User guide

90 Enhanced OS-9 for X86 PCAT

Installing and Configuring Enhanced OS-9

ds_timeout = 30;

#endif

};

NoteNote

Since OS-9 does not require the BIOS to use IDE it is possible on some

systems to use IDE without interrupts. Keep in mind that on some

systems disabling the IDE from the BIOS also disables the IDE

controller as well.

Drive time-out may also fail on drives that are extremely old. If you are

having problems using drives that are less than 540MB you may want

to disable the time-out. This can be done by setting time-out value to

zero in config.des and re-making the descriptors and boot image.

Using IDE in PCI mode (Advanced - Optional)

Support is included to support IDE devices as PCI specific devices. PCI

based IDE support is not automatic and may not work on some PCI

bridges. The rb1003 driver must be re-made with the following changes

to the makefile.

PCILIB = -l=$(PORT)/LIB/pcilib.l

LIB = $(PICLIB) $(PCILIB) \

$(CPULIB) $(CLIB) $(P2LIB) $(OS_LIB) $(SYS)

SPEC_COPTS = -a -c -r -t=0 -bepg -dNEWINFO $(PICISR) $(IRQMASK) \

-dPCI

In this case we have added PCILIB as well as defined PCI in the

SPEC_COPTS section. On some systems that use both primary and

secondary controllers that allow level interrupt to be set and used in PCI

standard method, you can save one interrupt vector. You must also set