HOW do you handle multiboot ? with OS3.9/MOS/OS4 ???

[keropi]

what EXACLTY do I modify on my KickLayout-A4000 file, so OS4 knows that it's partition is OS4:  :-?  :-?  :-?

[keropi]

noone?  :-o

[a1200freak]

In sys:kickstart/kicklayout search for BootDevice. Remove the ";" at the beginning. Then in a shell type echo > kickstart/BootDevice "dh1" where dh1 is the OS4 boot partition.

[keropi]

thanks! will try it later!

also, does the OS4 boot partition need to be in the first 2GB of the HD (like the 3.9 needs?)

[motorollin]

[EDIT]
Nevermind, just re-read the post and realised I had misread it.
[/EDIT]

--
moto

[TetiSoft]

@keropi

> also, does the OS4 boot partition need to be in the first
> 2GB of the HD (like the 3.9 needs?)

When you are talking about a boot partition on an IDE drive
attached to the internal IDE port, then yes, the kickstart
ROM version of the IDE scsi.device is limited to 4GB, any
boot partition for any OS must be located completely inside
this limit as long as this device is used. Eventually its
even 2GB, dont remember ATM.

[keropi]

damnit... I must re-arrange my disk then!

[Crumb]

The partition must be in the first 4GB.

[TheGoose]

I hope this works, 3rd times a charm. I'm having a time getting OS4C installed, think I got my boot partitions under 4GB now, so hope that works. I'm using the A1200 IDE port.

 :rtfm:


I don't think they mention this (4GB stuff) in the install guide...


minutes later....

It's is now booting properly! Yeah! less than 4GB is the trick.

[pc_amiga]

INTRO
I've posted this elsewhere in case this is deja vu by reading this.  I've read through the posts but don't think I have seen anybody with this experience...

BACKGROUND
I have a Kickflash card in my A4000T with 3.1 ROMS and I saved the OS3.9 kickstart modules into flash.  I have OS4 installed on 1 partition and OS3.9 on the other...I have used the OS4 kickstart layout file to tell kickstart which is my OS4 partition.

ISSUE
1) When cold booting and I *disable* kickflash from loading, the IDE HDD just hangs (light stays on for a long time and then goes off and the screen stays blank).  Here it looks like it is a 3.1 cold boot issue.

2) When cold booting and I enable the kickflash, the computer boots up normally until it starts loading the classic OS4 kickstart modules from the IDE hard drive. After the screen turns purple, I can see that during the os4 reboot the kickflash trys to loads its own 3.9 stuff (blue) and then I see purple (infinite loop of reseting)...only way to get out of it is to disable the kickflash at that point. It gets out of the loop and then I get a 80000007 guru and then it boots up nicely....
Basically, I think the OS3.9 scsi.device that is loaded from the kickflash fixes some OS3.1 IDE issues to allow the Amiga A4000T to boot with this IDE hard drive that I have....

HOW TO SOLVE?
I tried both Coyote options of "if Kickflash shall only be actived if Kickstart v3.1 is installed or if the programs in the flash memory shall be started regardless of the kickstart version." but didn't seem correct/change anything.

Right now I do not have any OS4 components installed in kickflash...but would like to know if any has done this for OS4 i.e. is there a way to create a dual boot similar what the docs say about the the OS3.x/1.x for 4.x/3.x.