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Diffstat (limited to 'contrib/syslinux-4.02/sample/hello.c')
-rw-r--r-- | contrib/syslinux-4.02/sample/hello.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/sample/hello.c b/contrib/syslinux-4.02/sample/hello.c new file mode 100644 index 0000000..25ceb8b --- /dev/null +++ b/contrib/syslinux-4.02/sample/hello.c @@ -0,0 +1,43 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 2002-2008 H. Peter Anvin - All Rights Reserved + * + * 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, Inc., 53 Temple Place Ste 330, + * Boston MA 02111-1307, USA; either version 2 of the License, or + * (at your option) any later version; incorporated herein by reference. + * + * ----------------------------------------------------------------------- */ + +/* + * hello.c + * + * Simple COM32 image + */ + +#include <com32.h> + +#define NULL ((void *)0) + +static inline void memset(void *buf, int ch, unsigned int len) +{ + asm volatile ("cld; rep; stosb":"+D" (buf), "+c"(len):"a"(ch):"memory"); +} + +int __start(void) +{ + const char *msg = "Hello, World!\r\n"; + com32sys_t inreg; + const char *p; + + memset(&inreg, 0, sizeof inreg); + + for (p = msg; *p; p++) { + inreg.edx.b[0] = *p; + inreg.eax.b[1] = 0x02; /* Write Character */ + __com32.cs_intcall(0x21, &inreg, NULL); + } + + return 0; +} |