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98 Enhanced OS-9 for X86 PCAT

Installing and Configuring Enhanced OS-9

It is usually best to create the initial boot image to not use /h0. /dd

should be set for RAM disk. This will allow downloading the TAR

images. Next setup the final boot image and select /h0 if as initial device

name.

Descriptors

Refer to IDE Descriptors for information on descriptor naming

conventions. The descriptors for RB1003 are located in

MWOS/OS9000/80386/PORTS/PCAT/CMDS/BOOTOBJS/DESC/RB1

003. Also the RB1003 driver is located in

MWOS/OS9000/80386/PORTS/PCAT/CMDS/BOOTOBJS.

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

Find the following sections:

#define IDE_CIS_PARAMS "ide0=0x320,0 ide1=0x360,0"

#define PCMCIA_IDE_PRIMARY_PARAMS_PORT"port=0x320 timeout=30 altstat=0xe"

#define PCMCIA_IDE_SECONDARY_PARAMS_PORT"port=0x360 timeout=30 altstat=0xe"

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

#define PCMCIA_IDE_PRIMARY_PARAMS_PORT"port=0x320 timeout=0 altstat=0xe"

#define PCMCIA_IDE_SECONDARY_PARAMS_PORT"port=0x360 timeout=0 altstat=0xe"

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

should wait up to 30 seconds.

#define PCMCIA_IDE_PRIMARY_PARAMS_PORT"port=0x320 timeout=5 altstat=0xe"

#define PCMCIA_IDE_SECONDARY_PARAMS_PORT"port=0x360 timeout=2 altstat=0xe"

To explain the definition of IDE_CIS_PARAMS in detail: "ide0=0x320,5

ide1=0x360,0" indicates that IDE0 (socket 0) has a base address of

0x320 and uses IRQ 5, while IDE1 (socket 1) has a base address of

0x360 and uses no interrupt.

Advanced notes

Some embedded systems support 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

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Adaptec 1542CP - Storage Controller Fast SCSI 10 MBps Guida Utente Pagina 98