Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!decwrl!sun!smile!alanf From: alanf%smile@Sun.COM (Alan Fargusson) Newsgroups: comp.os.minix Subject: BIOS disk driver Message-ID: <79151@sun.uucp> Date: 29 Nov 88 01:50:22 GMT Sender: news@sun.uucp Lines: 11 There is a problem with calling the ROM BIOS when you are using interrupts on the Z-248. The problem is that the BIOS switches to an internal stack which is very small. If an interrupt occurs during the call to the BIOS it is likely that this stack will overflow. There are other potential problems as well. I found this problem while debuging an interrupt driven serial port driver for MS-DOS. Older versions of the Zenith BIOS seem to work better. - - - - - - - - - - - - - - - - - - - - - Alan Fargusson Sun Microsystems alanf@sun.com ..!sun!alanf