{If a MCR fault occurs in a task executing in a ring <= the value
{of this variable, Monitor will halt the CPU. The variable is located
{in Monitor and is intended to be used for debug only.

  VAR
    mtv$system_haltring: [XREF] 0 .. 255,
    mtv$halt_cpu_ring_number: [XREF] 0 .. 255;
