46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
#ident "$Id: hello.c,v 1.6 2005/01/03 08:23:16 hpa Exp $"
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/* ----------------------------------------------------------------------- *
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*
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* Copyright 2002 H. Peter Anvin - All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, Inc., 53 Temple Place Ste 330,
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* Boston MA 02111-1307, USA; either version 2 of the License, or
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* (at your option) any later version; incorporated herein by reference.
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*
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* ----------------------------------------------------------------------- */
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/*
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* hello.c
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*
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* Simple COM32 image
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*/
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#include <com32.h>
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#define NULL ((void *)0)
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static inline void memset(void *buf, int ch, unsigned int len)
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{
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asm volatile("cld; rep; stosb"
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: "+D" (buf), "+c" (len) : "a" (ch) : "memory");
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}
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int __start(void)
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{
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const char *msg = "Hello, World!\r\n";
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com32sys_t inreg;
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const char *p;
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memset(&inreg, 0, sizeof inreg);
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for ( p = msg ; *p ; p++ ) {
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inreg.edx.b[0] = *p;
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inreg.eax.b[1] = 0x02; /* Write Character */
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__com32.cs_intcall(0x21, &inreg, NULL);
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}
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return 0;
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}
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