Twiggy floppy - Revision history

Dan Tobias: /* Links */

2023-01-27T21:47:23Z

‎Links

VolodyA! V Anarhist: /* Links */ no reason to go through google

2015-04-18T19:43:38Z

‎Links: no reason to go through google

Dan Tobias at 15:10, 14 September 2013

2013-09-14T15:10:53Z

Dan Tobias at 15:10, 14 September 2013

2013-09-14T15:10:27Z

Dan Tobias at 15:04, 14 September 2013

2013-09-14T15:04:37Z

Dan Tobias at 01:43, 4 May 2013

2013-05-04T01:43:16Z

Dan Tobias at 17:33, 7 April 2013

2013-04-07T17:33:37Z

Dan Tobias: Created page with "{{FormatInfo |formattype=physical |subcat=Floppy disk }} The '''Twiggy floppy''' (officially FileWare) was a nonstandard variety of 5.25" floppy disk used on the Apple Lisa c..."

2013-04-07T17:22:24Z

Created page with "{{FormatInfo |formattype=physical |subcat=Floppy disk }} The '''Twiggy floppy''' (officially FileWare) was a nonstandard variety of 5.25" floppy disk used on the Apple Lisa c..."

New page

{{FormatInfo
|formattype=physical
|subcat=Floppy disk
}}

The '''Twiggy floppy''' (officially FileWare) was a nonstandard variety of 5.25" floppy disk used on the Apple Lisa computer in the early 1980s. Apple originally had plans for release of drives for this format for the Apple II line and for the (then-upcoming) Macintosh, but ultimately went in the direction of 3.5" disks instead, leaving the Twiggy as an orphan format.

The Twiggy used media similar to the later 1.2 MB high-density disk format used on PCs, but with the casing holes arranged differently. It used a track pitch of 62.5 TPI, different from the common 48 and 96 TPI used in other formats. The drives were double-sided, and had a capacity of 871,424 bytes per disk. The speed varied from 218 to 320 RPM depending on which track was being read, allowing a near-constant amount of data per inch.

== Links ==
* [http://www.brouhaha.com/~eric/retrocomputing/lisa/twiggy.html Info on Twiggy floppy]
* [http://www.folklore.org/StoryView.py?story=Hide_Under_This_Desk.txt Anecdotal story]
* [http://www.google.com/url?q=http://www.1000bit.it/support/manuali/download.asp%3Fid%3D678&sa=U&ei=PKBhUbLXKIL09gSn_YCICw&ved=0CEkQFjAO&usg=AFQjCNFr3t9HH98w_gWgy3s77jo7NGBKQQ Apple patent on Twiggy drive]

@@ Line 17: / Line 17: @@
 * [http://www.1000bit.it/support/manuali/apple/lisa/LisaPatentTwiggy.pdf Apple patent on Twiggy drive]
 * [http://www.cultofmac.com/143458/rare-128k-mac-prototype-surfaces-with-5-25-floppy-disk-drive/ Rare prototype Mac with Twiggy drive]
 [[Category:Apple]]

@@ Line 15: / Line 15: @@
 * [http://www.brouhaha.com/~eric/retrocomputing/lisa/twiggy.html Info on Twiggy floppy]
 * [http://www.folklore.org/StoryView.py?story=Hide_Under_This_Desk.txt Anecdotal story]
-* [http://www.google.com/url?q=http://www.1000bit.it/support/manuali/download.asp%3Fid%3D678&sa=U&ei=PKBhUbLXKIL09gSn_YCICw&ved=0CEkQFjAO&usg=AFQjCNFr3t9HH98w_gWgy3s77jo7NGBKQQ Apple patent on Twiggy drive]
+* [http://www.1000bit.it/support/manuali/apple/lisa/LisaPatentTwiggy.pdf Apple patent on Twiggy drive]
 * [http://www.cultofmac.com/143458/rare-128k-mac-prototype-surfaces-with-5-25-floppy-disk-drive/ Rare prototype Mac with Twiggy drive]
 [[Category:Apple]]

