User guide

Installing and Configuring Enhanced OS-9

Enhanced OS-9 for X86 PCAT 93

ROM BOOTING

If changes to the IDE addresses of time-out values are employed, then

the ROM boot system may also require changes.

MWOS/OS9000/80386/PORTS/PCAT/ROM/cnfgdata.des

Fined the following sections:

#define IDE_PRIMARY_PARAMS_PORT"port=0x1f0 timeout=30"

#define IDE_SECONDARY_PARAMS_PORT"port=0x170 timeout=30"

To remove time-out for example we could change the above to:

#define IDE_PRIMARY_PARAMS_PORT"port=0x1f0 timeout=0"

#define IDE_SECONDARY_PARAMS_PORT"port=0x170 timeout=0"

Or we could make the time-out shorter. IDE specification indicates we

can wait up to 30 seconds.

#define IDE_PRIMARY_PARAMS_PORT"port=0x1f0 timeout=5"

#define IDE_SECONDARY_PARAMS_PORT"port=0x170 timeout=2"

Advanced notes

Some embedded systems include support for Compact Flash, which

looks like a standard IDE device. In these cases, we may decide that

RBF is the file system of choice, since we can boot the embedded

board with no other boot devices installed. How do we place the RBF

file system on such small embedded systems? Compact Flash devices

will work in PCMCIA systems with a carrier, so that we can use a

standard PC with PCMCIA support to build up the PCMCIA disk. Once

the disk is built, we can then remove the Compact Flash from the carrier

and place it in the target system for use.

PCMCIA IDE

Support for IDE based devices including standard PCMCIA IDE based

hard disk.

Benefits

• Supports large media(8.5GB maximum).

• PIO mode three supported.

• PC File system supported including long filenames (FAT32 is not

supported). Boot support (requires OS-9 coreboot load).