section 7 - Index of

JSR Jump to Subroutine JSROperation:Assembler Syntax:SP+1 .... SP; PC .... SSH; SR .... SSL; Oxxx .... PC JSR xxxSP+ .... SP; PC .... SSH; SR .... SSL; ea-+PCJSR eaDescription: Jump to the subroutine whose location in program memory is given by theinstruction's effective address. The address of the instruction immediately following theJSR instruction (PC) and the system status register (SR) is pushed onto the systemstack. Program execution then continues at the specified effective address in programmemory. All memory alterable addressing modes may be used for the effective address.A fast short jump addressing mode may also be used. The 12-bit data is zero extendedto form the effective address.Restrictions: A JSR instruction used within a DO loop cannot specify the loopaddress (LA) as its target.A JSR instruction used within a DO loop cannot begin at the address LA within that DOloop.A JSR instruction cannot be repeated using the REP instruction.Example:JSR (R5)+;jump to subroutine at (R5), update R5Explanation of Example: In this example, program execution is transferred to the subroutineat address P:(R5) in program memory, and the contents of the R5 address registerare then updated.Condition Codes:I15 14 13 12 11 10 9 8 7 6 5 4 3 2 0LF I DM I T I ** I S1 I SO I 11... MR ....I 10 Is ILThe condition codes are not affected by this instruction.I E I u I N I z I vCCRI~I