Compucolor II disk - Revision history

Dan Tobias: /* Documentation */

2019-07-14T14:15:05Z

‎Documentation

Dan Tobias: /* Documentation */

2019-07-14T06:10:42Z

‎Documentation

Dan Tobias at 06:08, 14 July 2019

2019-07-14T06:08:41Z

Dan Tobias at 05:00, 10 July 2019

2019-07-10T05:00:19Z

Dan Tobias at 20:37, 19 January 2013

2013-01-19T20:37:22Z

Dan Tobias at 15:43, 25 December 2012

2012-12-25T15:43:30Z

Dan Tobias at 14:59, 25 December 2012

2012-12-25T14:59:47Z

Dan Tobias at 14:59, 25 December 2012

2012-12-25T14:59:18Z

Dan Tobias: Created page with "{{FormatInfo |formattype=physical |subcat=Floppy disk |released=1978 }} The '''Compucolor II''' computer came standard with a 5.25" disk drive, built into its TV-based monito..."

2012-12-25T14:58:26Z

Created page with "{{FormatInfo |formattype=physical |subcat=Floppy disk |released=1978 }} The '''Compucolor II''' computer came standard with a 5.25" disk drive, built into its TV-based monito..."

New page

{{FormatInfo
|formattype=physical
|subcat=Floppy disk
|released=1978
}}

The '''Compucolor II''' computer came standard with a 5.25" disk drive, built into its TV-based monitor. (The earlier Compucolor I had used an [[8-track tape]] for data storage.)

The disk format was single-sided (but disks could be flipped), with 40 tracks and 48tpi density. It had an average access time of 400 ms and latency of 200 ms, with transfer rate 76.8 kilobits/sec. Formatted capacity was 51.2 kilobytes per side.

== Documentation ==
* [http://oldcomputers.net/Compucolor-II-Maintenance-Manual.pdf Maintenance manual: has some technical info]

[[Category:Compucolor computers]]

@@ Line 6: / Line 6: @@
 The '''Compucolor II''' computer came standard with a 5.25" disk drive, built into its TV-based monitor. (The earlier Compucolor I had used an [[8-Track]] tape for data storage.)
-The disk format was single-sided (but disks could be flipped), with 40 tracks and 48tpi density. It had an average access time of 400 ms and latency of 200 ms, with transfer rate 76.8 kilobits/sec. Formatted capacity was 51.2 kilobytes per side.
+The disk format was single-sided (but disks could be flipped), with 40 tracks with 10 sectors each (storing 128 bytes per sector) and 48tpi density. It had an average access time of 400 ms and latency of 200 ms, with transfer rate 76.8 kilobits/sec. Formatted capacity was 51.2 kilobytes per side.
-The [[Compucolor filesystem]] was implemented the same way in the disk-based systems as the earlier tape-based ones, so it treated the disk as if it were a tape, moving all subsequent files backward to fill the space when a file was deleted.
+The [[Compucolor file system]] was implemented the same way in the disk-based systems as the earlier tape-based ones, so it treated the disk as if it were a tape, moving all subsequent files backward to fill the space when a file was deleted.
 According to the podcast linked below, the CompuColor disk drive based its writing speed on the exact details of the electric current coming into it, which could vary between different CompuColor machines and even in the same one over time, making it an iffy proposition to read disks from somebody else or from a long time earlier.

@@ Line 9: / Line 9: @@
 The disk format was single-sided (but disks could be flipped), with 40 tracks and 48tpi density. It had an average access time of 400 ms and latency of 200 ms, with transfer rate 76.8 kilobits/sec. Formatted capacity was 51.2 kilobytes per side.
-The Compucolor II filesystem was implemented the same way in the disk-based systems as the earlier tape-based ones, so it treated the disk as if it were a tape, moving all subsequent files backward to fill the space when a file was deleted.
+The [[Compucolor filesystem]] was implemented the same way in the disk-based systems as the earlier tape-based ones, so it treated the disk as if it were a tape, moving all subsequent files backward to fill the space when a file was deleted.
 == Documentation ==

← Older revision		Revision as of 15:43, 25 December 2012
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	The disk format was single-sided (but disks could be flipped), with 40 tracks and 48tpi density. It had an average access time of 400 ms and latency of 200 ms, with transfer rate 76.8 kilobits/sec. Formatted capacity was 51.2 kilobytes per side.		The disk format was single-sided (but disks could be flipped), with 40 tracks and 48tpi density. It had an average access time of 400 ms and latency of 200 ms, with transfer rate 76.8 kilobits/sec. Formatted capacity was 51.2 kilobytes per side.
		+
		+	The Compucolor II filesystem was implemented the same way in the disk-based systems as the earlier tape-based ones, so it treated the disk as if it were a tape, moving all subsequent files backward to fill the space when a file was deleted.

	== Documentation ==		== Documentation ==

@@ Line 5: / Line 5: @@
 }}
-The '''Compucolor II''' computer came standard with a 5.25" disk drive, built into its TV-based monitor. (The earlier Compucolor I had used an [[8-track]] tape for data storage.)
+The '''Compucolor II''' computer came standard with a 5.25" disk drive, built into its TV-based monitor. (The earlier Compucolor I had used an [[8-Track]] tape for data storage.)
 The disk format was single-sided (but disks could be flipped), with 40 tracks and 48tpi density. It had an average access time of 400 ms and latency of 200 ms, with transfer rate 76.8 kilobits/sec. Formatted capacity was 51.2 kilobytes per side.

@@ Line 14: / Line 14: @@
 == Documentation ==
 * [http://www.compucolor.org/tech.html Compucolor tech info]
 * [http://oldcomputers.net/Compucolor-II-Maintenance-Manual.pdf Maintenance manual: has some technical info]
 * [http://hwcdn.libsyn.com/p/f/6/a/f6a6a4b982ed5bf8/24FloppyDays_2014_10_CompuColor_II.mp3?c_id=7705784&cs_id=7705784&destination_id=130236&expiration=1562739129&hwt=569547820ce5546973f753473357fce9 Podcast about CompuColor]
 [[Category:Compucolor computers]]