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．

MP2COD 3.70.02, COFF to COD File Converter
Copyright (c) 2004 Microchip Technology Inc.
Listing File Generated: Thu Nov 17 08:22:34 2005


Address  Value    Disassembly              Source                                                                           File
-------  -------  -----------------------  -------------------------------------------------------------------------------  -----
                                           /* $Id: c018i.c,v 1.1.2.1 2004/03/09 16:47:01 sealep Exp $ */                    C:\mcc18\src\traditional\startup\c018i.c
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           /* Copyright (c)1999 Microchip Technology */                                     C:\mcc18\src\traditional\startup\c018i.c
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           /* MPLAB-C18 startup code, including initialized data */                         C:\mcc18\src\traditional\startup\c018i.c
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           /* external reference to the user's main routine */                              C:\mcc18\src\traditional\startup\c018i.c
                                           extern void main (void);                                                         C:\mcc18\src\traditional\startup\c018i.c
                                           /* prototype for the startup function */                                         C:\mcc18\src\traditional\startup\c018i.c
                                           void _entry (void);                                                              C:\mcc18\src\traditional\startup\c018i.c
                                           void _startup (void);                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           /* prototype for the initialized data setup */                                   C:\mcc18\src\traditional\startup\c018i.c
                                           void _do_cinit (void);                                                           C:\mcc18\src\traditional\startup\c018i.c
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           extern volatile near unsigned long short TBLPTR;                                 C:\mcc18\src\traditional\startup\c018i.c
                                           extern near unsigned FSR0;                                                       C:\mcc18\src\traditional\startup\c018i.c
                                           extern near char FPFLAGS;                                                        C:\mcc18\src\traditional\startup\c018i.c
                                           #define RND 6                                                                    C:\mcc18\src\traditional\startup\c018i.c
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           #pragma code _entry_scn=0x000000                                                 C:\mcc18\src\traditional\startup\c018i.c
                                           void                                                                             C:\mcc18\src\traditional\startup\c018i.c
                                           _entry (void)                                                                    C:\mcc18\src\traditional\startup\c018i.c
                                           {                                                                                C:\mcc18\src\traditional\startup\c018i.c
000000   ef65     GOTO      0xca           _asm goto _startup _endasm                                                       C:\mcc18\src\traditional\startup\c018i.c
000002   f000                                                                                                               
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
000004   0012     RETURN    0x0            }                                                                                C:\mcc18\src\traditional\startup\c018i.c
                                           #pragma code _startup_scn                                                        C:\mcc18\src\traditional\startup\c018i.c
                                           void                                                                             C:\mcc18\src\traditional\startup\c018i.c
                                           _startup (void)                                                                  C:\mcc18\src\traditional\startup\c018i.c
                                           {                                                                                C:\mcc18\src\traditional\startup\c018i.c
                                             _asm                                                                           C:\mcc18\src\traditional\startup\c018i.c
                                               // Initialize the stack pointer                                              C:\mcc18\src\traditional\startup\c018i.c
0000ca   ee1d     LFSR      0x1,0xd00          lfsr 1, _stack lfsr 2, _stack clrf TBLPTRU, 0 // 1st silicon doesn't do this on POR C:\mcc18\src\traditional\startup\c018i.c
0000cc   f000                                                                                                               
0000ce   ee2d     LFSR      0x2,0xd00                                                                                       
0000d0   f000                                                                                                               
0000d2   6af8     CLRF      0xf8,0x0                                                                                        
0000d4   9c01     BCF       0x1,0x6,0x0        bcf FPFLAGS,RND,0 // Initialize rounding flag for floating point libs        C:\mcc18\src\traditional\startup\c018i.c
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                               _endasm                                                                      C:\mcc18\src\traditional\startup\c018i.c
0000d6   ec16     CALL      0x2c,0x0           _do_cinit ();                                                                C:\mcc18\src\traditional\startup\c018i.c
0000d8   f000                                                                                                               
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           loop:                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                             // Call the user's main routine                                                C:\mcc18\src\traditional\startup\c018i.c
0000da   ec71     CALL      0xe2,0x0         main ();                                                                       C:\mcc18\src\traditional\startup\c018i.c
0000dc   f000                                                                                                               
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
0000de   d7fd     BRA       0xda             goto loop;                                                                     C:\mcc18\src\traditional\startup\c018i.c
0000e0   0012     RETURN    0x0            }                               /* end _startup() */                             C:\mcc18\src\traditional\startup\c018i.c
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           /* MPLAB-C18 initialized data memory support */                                  C:\mcc18\src\traditional\startup\c018i.c
                                           /* The linker will populate the _cinit table */                                  C:\mcc18\src\traditional\startup\c018i.c
                                           extern far rom struct                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           {                                                                                C:\mcc18\src\traditional\startup\c018i.c
                                             unsigned short num_init;                                                       C:\mcc18\src\traditional\startup\c018i.c
                                             struct _init_entry                                                             C:\mcc18\src\traditional\startup\c018i.c
                                             {                                                                              C:\mcc18\src\traditional\startup\c018i.c
                                               unsigned long from;                                                          C:\mcc18\src\traditional\startup\c018i.c
                                               unsigned long to;                                                            C:\mcc18\src\traditional\startup\c018i.c
                                               unsigned long size;                                                          C:\mcc18\src\traditional\startup\c018i.c
                                             }                                                                              C:\mcc18\src\traditional\startup\c018i.c
                                             entries[];                                                                     C:\mcc18\src\traditional\startup\c018i.c
                                           }                                                                                C:\mcc18\src\traditional\startup\c018i.c
                                           _cinit;                                                                          C:\mcc18\src\traditional\startup\c018i.c
                                                                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                           #pragma code _cinit_scn                                                          C:\mcc18\src\traditional\startup\c018i.c
                                           void                                                                             C:\mcc18\src\traditional\startup\c018i.c
                                           _do_cinit (void)                                                                 C:\mcc18\src\traditional\startup\c018i.c
                                           {                                                                                C:\mcc18\src\traditional\startup\c018i.c
                                             /* we'll make the assumption in the following code that these statics          C:\mcc18\src\traditional\startup\c018i.c
                                              * will be allocated into the same bank.                                       C:\mcc18\src\traditional\startup\c018i.c
                                              */                                                                            C:\mcc18\src\traditional\startup\c018i.c
                                             static short long prom;                                                        C:\mcc18\src\traditional\startup\c018i.c
                                             static unsigned short curr_byte;                                               C:\mcc18\src\traditional\startup\c018i.c