h6. [[FileCore]] h6(. » [[FileCore SWI Calls|SWI Calls]] h6((. » [[FileCore_DiscFormat]] h6(((. » Disc Format Block h2. Disc Format Block |_<^{width:4em}. Offset|_<^. Meaning| |>^. +0|<^. Sector size| |>^. +4|<^. Gap 1 side 0| |>^. +8|<^. Gap 1 side 1| |>^. +C|<^. Gap 3| |>^. +10|<^. Sectors per track| |>^. +11|<^. [[FileCore Disc Density|Density]]| |>^. +12|<^. "Options":#format_options| |>^. +13|<^. Start sector on a track| |>^. +14|<^. Sector interleave| |>^. +15|<^. Side/side sector skew (signed)| |>^. +16|<^. Track/track sector skew (signed)| |>^. +17|<^. Sector fill value| |>^. +18|<^. Number of tracks to format (ie cylinders/drive: usually 80)| |>^. +1C-23|<^. Reserved, must be 0| |>^. +24|<^. "Sector ID buffer":#sector_id (1 word/sector)| h4(#format_options). Format Options |_<^{width:4em}. Bit|_<^. Meaning| |<^. 0|<^. Index mark required| |<^. 1|<^. Double step| |/4<^. 2 - 3|<^. 0 = Interleaved side| |<^. 1 = Format side 1 only| |<^. 2 = Format side 2 only| |<^. 3 = Sequenced sides| |<^. 4 - 7|<^. Reserved, must be zero| h4(#sector_id). Sector ID Buffer |_<^{width:4em}. Bit|_<^. Meaning| |<^. 0 - 7|<^. Cylinder number mod 256| |<^. 8 - 15|<^. Head (0 onwards)| |<^. 16 - 23|<^. Sector number| |<^. 24 - 31|<^. Log2(sector size)-7| h4. See also * [[FileCore]] * [[FileCore_DiscFormat]]