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-rw-r--r--tap.c171
1 files changed, 171 insertions, 0 deletions
diff --git a/tap.c b/tap.c
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+++ b/tap.c
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+/*
+
+ int2tap - Convert an Intel segment file to a loadable Spectrum tape file
+
+ Copyright (C) 2004 Ian Cowburn (ianc@noddybox.demon.co.uk)
+
+ 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 2 of the License, 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, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ -------------------------------------------------------------------------
+
+*/
+static const char id[]="$Id$";
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "tap.h"
+
+static const char header_id[]=I2T_TAP_H;
+
+
+/* ---------------------------------------- CONSTANTS
+*/
+#undef TRUE
+#undef FALSE
+
+#define TRUE 1
+#define FALSE 0
+
+
+/* ---------------------------------------- TYPES
+*/
+
+
+/* ---------------------------------------- GLOBALS
+*/
+extern const char *progname;
+
+static FILE *fp;
+static int file_no;
+
+
+/* ---------------------------------------- PRIVATE FUNCTIONS
+*/
+unsigned char TapWord(unsigned w, unsigned char chk)
+{
+ putc(w&0xff,fp);
+ chk^=w&0xff;
+ putc(w>>8,fp);
+ chk^=w>>8;
+ return chk;
+}
+
+unsigned char TapByte(unsigned char c, unsigned char chk)
+{
+ putc(c,fp);
+ chk^=c;
+ return chk;
+}
+
+unsigned char TapString(char *p, int len, unsigned char chk)
+{
+ while(len--)
+ {
+ chk=TapByte(*p++,chk);
+ }
+
+ return chk;
+}
+
+unsigned char TapStream(const unsigned char p[0x10000],
+ unsigned addr, unsigned len, unsigned char chk)
+{
+ while(len--)
+ {
+ chk=TapByte(p[addr],chk);
+ addr=(addr+1)&0xffff;
+ }
+
+ return chk;
+}
+
+/* ---------------------------------------- INTERFACES
+*/
+
+int TapOpen(const char *filename)
+{
+ file_no=0;
+
+ if (!(fp=fopen(filename,"wb")))
+ {
+ fprintf(stderr,"%s: Failed to create %s\n",progname,filename);
+ }
+
+ return fp!=NULL;
+}
+
+
+void TapWrite(const unsigned char mem[0x1000],
+ unsigned addr, unsigned len, int is_code)
+{
+ char name[11]={0};
+ unsigned char chk;
+
+ sprintf(name,"%10.10d",file_no);
+ file_no=(file_no+1)%10000;
+
+ /* Output file header
+ */
+ chk=TapWord(19,chk);
+ chk=TapByte(0,chk);
+
+ if (is_code)
+ {
+ chk=TapByte(3,chk);
+ }
+ else
+ {
+ chk=TapByte(3,chk);
+ }
+
+ chk=TapString(name,10,chk);
+ chk=TapWord(len,chk);
+
+ if (is_code)
+ {
+ chk=TapWord(addr,chk);
+ chk=TapWord(32768,chk);
+ }
+ else
+ {
+ chk=TapWord(0,chk);
+ chk=TapWord(0,chk);
+ }
+
+ TapByte(chk,0);
+
+ /* Output file data
+ */
+ chk=0;
+
+ chk=TapWord(len+2,chk);
+ chk=TapStream(mem,addr,len,chk);
+ TapByte(chk,0);
+}
+
+
+void TapClose(void)
+{
+ if (fp)
+ {
+ fclose(fp);
+ fp=NULL;
+ }
+}
+
+
+/* END OF FILE */