At 02:18 PM 3/22/98 -0600, you wrote: > >so is it like a call or a jump? > A rst instruction is a call to the address in the instruction ($0008,$0010,$0018,etc.). The reason to use the rst instead of a call is that the rst instruction is only one byte long, where a call is 3 bytes. Also I think the rst is probably faster... --Joshua