Editing Atari ST (section)

===ST<sup>E</sup>===
As originally released in the '''520ST<sup>E</sup>/1040ST<sup>E</sup>''':

*All of the features of the 520STFM/1040STFM
*Extended palette of 4,096 available colours to choose from
*Hardware-support for horizontal and vertical fine scrolling and split screen (using the Shifter video chip)
*DMA [[sound chip]] with 2-channels stereo 8-bit PCM sound at 6.25/12.5/25/50&nbsp;kHz and stereo RCA audio-out jacks (using enhancements to the Shifter video chip to support audio shifting)
*National LMC 1992 audio controller chip, allowing adjustable left/right/master volume and bass and treble EQ via a "Microwire" (3-bit serial) interface
*Memory: 30-pin SIMM memory slots allowing upgrades up to 4 MB Allowable memory sizes including only 0.5, 1.0, 2.0, 2.5, 3.0, and 4.0 MB due to configuration restraints (however, 2.5 and 3.0 MB are unsupported and have compatibility problems). Later 3rd-party upgrade kits allow a maximum of 14MB, bypassing the stock [[Memory management unit|MMU]]
*Ability to synchronise the video-timings with an external device so that a video Genlock device can be used without having to make any modifications to computer's hardware
*Analogue joypad ports (2), with support for devices such as paddles and light pens in addition to joysticks/joypads. The [[Atari Jaguar]] joypads and Power Pad joypads (grey version of Jaguar joypads marketed for the ST<sup>E</sup> and [[Atari Falcon|Falcon]]) can be used without an adaptor. Two standard Atari-style digital joysticks could be plugged into each analogue port with an adaptor.
*[[Atari TOS|TOS]] 1.06 (also known as TOS 1.6) or TOS 1.62 (which fixed some major backwards-compatibility bugs in TOS 1.6) in two socketed 128 KB ROM chips.
*Socketed PLCC 68000 [[CPU]]