access.lst

P18F4610的汇编有关验证ACCESS区作用的代码．ACCESS区起什么作用这个迷惑了我一段时间最后还是通过汇编解开了．MCC18编译器．

00008e   c080     MOVFF     0x80,0xff6           TBLPTR = prom;                                                             C:\mcc18\src\traditional\startup\c018i.c
000090   fff6                                                                                                               
000092   c081     MOVFF     0x81,0xff7                                                                                      
000094   fff7                                                                                                               
000096   c082     MOVFF     0x82,0xff8                                                                                      
000098   fff8                                                                                                               
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                                 /* do the copy loop */                                                     C:\mcc18\src\traditional\startup\c018i.c
                                                 _asm                                                                       C:\mcc18\src\traditional\startup\c018i.c
                                                   // determine if we have any more bytes to copy                           C:\mcc18\src\traditional\startup\c018i.c
00009a   0100     MOVLB     0x0            	movlb curr_byte                                                                 C:\mcc18\src\traditional\startup\c018i.c
00009c   5383     MOVF      0x83,0x1,0x1   	movf curr_byte, 1, 1                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           copy_loop:                                                                       C:\mcc18\src\traditional\startup\c018i.c
00009e   e102     BNZ       0xa4           	bnz 2 // copy_one_byte                                                          C:\mcc18\src\traditional\startup\c018i.c
0000a0   5384     MOVF      0x84,0x1,0x1   	movf curr_byte + 1, 1, 1                                                        C:\mcc18\src\traditional\startup\c018i.c
0000a2   e007     BZ        0xb2           	bz 7 // done_copying                                                            C:\mcc18\src\traditional\startup\c018i.c
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           copy_one_byte:                                                                   C:\mcc18\src\traditional\startup\c018i.c
0000a4   0009     TBLRDPOSTINC             	tblrdpostinc                                                                    C:\mcc18\src\traditional\startup\c018i.c
0000a6   50f5     MOVF      0xf5,0x0,0x0   	movf TABLAT, 0, 0                                                               C:\mcc18\src\traditional\startup\c018i.c
0000a8   6eee     MOVWF     0xee,0x0       	movwf POSTINC0, 0                                                               C:\mcc18\src\traditional\startup\c018i.c
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           	// decrement byte counter                                                       C:\mcc18\src\traditional\startup\c018i.c
0000aa   0783     DECF      0x83,0x1,0x1   	decf curr_byte, 1, 1                                                            C:\mcc18\src\traditional\startup\c018i.c
0000ac   e2f8     BC        0x9e           	bc -8 // copy_loop                                                              C:\mcc18\src\traditional\startup\c018i.c
0000ae   0784     DECF      0x84,0x1,0x1           decf curr_byte + 1, 1, 1                                                 C:\mcc18\src\traditional\startup\c018i.c
0000b0   d7f9     BRA       0xa4           	bra -7 // copy_one_byte                                                         C:\mcc18\src\traditional\startup\c018i.c
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           done_copying:                                                                    C:\mcc18\src\traditional\startup\c018i.c
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                                 _endasm                                                                    C:\mcc18\src\traditional\startup\c018i.c
                                                 /* restore the table pointer for the next entry */                         C:\mcc18\src\traditional\startup\c018i.c
0000b2   c087     MOVFF     0x87,0xff6           TBLPTR = data_ptr;                                                         C:\mcc18\src\traditional\startup\c018i.c
0000b4   fff6                                                                                                               
0000b6   c088     MOVFF     0x88,0xff7                                                                                      
0000b8   fff7                                                                                                               
0000ba   c089     MOVFF     0x89,0xff8                                                                                      
0000bc   fff8                                                                                                               
                                                 /* next entry... */                                                        C:\mcc18\src\traditional\startup\c018i.c
0000be   0100     MOVLB     0x0                  curr_entry--;                                                              C:\mcc18\src\traditional\startup\c018i.c
0000c0   0785     DECF      0x85,0x1,0x1                                                                                    
0000c2   0e00     MOVLW     0x0                                                                                             
0000c4   5b86     SUBWFB    0x86,0x1,0x1                                                                                    
0000c6   d7bf     BRA       0x46                 goto test;                                                                 C:\mcc18\src\traditional\startup\c018i.c
                                           done:                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           ;                                                                                C:\mcc18\src\traditional\startup\c018i.c
0000c8   0012     RETURN    0x0            }                                                                                C:\mcc18\src\traditional\startup\c018i.c
                                           #include <p18f4610.h>                                                            F:\text\access\access.c
                                           #pragma udata b=0x1AA                                                            F:\text\access\access.c
                                           unsigned char b;                                                                 F:\text\access\access.c
                                           #pragma udata access a                                                           F:\text\access\access.c
                                           unsigned char a;                                                                 F:\text\access\access.c
                                           void main (void)                                                                 F:\text\access\access.c
                                           {                                                                                F:\text\access\access.c
                                             _asm                                                                           F:\text\access\access.c
0000e2   0e11     MOVLW     0x11             MOVLW 0x11                                                                     F:\text\access\access.c
0000e4   6f02     MOVWF     0x2,0x1          MOVWF 0X02,1                                                                   F:\text\access\access.c
0000e6   0101     MOVLB     0x1              MOVLB 0X01                                                                     F:\text\access\access.c
0000e8   0e22     MOVLW     0x22             MOVLW 0X22                                                                     F:\text\access\access.c
0000ea   6faa     MOVWF     0xaa,0x1         MOVWF 0Xaa,1                                                                   F:\text\access\access.c
0000ec   0000     NOP                        nop                                                                            F:\text\access\access.c
                                             _endasm                                                                        F:\text\access\access.c
                                                                                                                            F:\text\access\access.c
0000ee   0012     RETURN    0x0            }                                                                                F:\text\access\access.c
                                           ;	RCS Header $Id: cmath18.asm,v 1.1 2003/12/09 22:53:19 GrosbaJ Exp $            C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                                                                                                            C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                           ;       CMATH18 DATA DEFINITION FILE                                             C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                                                                                                            C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                           ;******************************************************************************* C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                           ;   VARIABLE ALLOCATION - Core math library routines                             C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                           ;******************************************************************************* C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                                                                                                            C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                           MATH_DATA      UDATA_ACS                                                         C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                                                                                                            C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                           SIGN		RES 1       ; save location for sign in MSB                                C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                           FPFLAGS		RES 1       ; floating point library exception flags                    C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                                                                                                            C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                                   GLOBAL  SIGN, FPFLAGS                                                    C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                           	                                                                                C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                                   END                                                                      C:\MCC18\SRC\TRADIT~1\MATH\cmath18.asm
                                                   LIST P=18F4610                                                           C:\MCC18\SRC\TRADIT~1\PROC\p18f4610.asm
                                                   LIST                                                                     C:\MCC18\SRC\TRADIT~1\PROC\p18f4610.asm
                                                   END                                                                      C:\MCC18\SRC\TRADIT~1\PROC\p18f4610.asm