OK I got around to trying it. Firstly it wouldn't start, needed COMDLG32.OCX which I found on the net. When I went to check the configuration of the keyboard, it died again because TABCTL32.OCX was missing, which was fixed the same way. The keyboard config shows numbers instead of key letters, so i decided to not change anything. I don't have an alternate input device. I tried out changing screen sizes, 2x, 3x works although it disappears for a couple of secs while doing so. 4x just causes the emulator to vanish and never comes back. I assume that because the size would be larger than my screen some sort of exception occurred (although it never said anything). EDIT: I found an hour later that it was in the task manager, consuming 15% cpu time, and killed it off. Must have got stuck in a loop. I tried 2 games, the first was a daffy duck game, the second being lemmings. They both ran as expected, although no sound, and seemed to be rather slow. There's no frame counter so I couldn't be sure. I tried dragging the rom onto the executable but this gives a black screen. I also tried dragging the rom onto the open window, but again, it didn't start. Incidently, the daffy duck game has an inbuilt music and sound test option which could come in handy later. The settings are remembered, but it took a little while to find where they are stored. It's in the registry, at HKCU\Software\VB and VBA Program Settings\olafsms - in case you want to reset back to default. If a game is running, you need to click the X twice to close. For a first release, and only 42kb in size, this is a remarkable effort. Go Olaf! To answer IJTF_Cinder, I had no delay when opening the emulator, although there is a few seconds delay between opening a rom and the game starting. I didn't get any black frames although when closing the emulator the whole screen flashed black. It doesn't appear to be UPX'd or compressed at first glance.