IOP

#include <iop.h>

typedef struct _IOP {
    ULONG IOP_physical;        // physical address of IOP
    ULONG IOP_physical_dcb;    // address of physical DCB
    ULONG IOP_original_dcb;    // address of DCB designated by IOR
    USHORT IOP_timer;          // Request Control Block (RCB) current 
                               //   timeout value
    USHORT IOP_timer_orig;     // original timeout value
    ULONG IOP_calldown_ptr;    // address of next calldown routine
    ULONG IOP_callback_ptr;    // address of current callback address
    ULONG IOP_voltrk_private;  // for use by volume tracking
    ULONG IOP_Thread_Handle;   // handle of thread originating 
                               //   the I/O request
    ULONG IOP_VM_Handle        // handle of the Volume Manager
                               //   originating the I/O request. 
                               //   Initialized in
                               //   <k>IOS_SendCommand</k>.
    ULONG IOP_srb;             // used by SCSI'izers to pass SRB 
                               //   address to next layer
    ULONG IOP_reserved[2];     // reserved; must be zero
    IOP_callback_entry IOP_callback_table[IOP_CALLBACK_TABLE_DEPTH];
                               // RCB_CallBackTable
    BYTE  IOP_format_head;     // low level format data
    BYTE  IOP_format_xfer_rate;     
    USHORT IOP_format_track; 
    ULONG IOP_format_num_sectors;
    IOR IOP_ior;               // I/O request descriptor
} IOP, *pIOP;

Contains information about an I/O request.

See also IOR