git.gag.com Git - fw/sdcc/blob - as/mcs51/lks19.c

   1 /* lks19.c */
   2
   3 /*
   4  * (C) Copyright 1989-1995
   5  * All Rights Reserved
   6  *
   7  * Alan R. Baldwin
   8  * 721 Berkeley St.
   9  * Kent, Ohio  44240
  10  */
  11
  12 #include <stdio.h>
  13 #include <string.h>
  14 //#if !defined(_MSC_VER)
  15 //#include <alloc.h>
  16 //#endif
  17 #include "aslink.h"
  18
  19 /*)Module       lks19.c
  20  *
  21  *      The module lks19.c contains the function to
  22  *      output the relocated object code in the
  23  *      Motorola S19 format.
  24  *
  25  *      lks19.c contains the following function:
  26  *              VOID    s19(i)
  27  *
  28  *      lks19.c contains no local variables.
  29  */
  30
  31 /*)S19 Format
  32  *      Record Type Field    -  This  field  signifies  the  start  of a
  33  *                              record and  identifies  the  the  record
  34  *                              type as follows:
  35  *
  36  *                                  Ascii S1 - Data Record
  37  *                                  Ascii S9 - End of File Record
  38  *
  39  *      Record Length Field  -  This  field  specifies the record length
  40  *                              which includes the  address,  data,  and
  41  *                              checksum   fields.   The  8  bit  record
  42  *                              length value is converted to  two  ascii
  43  *                              characters, high digit first.
  44  *
  45  *      Load Address Field   -  This  field  consists  of the four ascii
  46  *                              characters which result from  converting
  47  *                              the  the  binary value of the address in
  48  *                              which to begin loading this record.  The
  49  *                              order is as follows:
  50  *
  51  *                                  High digit of high byte of address.
  52  *                                  Low digit of high byte of address.
  53  *                                  High digit of low byte of address.
  54  *                                  Low digit of low byte of address.
  55  *
  56  *                              In an End of File record this field con-
  57  *                              sists of either four ascii zeros or  the
  58  *                              program  entry  address.   Currently the
  59  *                              entry address option is not supported.
  60  *
  61  *      Data Field           -  This  field consists of the actual data,
  62  *                              converted to two ascii characters,  high
  63  *                              digit first.  There are no data bytes in
  64  *                              the End of File record.
  65  *
  66  *      Checksum Field       -  The  checksum  field is the 8 bit binary
  67  *                              sum of the record length field, the load
  68  *                              address field, and the data field.  This
  69  *                              sum is then  complemented  (1's  comple-
  70  *                              ment)   and   converted   to  two  ascii
  71  *                              characters, high digit first.
  72  */
  73
  74 /*)Function     s19(i)
  75  *
  76  *              int     i               0 - process data
  77  *                                      1 - end of data
  78  *
  79  *      The function s19() outputs the relocated data
  80  *      in the standard Motorola S19 format.
  81  *
  82  *      local variables:
  83  *              Addr_T  chksum          byte checksum
  84  *
  85  *      global variables:
  86  *              int     hilo            byte order
  87  *              FILE *  ofp             output file handle
  88  *              int     rtcnt           count of data words
  89  *              int     rtflg[]         output the data flag
  90  *              Addr_T  rtval[]         relocated data
  91  *
  92  *      functions called:
  93  *              int     fprintf()       c_library
  94  *
  95  *      side effects:
  96  *              The data is output to the file defined by ofp.
  97  */
  98
  99 VOID
 100 s19(i)
 101 {
 102         register Addr_T chksum;
 103
 104         if (i) {
 105                 if (hilo == 0) {
 106                         chksum = rtval[0];
 107                         rtval[0] = rtval[1];
 108                         rtval[1] = chksum;
 109                 }
 110                 for (i = 0, chksum = 1; i < rtcnt; i++) {
 111                         if (rtflg[i])
 112                                 chksum++;
 113                 }
 114                 fprintf(ofp, "S1%02X", chksum);
 115                 for (i = 0; i < rtcnt ; i++) {
 116                         if (rtflg[i]) {
 117                                 fprintf(ofp, "%02X", rtval[i]);
 118                                 chksum += rtval[i];
 119                         }
 120                 }
 121                 fprintf(ofp, "%02X\n", (-chksum-1) & 0xff);
 122         } else {
 123                 fprintf(ofp, "S9030000FC\n");
 124         }
 125 }