What are the really unusual or weird computers?

In article <759735.99156.qm at web61024.mail.yahoo.com>, Chris M <chrism3667 at yahoo.com> writes: I can tell you that software that talked to the system through MS-DOS and BIOS interrupts worked properly, but software that depended on entry points in the BIOS at specific addresses, or hardware located at specific addresses failed. In other words if you "stuck to the API", your application would run. If you "accessed the hardware directly", your application would most likely not run. I've got an Apricot "Microsoft Pack" manual sitting right here in front of me. It included MS-DOS, "various utilities" (edlin, etc.) and GW-BASIC. It *is* MS-DOS from Microsoft, not from someone else. It *isn't* an IBM PC compatible BIOS. I don't have any detailed specifications on how the hardware differed other than the BIOS. The earlier assertion that it was miles away party manufacturers worked just fine in all the configurations we sold at the store where I worked (the only Apricot dealer in Delaware). It was the software that was always the problem -- software that didn't go through the BIOS or MS-DOS software interrupts but instead accessed BIOS routines through specific addresses. -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>