1. Most current computer instruction sets are based on a general purpose register model. 2. It had thirty-one 32-bit general purpose registers , but no Alpha. 3. CR16 has 16 general purpose registers of 16 bits, and address registers of 21 bits wide. 4. For example, the MOS Technology 6502 has only one general purpose register ( the accumulator ). 5. It had sixteen 32-bit general purpose registers and used 32-bit addresses and data paths. 6. The chip contained seven 8-bit general purpose registers , although only four were visible at any time. 7. Generally accepted standards, although by no means mandatory, include the identification of general purpose registers with mnemonics. 8. Virtual addresses 0 thru 15 are reserved to reference the corresponding general purpose register , and are not mapped. 9. The particular address in the list of addresses may be extracted using an index, general purpose register or pointer. 10. The subroutine typically requires standard function prologue and epilogue usually saving general purpose registers and return address as a minimum ).
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