The Infrared Camera and Spectrograph (IRCS)(1) a facility instrument for the 8.2m Subaru Telescope is being built at the University of Hawaii, Institute for Astronomy. IRCS will use a 1024x1024 InSb array for spectroscopy and another 1024x1024 InSb array for infrared imaging. In a collaborative effort with the team members of SpeX(2) tan IRTF multi-array facility instrument), a test system has been fabricated for joint testing of 1024x1024 InSb ALADDIN II based arrays. This document is a preliminary report on the test system and initial test results of the science grade array provided by the Subaru Telescope Project. It is a possible candidate for inclusion in IRCS.