/*
 * print_hex — print a single byte as two uppercase hex digits.
 *
 * No printf yet; this is what bare-metal debug looks like in stage 3.
 */

#include <stdio.h>
#include <sprinter.h>

void print_hex(uint8_t v)
{
    static const char digits[] = "0123456789ABCDEF";
    putchar(digits[(v >> 4) & 0x0F]);
    putchar(digits[v & 0x0F]);
}