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DOSputin/P2K-Disk-Architecture.md

Last active April 29, 2021 15:15
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SCI Prophet 2000 Disk Architecture Notes
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P2K-Disk-Architecture.md

SCI Prophet 2000 Disk Architecture

Two different types of floppy disks exist for Prophet 2000 samplers:

  • Single sided disks with a total theoretical capacity of 430 080 bytes (420K)

    • These disks are only used on early 256K Prophet 2000 samplers
    • Upgraded 512K and 1MB Prophet 2000 and Prophet 2002 samplers can read these disks also
    • The actual usable capacity is 399 616 bytes

  • Double sided disks with a total theoretical capacity of 860 160 bytes (840K)

    • These are the native disks used in 512K and 1MB Prophet units
    • The first side of these disks can be read and written by 256K Prophet units also
    • The actual usable capacity is 800 000 bytes The disks consist of

  • One or two sides, depending on the Prophet 2000 (numbered 0 and 1 by convention)

  • 80 tracks per side (numbered 0 to 79 by convention)

  • On each track 5 sectors of 1024 bytes (numbered 0 to 4 by convention) followed by 1 sector of 256 bytes (numbered 5 by convention)

@mogrifier
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Any info on how the data for samples is laid out on the disk?

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