User guide

1
Installing and Configuring Enhanced OS-9
Enhanced OS-9 for X86 PCAT 109
NoteNote
The SCRIPTS RAM support is currently only available on OS9000 X86
based systems. Requires non translation of PCI memory. To use
SCRIPTS RAM support include the "-dSCRIPTS_RAM" in the compile
line when making the driver.
Instruction prefetch is not enabled by default. Maximum burst rate and
large fifo’s are enabled.
By default the Microware Symbios driver will use the PCI I/O model. To
speed up transfers, especially on X86, platforms the memory module
may be used. In the PCI memory mode no in/out instructions are used.
For the X86 platform this removes the CPU related waits added by the
use of "inc", "outc" etc. If the user desires to run the driver in PCI
Memory mode the driver may be recompiled with the
"-dPCI_IO_MAPPED" flag removed from the
MWOS/OS9000/80386/PORTS/PCAT/SCSI/SCSI8XX/makefile
IO_MAPPED = -dPCI_IO_MAPPED
To use memory model change to:
IO_MAPPED = # -dPCI_IO_MAPPED
NoteNote
We have changed to default to IO_MAPPED for X86 due to problems
on PCAT based motherboards.
Prior to this release the following Symbios devices were supported:
Number of devices supported (2)
DEVICEWIDEULTRA1ULTRA2FIFO_SIZEBURST