html
List of features of commonly used PIC products. [/url]
Http://www.soeol.com/downs/news/2008/7-7/200877175150.html
The Instruction Set of the Apsara stack single-chip microcomputer (hcs08 series chinese) [/url]
Http://www.soeol.com/downs/news/2008/7-12/2008712101036.html
Application Design of PIC16C5X series single-chip microcomputer [/url]
Http://www.soeol.com/downs/news/2008/7-12/2008712102741.html
PIC 12-bit MCU Instruction Set [/url]
Http://www.soeol.com/downs/news/2008/7-12/2008712102759.html
] PIC 14-bit MCU Instruction Set [/url]
Http://www.soeol.com/downs/news/2008/7-12/2008712102823.html
PIC 16-bit MCU Instruction Set [/url]
Http://www.soeol.com/downs/news/2008/7-12/2008712102840.html
Typical application assembly of PIC Series Single Chip Microcomputer [/url]
Http://www.soeol.com/downs/news/2008/7-12/2008712102722.html
PIC Programming Application Notes [/url]
Http://www.soeol.com/downs/news/2008/7-12/2008712102607.html
Pic c Programming basics [/url]
Http://www.soeol.com/downs/news/2008/7-7/200877173739.html
PICC database function [/url]
Http://www.soeol.com/downs/news/2008/7-12/2008712100925.html
Dspic C30 C compiler user guide (Chinese) [/url]
= Http://www.soeol.com/downs/news/2008/7-12/2008712100657.html
Dspic30f_to_dspic33f conversion Guide [/url]
Http://www.soeol.com/downs/news/2008/7-12/2008712102547.html
PIC 16f87x Chinese Data Manual [/url]