Understanding the Apple IIe : Enhanced Edition

We are pleased to present the definitive source of information about how the Apple IIe works. Jim Sather has followed up his exhaustive analysis of the inner workings of the Apple II computer with an even more detailed analysis of the Apple IIe. His findings are documented in a way that will benefit everyone interested in microcomputer technology. Steve Wozniak, "Understanding the Apple IIe leaves no stone unturned in the search into the inner workings of the Apple IIe computer." - Originally published in 1985, this "Enhanced Edition" is remastered with updated text, layout, color, and over 110 technical illustrations. - All Apple IIe motherboard circuits, including diagrams and descriptions of the inner workings of the MMU, IOU, and timing HAL. - Disk controller operation, including previously undocumented details about the logic state sequencer. - Reveals previously unnoticed features of Apple graphics. Explains Double High-Resolution. - Differences between the Apple II and Apple IIe. - 15 hardware and software Application Notes such as split screen programming, modifications to EPROM, disk write protect, and the DOS HOSS firmware card. - A chapter on maintenance that provides simple troubleshooting steps. - PAL (European) IIe motherboard video circuits. - Valuable programming reference material. - Documents the Enhanced IIe firmware upgrade, Apple IIe Platinum, and international models.