Description:

Push a byte from the stack as specified by the 1-based relative (from top) offset parameter and push it onto the top of the stack.

Data (1 byte):

byte: byte value that represents the offset from the top of the stack stack to the value being pushed.

Pseudo Code:

offset = program[pc + 1];
byteVal = stack[sp - offset];
stack[sp] = byteVal;
sp = sp + 1
pc = pc + 2

Flags Affected:

D	H	C	Z	N

Possible Errors:

tvmStackOverflow	-	There is no more room on the stack to push the stack byte.
tvmStackError	-	The stack index is invalid.

Example:

pushsb 3

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

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