Editing Atari Mega STE (section)

=== VMEbus expansion ===

The Mega STE includes a single '''3U VMEbus''' expansion slot inside the case, accessible by removing the top cover.<ref name="vmespec">{{cite web |url=http://dev-docs.atariforge.org/files/VME_Spec_7-19-1991.pdf |title=Atari VME Expansion for TT030 and Mega STE Products |publisher=Atari Corporation |date=1991-07-19 |access-date=2026-03-27}}</ref> This slot conforms to a subset of the VMEbus standard and provides access to the 68000's address and data buses.

VME expansion cards used with the Mega STE include:
* '''ET4000-based VGA cards''' — Providing higher-resolution display output (e.g., 1024 &times; 768) via VME-to-VGA adapters.
* '''Ethernet adapters''' — PAMs NetUS and similar cards providing 10 Mbit/s Ethernet networking.
* '''Crazy Dots''' — Graphics accelerator cards by Matrix.

The VME slot is physically identical between the Mega STE and the TT030, and most VME cards are compatible with both systems, though software driver compatibility varies.