Although not an extension of the Apple II line, in 1990 the Apple IIe Card, an expansion card for the Macintosh LC, was released. Essentially a miniaturized Apple IIe computer on a card (using the Mega II chip from the Apple IIGS), it allowed the Macintosh to run 8-bit Apple IIe software through hardware emulation, with an option to run at roughly double the speed of the original IIe (about 1.8 MHz). However, the video output was emulated in software, and, depending on how much of the screen the currently running program was trying to update in a single frame, performance could be much slower compared to a real IIe. This is due to the fact that writes from the 65C02 on the IIe Card to video memory were caught by the additional hardware on the card, so the video emulation software running on the Macintosh side could process that write and update the video display. But, while the Macintosh was processing video updates, execution of Apple II code would be temporarily halted.
Although not an extension of the Apple II line, in 1990 the Apple IIe Card, an expansion card for the Macintosh LC, was released. Essentially a miniaturized Apple IIe computer on a card (using the Mega II chip from the Apple IIGS) it allowed the Macintosh to run 8-bit Apple IIe software through hardware emulation, with an option to run at roughly double the speed of the original IIe (about 1.8 MHz). However, the video output was emulated in software, and, depending on how much of the screen the currently running program was trying to update in a single frame, performance could be much slower compared to a real IIe. This is due to the fact that writes from the 65C02 on the IIe Card to video memory were caught by the additional hardware on the card, so the video emulation software running on the Macintosh side could process that write and update the video display. But, while the Macintosh was processing video updates, execution of Apple II code would be temporarily halted.