 The module also contained a REXMI chip set, whose purpose was to interface the Rigel chip set's DAL (data and address line) bus to the XCI ASIC, the user side of the XMI corner interface.The REXMI chip set was composed of the XCA controller/address chip and two XCP data path chips.The XCA and XCP were ASICs developed using a standard-cell methodology and fabricated in Digital's CMOS-2 process.