nop_cmd_struct
volatile struct nop_cmd_struct *nop_cmds[2];
volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
ptr = (char *) ptr + sizeof(struct nop_cmd_struct);