【MZ80,Z88DK】C言語でキースキャン

#include <stdio.h>
#define PEEK( off ) ( *(unsigned char*)( off ) )
#define POKE( off, val )    ( *(unsigned char*)( off ) = ( val ) )
#define TRUE    1
void main()
{
    while( TRUE ){
        for( int i = 0; i < 10; i++ ){
            POKE( 0xe000, i );
            printf( "%x ", PEEK( 0xe001 ) );
        }
        printf( "\n" );
    }
}