Weekend finds and help needed

This weekend was good for finding vintage HP items, but I'm looking for additional documentation and parts: 1. HP 9836C Picked up the CPU and monitor, but there were no manuals or media. The machine boots and displays: 9836C 2250A02013 Copyright 1982, Hewlett-Packard Company All Rights Reserved BOOTROM 3.0 Keyboard Color Graphics 2 Flexible Discs HP-IB HP 98628- at 20 917344 Bytes SEARCHING FOR A SYSTEM (ENTER to Pause) RESET To Power-Up At which point it hangs, presumably waiting for an operating system. Any leads on documentation, operating systems, and additional options for this computer would be most welcome. 2. HP 98241-67901 I/O Extender Appears to be for the 9825 series and has a test point for each of the interface lines. 3. HP ROM Drawers These were found loose in a parts bin and they appear to be ROM drawers for the HP 9825 series of desktop computers. I have three drawers, one with six slots (all of 'em empty) and two drawers with four slots. Each of the four-slot drawers has a single ROM labeled 98338A Assembly Execution 1 (the other slots are empty). Pictures can be found on my "Items Needing Help" web page at www.decodesystems.com/help-wanted/index.html . Again, any leads on documentation or additional ROMs for these drawers would be appreciated. Thanks! Cheers, Dan www.decodesystems.com