![]() The Lisa also supported an optional, external hard drive through a built-in parallel port. Instead, the Lisa hardware designers (Paul Baker, Bob Paratore and others) solved the problem by including a little Apple II, with its own memory and microprocessor (but clocked twice as fast), inside the Lisa to control the Twiggy drives. Twiggy used a Woz-style disk controller, which created a problem for the Lisa designers, since that required exact timing from the microprocessor and therefore couldn't tolerate interrupts, which was perhaps OK for a simple system like the Apple II but was unacceptable for a more sophisticated system like Lisa. The Lisa was designed to include two built-in Twiggy drives, so it made sense for the Macintosh to use Twiggy as well. Twiggy was a fairly ambitious project, more than quadrupling the capacity of standard floppy disks by doubling the data rate (which required higher density media) and employing other innovative tricks like motor speed control, which slowed down the disk rotation speed on the outer tracks to cram more data on them. Woz's Apple II floppy disk design was way ahead of the rest of the industry, so Apple felt confident that it could continue to innovate to extend its lead. At Rod Holt's request, I had written some early diagnostics for Twiggy using an Apple II, but I felt lucky that they asked Rich Williams instead of me to transfer to the disk division as their software guy, since focusing exclusively on disks seemed pretty limiting. ![]() ![]() Both were intended to be used first by the Lisa project, and eventually across Apple's entire product line. Other system and product names are generally trademarks or registered trademarks of their respective owners.In 1980, Apple reorganized again, splitting off a new "Disk Division" headed by John Vennard, responsible for developing a hard disk code-named "Pippin" and a next generation floppy disk code-named "Twiggy".Wi-Fi® is a registered trademark of Wi-Fi Alliance®.Spotify is a registered trademark of Spotify Ltd.Intel and Intel Core are trademarks of Intel Corporation or its subsidiaries in the U.S.Google Play and Android are trademarks of Google LLC.'Blu-ray Disc™' and 'Blu-ray™' are trademarks of the Blu-ray Disc Association.Other trademarks and trade names are those of their respective owners. and any use of such marks by Sony Interactive Entertainment Inc. The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc.App Store, iPad, iPhone, Mac and macOS are trademarks of Apple Inc.'SONY' is a registered trademark or trademark of Sony Corporation.', 'PlayStation', 'PS5', 'PS4' and 'DUALSHOCK' are registered trademarks or trademarks of Sony Interactive Entertainment Inc.Information about system functionality and images published on this site may vary depending on the PS5 or PS4 system software version or the version of the application installed on your computer or mobile device that's in use. ![]() Illustrations and screen images may vary from the actual product. This site is subject to change without notice.For details on audio input and output during Remote Play, visit our support website.Some or all video content might not be displayed on your device depending on the game or video service.You can't use Share Screen or Share Play, or broadcast your gameplay.The following restrictions apply when using Remote Play:
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