AMIDIAG (ver 4.06a) Abandonware AMIDIAG is a comprehensive computer diagnostics utility intended for use on an older 486 or prior vintage computer. Its major advantage over newer DOS all-in-one diagnostics is that it can (and should) run without a memory manager. Although not able to recognize some of the newest hardware (be selective, as some tests might "hang"), it can still provide many useful troubleshooting tests, particularly in the case of the memory chip tests.