The IM-PD1 image provides a set of registers specifically for the IM-PD1 card. The registers are called LM registers to preserve code compatibility with previous Integrator implementations that used a logic module to support the IM-PD1. Only the display interface controls in the LM_CONTROL register are functional. The LED, switches, and interrupt control registers are non-functional.

Table 8.16 shows the mapping of the LM registers in the Integrator/CM922T-XA10 and IM-PD1 implementation.