.TH ATARI 1 .SH NAME 2600 \- emulator .SH SYNOPSIS .B games/2600 [ .B -a ] [ .B -x .I scale ] .I romfile .SH DESCRIPTION .I 2600 is an emulator for the Atari 2600. It exectues the romfile given as an argument, and controls as if using a regular 4-direction 1-button joystick, using \fBspace\fR button and directional keys. The \fBq\fR, \fBw\fR, \fBe\fR and \fBr\fR keys correspond respectively to the reset, select, player 1 difficulty and color mode switches. Other keys: .TP F1 Pause the emulator. If already paused it will step one video frame. .TP F12 Toggle the emulator's speedometer. It shows in the upper left, off-viewport corner, the ratio between the expected and observed time it took to draw 60 frames. .TP t Toggle tracing of the emulator. .TP ` It uncaps the 60fps frame rate and lets emulation go as fast as possible. .TP Esc Pause the emulator. .TP Del Exit the emulator. .PP Command line options: .TP .B -a Enable audio output. .TP .B -x Scale the screen to a given factor regardless of the window's size. .SH SOURCE .B /sys/src/games/2600 .SH BUGS Yes. .SH HISTORY .I 2600 first appeared in 9front (November, 2014).