This is a description for a CMOS based mouse interface for the ATARI 800 8 bit computers, to be connected with a standard Amiga mouse. Some minor modifications might be necessary to use it with a different mouse. Files in this archive: MouseInterface.gif : The circuit, encoded in GIF. CMOSE.LST : The hardware driver, ATASCII list file CMOSE.ASM : The same file but in tokenized form for the MAC/65 assembler package by OSS (c). Pin-Layout : The pin layout of the mouse connectors, of the Atari joystick connector and of the CMOS circuits used. One of these files should be transfered to your Atari computer. The source code is well documented, but if you have trouble with it, contact me: Thomas Richter thor@math.tu-berlin.de Greetings, Thomas