Jump to Sub-Routine?

6800: http://www.8bit-era.cz/6800.html

6502: http://www.6502.org/tutorials/6502opcodes.html#JSR

PDP-11: https://programmer209.wordpress.com/2011/08/03/the-pdp-11-as...

Motorola 68000: https://mrjester.hapisan.com/04_MC68/Sect05Part05/Index.html

Jump to New Location Saving Return Address: JSR [1]

Jumps to a subroutine

The address before the next instruction (PC - 1) is pushed onto the stack: first the upper byte followed by the lower byte. As the stack grows backwards, the return address is therefore stored as a little-endian number in memory. PC is set to the target address.

   Flags: none
   Addressing Mode: absolute
   Opcode: 20

 [1] https://en.wikibooks.org/wiki/6502_Assembly

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