byte_offset       678 src/dps8/dps8_crdpun.c           int byte_offset   = nibble_index / 2;
byte_offset       684 src/dps8/dps8_crdpun.c             byte_buffer [byte_offset] |= nibble;
byte_offset       686 src/dps8/dps8_crdpun.c             byte_buffer [byte_offset] |= (nibble << 4);
byte_offset       521 src/dps8/dps8_crdrdr.c         int byte_offset = current_nibble / 2;
byte_offset       525 src/dps8/dps8_crdrdr.c         word12 nibble = (current_nibble & 0x1) ? byte_buffer[byte_offset] : (byte_buffer[byte_offset] >> 4);