Difference between revisions of "RL02 disk drive"

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{{Infobox Disk drive
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#Redirect [[RL0x disk drive]]
| name = RL02
 
| manufacturer = [[Digital Equipment Corporation]]
 
| controller = [[RL11 disk controller|RL11]] ([[UNIBUS]])
 
| capacity = 10.4 Mbytes (formatted)
 
| transfer rate = 512 Kbytes/sec<br>3.9 usec/word (peak)
 
| average access time = 67.5 msec
 
| rpm = 2400
 
| revolution time = 12.5 msec
 
| one track seek = 15 msec
 
| average seek = 55 msec
 
| maximum seek = 100 msec
 
| head switch = 8 msec (maximum)
 
| surfaces = 2
 
| tracks = 512
 
| sectors = 40
 
| words per sector = 128
 
| tracks per inch = 250
 
| density = 3725 bpi (maximum)
 
| recording method = [[Modified Frequency Modulation]] (MFM)
 
| start time = 40 seconds
 
| stop time = 30 seconds
 
| physical size = 19" W x 10-1/2" H x 25" L
 
| weight = 55 pounds
 
| power consumption = 160VA (running); 550 VA (starting, 10 seconds)
 
}}
 
 
 
[[Image:rl02drive.jpg|thumb|left|An RL02 drive]]
 
 
 
The RL02 is the high-density version of the [[RL01 disk drive|RL01]] [[disk|disk drive]], with twice as many tracks per surface, introduced in 1978 by [[Digital Equipment Corporation|DEC]].
 
 
 
The [[QBUS]] controllers are the [[RLV11]] and [[RLV12]], the latter being the [[QBUS|Q22]] version.
 
 
 
==4.3 BSD disktab==
 
<pre>
 
rb02|RB02|DEC RL02 on 730 IDC:\
 
    :ty=removable:se#256:ns#40:nt#2:nc#32:\
 
    :pa#15884:ba#4096:fa#1024:\
 
    :pb#4480:pc#20480:</pre>
 
 
 
==Emulating the RL02==
 
 
 
[[Image:Rl02.jpg|thumb|right|An RL02 cartridge]]
 
 
 
Reinhard Heuberger has created an open source emulator for the RL02 (and RL01) using a Terasic DE0-Nano Altera Cyclone IV FPGA board, extended with necessary interfacing hardware and an SD card slot. The emulator can be used with a real PDP-11, for example.
 
* [http://www.pdp11gy.com/doneE.html Home page of project]
 
* [http://www.vintage-computer.com/vcforum/album.php?albumid=184&attachmentid=12300 Picture of the simulator connected to a PDP-11/53]
 
 
 
[[Category: DEC Disk Drives]]
 

Latest revision as of 17:11, 30 December 2017

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