Description:

Pop the top byte off the stack as a relative (from the top) 1-based stack index.  Read a short from the referenced stack location and push it onto the stack.

Pseudo Code:

offset = stack[sp - 1]
sp = sp - 1
stack[sp] = (short) stack[top - relStackRef]
sp = sp + 2
pc = pc + 1

Flags Affected:

D	H	C	Z	N

Possible Errors:

tvmStackUnderflow	-	There were not enough bytes in the stack to get the relative index.
tvmStackOverflow	-	The short will not fit on the stack.
tvmStackError	-	The stack index is invalid.

Example:

pushssx

This operation pops off an index of 3.  Then it gets a short starting at the third byte from the new top of the stack and pushes it back onto the stack.

Before stack   top 1 0x03 2 0x80 3 0x00 4 0xAA 5 0x32 6 0x02   bottom

After stack   top 1 0x00 2 0xAA 3 0x80 4 0x00 5 0xAA 6 0x32 7 0x02   bottom