1594 #define W0         write_sx_byte (board, i, 0x55)  macro
1610 	MARCHUP	 {W0;}  in do_memtest()
1611 	MARCHUP   {R0;W1;R1;W0;R0;W1;}  in do_memtest()
1612 	MARCHUP   {R1;W0;W1;}  in do_memtest()
1613 	MARCHDOWN {R1;W0;W1;W0;}  in do_memtest()
1614 	MARCHDOWN {R0;W1;W0;}  in do_memtest()
1622 #undef W0
1629 #define W0         write_sx_word (board, i, 0x55aa)  macro
1641 	MARCHUP   {W0;}
1642 	MARCHUP   {R0;W1;R1;W0;R0;W1;}
1643 	MARCHUP   {R1;W0;W1;}
1644 	MARCHDOWN {R1;W0;W1;W0;}
1645 	MARCHDOWN {R0;W1;W0;}