“Spiradisc”的意思、由来-开放百科全书

Spiradisc (often misspelled as "Spiradisk") was a copy protection scheme used by Sierra On-Line on their floppy disk releases for the Apple II.

The technique, developed by Mark Duchaineau, involved writing the data on spiralling paths on the disk rather than in concentric circles. Initially, no commercial copying software or bit nibbler could successfully copy the disks it was applied to.^[1]^[2]^[3]

Games which used Spiradisc copy protection include Lunar Leepers,^[4] Frogger,^[3] Ultima II,^[1] Star Maze,^[5] Jawbreaker,^[6] and Maze Craze Construction Set.

Eventually, Copy II Plus version 5, was able to successfully defeat this copy protection.

References

1. ^¹{{cite book |last1=Levy |first1=Steven |title=Hackers: Heroes of the Computer Revolution (25th Anniversary Edition) |pages=326–332 |chapter=Chapter 19: Applefest |year=2010 |publisher=O'Reilly Media |isbn=978-1449388393}}
2. ^{{cite journal |last1=McFadden |first1=M. M. |title=Antique Softkey for Frogger|journal=Computist |issue=41 |pages=28–29 |publisher=SoftKey Publishing |url=https://archive.org/details/computist-scan-41 |year=1987}}
3. ^¹{{cite journal |last1=Jones |first1=Bruce W. |title=Spiradisk Info|journal=Hardcore Computist |issue=25 |pages=4 |publisher=SoftKey Publishing |url=https://archive.org/details/computist-scan-25 |year=1985}}
4. ^{{cite journal |last1=Etarip |first1=Rich |title=Softkey for Lunar Leepers |journal=Computist |issue=83 |pages=10–11 |publisher=SoftKey Publishing |url=https://archive.org/details/computist-scan-83 |year=1990}}
5. ^{{cite journal |last1=Etarip |first1=Rich |title=Softkey for Star Maze |journal=Computist |issue=84 |pages=15–16 |publisher=SoftKey Publishing |url=https://archive.org/details/computist-scan-84 |year=1990}}
6. ^{{cite journal |last1=Etarip |first1=Rich |title=Softkey for Jawbreaker |journal=Computist |issue=82 |pages=16 |publisher=SoftKey Publishing |url=https://archive.org/details/computist-scan-82 |year=1990}}

References

External links