turtle@sdsu.UUCP (Andrew Scherpbier) (04/14/88)
I have a Zenith-386 box with a Zenith-449 EGA graphics card running Xenix 2.2.2 I want to start writing device drivers for xenix, so I typed in the sample device driver for a Memory-Mapped Video Driver. However, when I tried to link it into the kernel, there were two unresolved externals: _mmudescr and _dscralloc I need those routines to address physical memory locations. Is this sample device driver only for 286 boxes? Does the 386 use different ways of getting absolute memory? (ie: go through the page tables by hand) In general, NOW WHAT? Replies are greatly appreciated! -Andrew ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~T~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "I sometimes get the feeling that | Andrew Scherpbier things cannot possibly get worse...| Computer Science Department and sure enough, they do." | San Diego State University -Don Perkins Jr. | ihnp4!jack!sdsu!turtle