@@ Line 9: / Line 9: @@
 The Twiggy used media similar to the later [[PC-DOS 1.2M format|1.2 MB high-density disk format]] used on PCs, but with the casing holes arranged differently. It used a track pitch of 62.5 TPI, different from the common 48 and 96 TPI used in other formats. The drives were double-sided, and had a capacity of 871,424 bytes per disk. The speed varied from 218 to 320 RPM depending on which track was being read, allowing a near-constant amount of data per inch.
-The disks had 1702 sectors storing 512 data bytes each (with 20 additional tag bytes per sector). Storage used [[GCR]] encoding.
+The disks had 1702 sectors storing 512 data bytes each (with 20 additional tag bytes per sector). Storage used [[GCR encoding]].
 == Links ==

← Older revision		Revision as of 01:43, 4 May 2013
Line 14:		Line 14:
	* [http://www.google.com/url?q=http://www.1000bit.it/support/manuali/download.asp%3Fid%3D678&sa=U&ei=PKBhUbLXKIL09gSn_YCICw&ved=0CEkQFjAO&usg=AFQjCNFr3t9HH98w_gWgy3s77jo7NGBKQQ Apple patent on Twiggy drive]		* [http://www.google.com/url?q=http://www.1000bit.it/support/manuali/download.asp%3Fid%3D678&sa=U&ei=PKBhUbLXKIL09gSn_YCICw&ved=0CEkQFjAO&usg=AFQjCNFr3t9HH98w_gWgy3s77jo7NGBKQQ Apple patent on Twiggy drive]
	* [http://www.cultofmac.com/143458/rare-128k-mac-prototype-surfaces-with-5-25-floppy-disk-drive/ Rare prototype Mac with Twiggy drive]		* [http://www.cultofmac.com/143458/rare-128k-mac-prototype-surfaces-with-5-25-floppy-disk-drive/ Rare prototype Mac with Twiggy drive]
		+
		+	[[Category:Apple]]

@@ Line 7: / Line 7: @@
 The '''Twiggy floppy''' (officially FileWare) was a nonstandard variety of 5.25" floppy disk used on the Apple Lisa computer in the early 1980s. Apple originally had plans for release of drives for this format for the Apple II line and for the (then-upcoming) Macintosh, but ultimately went in the direction of 3.5" disks instead, leaving the Twiggy as an orphan format.
-The Twiggy used media similar to the later 1.2 MB high-density disk format used on PCs, but with the casing holes arranged differently. It used a track pitch of 62.5 TPI, different from the common 48 and 96 TPI used in other formats. The drives were double-sided, and had a capacity of 871,424 bytes per disk. The speed varied from 218 to 320 RPM depending on which track was being read, allowing a near-constant amount of data per inch.
+The Twiggy used media similar to the later [[PC-DOS 1.2M format|1.2 MB high-density disk format]] used on PCs, but with the casing holes arranged differently. It used a track pitch of 62.5 TPI, different from the common 48 and 96 TPI used in other formats. The drives were double-sided, and had a capacity of 871,424 bytes per disk. The speed varied from 218 to 320 RPM depending on which track was being read, allowing a near-constant amount of data per inch.
 == Links ==

@@ Line 2: / Line 2: @@
 |formattype=physical
 |subcat=Floppy disk
 }}
@@ Line 12: / Line 13: @@
 * [http://www.folklore.org/StoryView.py?story=Hide_Under_This_Desk.txt Anecdotal story]
 * [http://www.google.com/url?q=http://www.1000bit.it/support/manuali/download.asp%3Fid%3D678&sa=U&ei=PKBhUbLXKIL09gSn_YCICw&ved=0CEkQFjAO&usg=AFQjCNFr3t9HH98w_gWgy3s77jo7NGBKQQ Apple patent on Twiggy drive]