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/* lks19.c
Copyright (C) 1989-1998 Alan R. Baldwin
721 Berkeley St., Kent, Ohio 44240
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <string.h>
#include "sdld.h"
#include "aslink.h"
/*)Module lks19.c
*
* The module lks19.c contains the functions to
* output the relocated object code in the
* Motorola S19 format.
*
* lks19.c contains the following functions:
* VOID s19()
* VOID sflush()
*
* lks19.c contains no local variables.
*/
/*)S19 Format
* Record Type Field - This field signifies the start of a
* record and identifies the the record
* type as follows:
*
* Ascii S1 - Data Record
* Ascii S9 - End of File Record
*
* Record Length Field - This field specifies the record length
* which includes the address, data, and
* checksum fields. The 8 bit record
* length value is converted to two ascii
* characters, high digit first.
*
* Load Address Field - This field consists of the four ascii
* characters which result from converting
* the the binary value of the address in
* which to begin loading this record. The
* order is as follows:
*
* High digit of high byte of address.
* Low digit of high byte of address.
* High digit of low byte of address.
* Low digit of low byte of address.
*
* In an End of File record this field con-
* sists of either four ascii zeros or the
* program entry address. Currently the
* entry address option is not supported.
*
* Data Field - This field consists of the actual data,
* converted to two ascii characters, high
* digit first. There are no data bytes in
* the End of File record.
*
* Checksum Field - The checksum field is the 8 bit binary
* sum of the record length field, the load
* address field, and the data field. This
* sum is then complemented (1's comple-
* ment) and converted to two ascii
* characters, high digit first.
*/
/*)Function s19(i)
*
* int i 0 - process data
* 1 - end of data
*
* The function s19() loads the output buffer with
* the relocated data.
*
* local variables:
* a_uint j temporary
*
* global variables:
* int hilo byte order
* FILE * ofp output file handle
* int rtcnt count of data words
* int rtflg[] output the data flag
* a_uint rtval[] relocated data
* char rtbuf[] output buffer
* a_uint rtadr0 address temporary
* a_uint rtadr1 address temporary
* a_uint rtadr2 address temporary
*
* functions called:
* int fprintf() c_library
* VOID sflush() lks19.c
*
* side effects:
* The data is placed into the output buffer.
*/
/*
* The maximum number of Data Field bytes is NMAX less:
* 2 Record Type Field
* 2 Record Length Field
* 4 Load Address Field
* 2 Checksum Field
*
* Divided by 2 (2 characters per byte)
*/
#define MAXBYTES ((NMAX - 10)/2)
VOID
s19(int i)
{
a_uint j;
int k;
if (i) {
if (TARGET_IS_6808 && ap->a_flag & A_NOLOAD)
return;
if (hilo == 0) {
j = rtval[0];
rtval[0] = rtval[1];
rtval[1] = j;
}
rtadr2 = rtval[0] << 8 | rtval[1];
if (rtadr2 != rtadr1) {
/*
* data bytes not contiguous between records
*/
sflush();
rtadr0 = rtadr1 = rtadr2;
}
for (k=2; k<rtcnt; k++) {
if (rtflg[k]) {
rtbuf[rtadr1++ - rtadr0] = rtval[k];
if (rtadr1 - rtadr0 == MAXBYTES) {
sflush();
}
}
}
} else {
sflush();
fprintf(ofp, "S9030000FC\n");
}
}
/*)Function sflush()
*
* The function sflush() outputs the relocated data
* in the standard Motorola S19 format.
*
* local variables:
* a_uint chksum byte checksum
* int i loop counter
* int max number of data bytes
* int reclen record length
*
* global variables:
* FILE * ofp output file handle
* char rtbuf[] output buffer
* a_uint rtadr0 address temporary
* a_uint rtadr1 address temporary
*
* functions called:
* int fprintf() c_library
*
* side effects:
* The data is output to the file defined by ofp.
*/
/*
* Written by G. Osborn, gary@s-4.com, 6-17-98.
* The new version concatenates the assembler
* output records when they represent contiguous
* memory segments to produces NMAX character
* S-19 output lines whenever possible, resulting
* in a substantial reduction in file size.
* More importantly, the download time
* to the target system is much improved.
*/
VOID
sflush()
{
a_uint chksum;
a_uint i, max, reclen;
max = rtadr1 - rtadr0;
if (max == 0) {
return;
}
/*
* Only the "S1" and the checksum itself are excluded
* from the checksum. The record length does not
* include "S1" and the pair count. It does
* include the two address bytes, the data bytes,
* and the checksum.
*/
reclen = max + 3;
chksum = reclen;
chksum += rtadr0;
chksum += rtadr0 >> 8;
fprintf(ofp, "S1%02X%04X", reclen, rtadr0);
for (i=0; i<max; i++) {
chksum += rtbuf[i];
fprintf(ofp, "%02X", rtbuf[i] & 0x00ff);
}
/*
* 1's complement
*/
fprintf(ofp, "%02X\n", (~chksum) & 0x00ff);
rtadr0 = rtadr1;
}
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