Dan Tobias: Created page with "{{FormatInfo |formattype=electronic |subcat=Filesystem |released=1978 }} The '''Compucolor file system''' was used on Compucolor II disks, a 5 1/4" floppy disk format. Som..."

2019-07-14T14:11:24Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Filesystem |released=1978 }} The '''Compucolor file system''' was used on Compucolor II disks, a 5 1/4" floppy disk format. Som..."

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{{FormatInfo
|formattype=electronic
|subcat=Filesystem
|released=1978
}}
The '''Compucolor file system''' was used on [[Compucolor II disk]]s, a 5 1/4" floppy disk format. Some details of the format are documented in the "tech info" link below.

The program code that handled the file system was burned into [[ROM]] on the CompuColor computer, so it was fixed in structure and unable to be upgraded without hardware replacement.

Directory records started in sector 0 (sectors on the disk were numbered from 0 to 399), with the first directory sector containing the number of directory sectors (usually 3) and a disk volume label along with 5 directory entries; subsequent directory sectors had 6 directory entries. Filenames were 6 characters plus a 3 character extension/filetype. Sectors (directory and file content) were assigned sequentially, and file deletions required moving the remainder of the disk contents backward to preserve the contiguousness; this required memory buffering which used the display memory temporarily, causing odd screen displays while the operation was in progress. Saving a file multiple times resulted in multiple versions being saved, with sequential revision numbers.

== 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]]

Compucolor file system - Revision history

Dan Tobias: Created page with "{{FormatInfo |formattype=electronic |subcat=Filesystem |released=1978 }} The '''Compucolor file system''' was used on Compucolor II disks, a 5 1/4" floppy disk format. Som..."