SM5A LCD delay can't be reduced. A few weeks ago, I did reduce it for SM51x games by factor two. But since you didn't notice it at all(a new complaint instead, yay), it's probably not due to LCD delay but something else. Several possibilities:
- everything on a PC will add lag(some apps more, some less), are other games on MAME laggy? Google around and you see people complaining everywhere about input lag on emulators, especially with reaction games like shootemups.
- the lag is due to input lag. Now this is a problem with MAME's old style design, where inputs are polled with each video frame and not when the game reads inputs. For example, you can't type fast on keyboard on a PC emulation driver due to the low input polling rate. A better design would be, max poll rate of let's say 500hz, then when a game reads an input port, refresh the OSD inputs.
- the lag you perceive is 'psychological', reaction time isn't like it was when you were a kid
*edit* for the 2nd one: I just tried increasing refresh rate for one of the G&W games to 120hz which should increase input polling rate too. But didn't notice any difference.
Last edited by hap; 09/28/19 08:55 AM.