[Snip] The problem is as Tom, says the unless you have a DEC keyboard layout, you are mapping something and that tends the be source of much discomfort. I use the VT100 emulator under Ersatz-11 which provides support to re-define keys. In particular, on a PC 104 key keyboard, the <CTRL> key is in the wrong place and the <SCROLL> / <NOSCROLL> key does not exist. The solution was solved by the suggestion that John Wilson makes for Ersatz-11 to use the <CapsLock> key as the <LCTRL> key and I added my own definition to the original <LCTRL> key to become the VT100 equivalent of the <SCROLL> / <NOSCROLL> key with the additional functionality that the Ersatz-11 KEYPRESS sends the <CTRL/S> character and the KEYRELEASE sends the <CTRL/Q> character. I found that since the screen displays so quickly under Ersatz-11 that it was impossible to react quickly enough to start and stop the scrolling if the key had to be pressed twice as with the actual VT100. So I do not have to hold the key down permanently to hold the scrolling stopped, when I also hold the <LSHIFT> key at the same time I am releasing (KEYRELEASE), the <CTRL/Q> character is not sent. These two changes managed to map the PC 104 key keyboard to the VT100 as well as I can expect and I am more than pleased with the results. Jerome Fine