The TESTCFG device driver provides services for automatic detection of Original Equipment Manufacturer (OEM) hardware interfaces. Functions provided by this driver are accessed entirely by opening the device name TESTCFG$ and using the following Category 80h IOCtls. 
┌──────────┬──────────────────────────────────────────────────┐
│Function  │Description                                       │
├──────────┼──────────────────────────────────────────────────┤
│40H       │Get Copy of BIOS/Adapter Memory                   │
├──────────┼──────────────────────────────────────────────────┤
│41H       │Issue an "IN" I/O Instruction                     │
├──────────┼──────────────────────────────────────────────────┤
│42H       │Issue an "OUT" I/O Instruction                    │
├──────────┼──────────────────────────────────────────────────┤
│60H       │Get Bus Architecture Function                     │
├──────────┼──────────────────────────────────────────────────┤
│61H       │Return All POS IDs                                │
├──────────┼──────────────────────────────────────────────────┤
│62H       │Return All EISA IDs                               │
└──────────┴──────────────────────────────────────────────────┘

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