data_seg_a64
struct data_seg_a64 dataseg[COMMAND_SEG_A64]; /* 34-3F */
struct data_seg_a64 dataseg[CONTINUE_SEG_A64];
struct data_seg_a64 out_dsd; /* 10-1B */
struct data_seg_a64 in_dsd; /* 20-2B */
struct data_seg_a64 *cur_dsd;
cur_dsd = (struct data_seg_a64 *) & (cmd_entry->dataseg[0]);
(struct data_seg_a64 *)