OS-9 Device Descriptor and Configuration Module Reference

Low-Level System Configuration Module (cnfgdata)max_notifiersMAX_NOTIFIERS1EditMod Labels2-configuration data6-notification services data structure1-maximum number of registered notifiersDescriptionUsed by the notification services module to indicate the maximumnumber of notification routines that can be registered.Port Generic Default Value0 (zero)Port Specific Override ValueRefer to ROM/CNFGDATA/config.des (Figure 1-3).Available Values0 to 4294967295. While the only adverse effect of defining a largermax_notifiers value than necessary is the extra memory used forthe unused records, here are some considerations to help determine anacceptable value:• Notification services are required by any module that needs to knowwhen the systems are in transition from polled mode to interruptmode. Essentially this means the low-level serial and ethernetdrivers (including iovcons).• A module generally only installs one notification routine, but if asingle module is used for two ports (like io16550 on Powerstacksand PCs), it installs two.OS-9 Device Descriptor and Configuration Module Reference 97