meta data for this page
  •  

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Last revisionBoth sides next revision
platforms:sirius_v9k [2022/02/16 02:48] – [Applesauce Support] pdevineplatforms:sirius_v9k [2022/02/16 02:51] – [Applesauce Support] pdevine
Line 17: Line 17:
 The Victor 9000 stores data in an usual manner. The disks have a variable number of sectors per track, utilize a constant linear velocity, and spin at different speeds in various zones on the disk. The disks encode data using a Group Coded Recording [GCR] format that's an evolution of that used in the Commodore 64. The tracks on the first and second side do not spin at the same rate. The computer organizes the tracks logically with 0-79 on the first side and then tracks 80-159 on the second. This differs from many other computers which interleave tracks between side one and two.  The Victor 9000 stores data in an usual manner. The disks have a variable number of sectors per track, utilize a constant linear velocity, and spin at different speeds in various zones on the disk. The disks encode data using a Group Coded Recording [GCR] format that's an evolution of that used in the Commodore 64. The tracks on the first and second side do not spin at the same rate. The computer organizes the tracks logically with 0-79 on the first side and then tracks 80-159 on the second. This differs from many other computers which interleave tracks between side one and two. 
  
 +**Zone Table**
 ^    ZONE NUMBER   ^    LOWER HEAD TRACKS ^ UPPER HEAD TRACKS ^ SECTORS PER TRACK  ^   ROTATIONAL PERIOD (MS)  ^  RPM ^ ^    ZONE NUMBER   ^    LOWER HEAD TRACKS ^ UPPER HEAD TRACKS ^ SECTORS PER TRACK  ^   ROTATIONAL PERIOD (MS)  ^  RPM ^
 |    0             |          0-3         |        unused     |         19         |            237.9          |    252| |    0             |          0-3         |        unused     |         19         |            237.9          |    252|
Line 31: Line 32:
  
  
-GCR+**GCR Table**
  
 ^ Input Hex ^ IO Encoded Binary ^ IO Encoded Hex ^ ^ Input Hex ^ IO Encoded Binary ^ IO Encoded Hex ^