====== Shugart SA850/851 ======

  * OEM Manual: https://bitsavers.org/pdf/shugart/SA8xx/39017-0_SA850_851_OEM_Manual_Nov80.pdf
    * Jumpering information is on pages 29-44.
  * Service Manual: https://bitsavers.org/pdf/shugart/SA8xx/39018-0_SA850_851_Service_Manual_Dec80.pdf

=== Specifications ===

^                           ^  Single Density           ^  Double Density  ^
^ Capacity Unformatted      | 0.8 MiB                   | 1.6 MiB          |
^ Capacity Formatted (IBM Format, 128-byte sectors)         | 0.5 MiB                   | 1.0 MiB          |
^ Heads                     | 2                         | 2                |
^ Tracks                    | 77                        | 77               |
^ Track density             | 48 tpi                    | 48 tpi           |
^ Record method             | FM                        | MFM/M2FM         |
^ Rotational Speed          | 360 rpm                   | 360 rpm          |
^ Latency (avg.)            | 83 ms                     | 83 ms            |
^ Average Access Time       | 91 ms                     | 91 ms            |
^ Track to track            | 3 ms                      | 3 ms             |
^ Settle time               | 15 ms                     | 15 ms            |
^ Transfer Rate             | 250 Kib/s                 | 500 Kib/s        |
^ Head Load Time            | 50 ms                     | 50 ms            |

(Specifications from OEM Manual - November 1980)