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SAB 80C166 Registers B.1 CPU General Purpose Registers (GPRs) CPU General Purpose Registers are accessed via the Context Pointer (CP). The Context Pointer must be programmed such that the accessed GPRs are always located in the internal RAM space. All GPRs are bit addressable. B.1.1 Name R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 Word Registers Physical Address (CP)+0 (CP)+2 (CP)+4 (CP)+6 (CP)+8 (CP)+10 (CP)+12 (CP)+14 (CP)+16 (CP)+18 (CP)+20 (CP)+22 (CP)+24 (CP)+26 (CP)+28 (CP)+30 Semiconductor Group 8-Bit Address F0h F1h F2h F3h F4h F5h F6h F7h F8h F9h FAh FBh FCh FDh FEh FFh Description CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register CPU General Purpose Register B–2 R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 Reset Value XXXXh XXXXh XXXXh XXXXh XXXXh XXXXh XXXXh XXXXh XXXXh XXXXh XXXXh XXXXh XXXXh XXXXh XXXXh XXXXh
