====== 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)