Description:

Pop the top short off the stack and use it as a 0-based absolute (from bottom) offset parameter.  Pop the new top byte off the stack and place it in the stack as specified by the offset parameter.

Pseudo Code:

absIndex = (short) stack[sp - 2]
byteVal = stack[sp - 3]
stack[absIndex] = byteVal
sp = sp - 3
pc = pc + 1

Flags Affected:

D	H	C	Z	N

Possible Errors:

tvmStackUnderflow	-	There are not enough bytes on the stack .
tvmStackError	-	The stack index is invalid.

Example:

popbsax

Before stack   top 1 0x03 2 0x00 3 0x03 4 0xAA 5 0x32 6 0x02 7 0x23 8 0x68 9 0x26   bottom

After stack   top 1 0xAA 2 0x32 3 0x03 4 0x23 5 0x68 6 0x26   bottom