NIBBLES_PER_COL   676 src/dps8/dps8_crdpun.c       for (int nibble_index = 0; nibble_index < (CARD_COL_COUNT * NIBBLES_PER_COL); nibble_index++)
NIBBLES_PER_COL   496 src/dps8/dps8_crdrdr.c #define NIBBLES_PER_CARD (CARD_COL_COUNT * NIBBLES_PER_COL)