IP2022 User’s Manual—System Architecture www.ubicom.com 39 Figure 2-5  Interrupt Processing (On Entry to the ISR) On  return  from  the  ISR,  these  registers  are  restored  from  the
shadow registers, as shown in Figure 2-6. INTVECH/INTVECL Register W Register STATUS Register MULH Register IPH/IPL Register DPH/DPL Register SPH/SPL Register ADDRSEL Register DATAH/DATAL Register 515-068.eps               W
Shadow Register 1          STATUS
Shadow Register 1            MULH
Shadow Register 1           IPH/IPL
Shadow Register 1         DPH/DPL
Shadow Register 1         SPH/SPL
Shadow Register 1        ADDRSEL
Shadow Register 1     DATAH/DATAL
Shadow  Register 1 IPCH/IPCL Register PC               W
Shadow Register 2          STATUS
Shadow Register 2            MULH
Shadow Register 2           IPH/IPL
Shadow Register 2         DPH/DPL
Shadow Register 2         SPH/SPL
Shadow Register 2        ADDRSEL
Shadow Register 2     DATAH/DATAL
Shadow  Register 2 INTSPD Register SPDREG Register         SPDREG
Shadow Register 1         SPDREG
Shadow Register 2 IPCH/IPCL Shadow Register