1991/0629/pc/main.c (diff list | history)

1991/0625/sys/src/9/pc/main.c:1,15 – 1991/0629/sys/src/9/pc/main.c:1,56 (short | long | prev | next)
1991/0625		main(void)
1991/0629		#include <u.h> #define WIDTH 80 #define HEIGHT 22 #define SCREEN ((char *)0xB8000) int pos; void prchar(int x)
1991/0625		{
1991/0629		if(x == '\n'){ pos = pos/WIDTH; pos = (pos+1)*WIDTH; } else { SCREEN[pos++] = x; SCREEN[pos++] = 0x43; } if(pos >= WIDTH*HEIGHT) pos = 0;
1991/0625		} trap(void)
1991/0629		void prstr(char *s)
1991/0625		{
1991/0629		while(*s) prchar(*s++);
1991/0625		} edata(void)
1991/0629		void prdig(ulong x)
1991/0625		{
1991/0629		if(x < 0xA) prchar('0' + x); else prchar('A' + x);
1991/0625		} end(void)
1991/0629		void prhex(ulong x)
1991/0625		{
1991/0629		ulong y; if(x <= 0xF){ prdig(x); } else { y = x&0xF; prhex(x>>4); prdig(y); }
1991/0625		}
1991/0629		main(void) { prstr("hello world\n"); }