Editing Apple IIe Card (section)

== Host system compatibility ==
The card plugs into the [[Processor Direct Slot|PDS]] slot in many of the LC-series Macintoshes, but not all models and system software combinations are supported. Apple's [https://web.archive.org/web/20050507052233/http://www.mug.jhmi.edu/mirrors/infoalley/1196/15/apple.html Tech Info Library article #8458] lists the following models as Apple IIe Card-compatible: Color Classic, Colour Classic II, LC, LC II, III & III+; LC 475, 520, 550, 575; [[Quadra 605]] and Performa 4XX, 52X, 55X, 56X, and 57X. However, other [[Motorola 68000 series|68K]] models that have an LC-compatible PDS slot ''and'' support 24-bit [[memory addressing]] are generally compatible with the Apple IIe Card but are not officially supported. The host Macintosh requires Apple's emulation software (a boot disk) launched from System 6.0.8 to 7.5.5 in order to activate the IIe Card. [[System 7|Systems 7.0 through 7.5.5]] support both 24- and 32-bit addressing on suitable Macintosh models (from System 7.6 onwards, Macintosh system software does not support the required 24-bit addressing). 24-bit addressing can be enabled on supported systems with the Macintosh Memory control panel. The Apple IIe Card will not work with 32-bit addressing enabled or Macintosh System Software or machines locked to this mode.

Contrary to some sources,{{r|knight20180208}} the LC 630 and Quadra 630 are not compatible with the Apple IIe card because those computers do not support 24-bit mode.<ref>{{cite web |url=https://68kmla.org/bb/index.php?threads%2Fquadra-630-does-not-support-24-bit-memory-addressing-mode.40751%2F#post-455466 |title=Quadra 630 does not support 24-bit memory addressing mode |website=68kmla.org |date=15 April 2022 |first=David |last=Cook |access-date=March 10, 2023 |archive-date=February 15, 2023 |archive-url=https://web.archive.org/web/20230215173943/https://68kmla.org/bb/index.php?threads%2Fquadra-630-does-not-support-24-bit-memory-addressing-mode.40751%2F#post-455466 |url-status=live }}</ref><ref>{{cite web |url=https://support.apple.com/kb/SP229 |title=Macintosh Quadra 630: Technical Specifications |website=Apple.com |access-date=November 2, 2022 |archive-date=September 2, 2012 |archive-url=https://web.archive.org/web/20120902082847/http://support.apple.com/kb/SP229 |url-status=live }}</ref>