Hi. I have installed OS3.9 and OS4 in 2 different (of course) partitions but i don't know how to set them to work in a dual boot system. The early startup menu doesn't do the trick. I have tried either OS4 with priority 0 and OS3.9 with priority 1, or the opposite but still the same result, black screen after reboot while trying to boot in the other partition . I have surely done sth wrong or less. Is there any way to resolve this problem and have these 2 different OS's run flawlessly in my system? Do i have to fiddle with the startup seq and if yes how?

Forgot to mention that i have am A1200 (bppc, bvision, 160 ram internal cd, hd.....)

Last edited by portarinos on 19-Jan-2009 at 05:57 PM.

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@portarinos

You have to select the boot source in the esm after every reset needed during the boot of OS3.9 or 4.0.

@ZeroG
I have stated that using the early menu doesn't work for me as it produces a black screen after reboot and it freezes. I suppose it's sth that has to do with the initial configuration of the partitions through media toolbox or similar

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@portarinos

Ok, lets say your OS3.9 partition has pri 1 and OS4 has pri 0.
You enter the esm and select to boot OS4.
OS4 now installs the ppc kickstart and resets.
That reset undo what you selected in the esm the first time and the os4 kickstart will try (and fail) to boot from your Os3.9 partition because it has a higher pri than the os4 partition.

If your Os4 partition has pri 1 and os3 pri 0, the os3.9 kickstart-patch will do the reset and it will try (and fail) to boot from your OS4 partition, because the reset undo what you selected in the esm the first time.

having had an os4 beta tester at my home setting up a dual boot system for me.

all i can tell you at the moment is that you have to have os3.9 as your first partion HD0
as i requires a double boot up,
set its priority to 4
os 4 is on your 2nd partion DH0 priority 3

then you have to create a text file,

ECHO DH0 >ram:BootDevice
go into your ram drawer and put this file into your os4 sys kickstart folder

now edit your kicklayout1200 file
uncomment the MODULES kickstart/BootDevice line

switch off for 15secs enter your ess menu select your os4 partion then boot
as soon as your screen turns turns from pink to black hold both mouse buttons down again to re enter ess you should now see a new os4 ess screen
select os4 partion again and boot,

with luck you should have os4 booted up

hope this helps you,
i cant tell you anymore info at present as i am waiting for him to come round again.

Last edited by twizzle on 19-Jan-2009 at 08:04 PM.

@twizzle

no need of any "boot selector" thing with classic.

Listen what ZeroG suggested, its plain and simple.

AOS4 bootpri=4
AOS3.9 bootpri=1
MOS bootpri=3

The system boots directly to AOS4

If you need to boot AOS3.9 from AOS4, press "CTRL ALT ALT" and you will achieve a cold/full reboot.

Enter in the esm and select the AOS3.9 partition and reboot

leave to boot until the first reboot (by SetPatch) and enter again in the esm selecting again the AOS3.9 partition and boot.

You will get AmigaOS3.9

Last edited by Framiga on 08-Feb-2009 at 01:59 PM.
Last edited by Framiga on 19-Jan-2009 at 08:13 PM.

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@Framiga

according to my os4 friend, os 4 classic needs to know what boot partion to boot from otherwise you end up with a blank screen ,as it does not know where to load its files from?

Last edited by twizzle on 19-Jan-2009 at 08:57 PM.

As already stated:

When AOS4 is set as partition with the highest priority you should boot into AOS4 flawlessly.

But you must disable the kickstart mapping within the PPC-Setup-Menu (at least on A4000)!

Bye

@Reth

correct,
but if you still want to have os 3.5/3.9 then you must have this as your first partion

as stated above, os 3.5/3.9 requires a 2nd reboot. this is the simplest solution for a dual booting system.

i have spent hours & days pulling my hair out trying to solve this problem with my 1200t

thats why i had to call for help, and within 2 hrs he had my dual booting sys up and running
he first installed os 4 classic on my 2nd partion then created the text file, uncommented the modules line done a few more edits,
then installed os 3.1 +3.5 onto my 1st partion, heypresto

@all

Thanx for your answers but i' m still a little bit puzzled. I mean that i have already thought about some things but may occur but i would like to know how other amiga users have coped with the same problem. I can only come to the conclusion that you have to play around with ESM, good timing and successful reboots. I can't understand the thing about screen changing colours (from pink to sth else) cause i simply don't see any changes. I use a Belinea TFT monitor and the only thing that makes me understand when the system reboots is a small flashing light on the power button. From a couple of answers i have figured out the following as an acceptable solution to a dual boot solution:

AOS4 bootpri=4
AOS3.9 bootpri=1


1)I have to boot first in OS4
2)Then press "CTRL ALT ALT" to achieve a cold/full reboot
3)Early Startup menu and select the AOS3.9 partition
4)Reboot
5)Boot until the first reboot
6)Enter again in the ESM
7)Select again the AOS3.9 partition and boot.
8)Finally, OS 3.9

This seems a very straightforward solution but i'll have to test it first.

A couple of thing i haven't understood clearly:

After the first entrance in the ESM do i reboot with Ctrl - Amiga - Amiga or just select the Boot option? (Step 4)
And another one. How can i understand when the first reboot occurs? (Step 5). Does anything flash or sth else?
Thanx again.

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@twizzle

Quote:

as stated above, os 3.5/3.9 requires a 2nd reboot

Only the first time (at least for me). But the same goes for AOS4.

Maybe I'll check my Kicklayout and Bootdevice related stuff in order to give some more information (have some trouble booting into AOS4 since 2 days).

Bye

@Reth

Thanx i'll be waiting for further info

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Vanilla A500
NOS A1200 (Powered by V1200, CoffinOS r.58)
PowerMac beast, MorphOS 3.15 (registered)

@Reth

Quote:

Reth wrote: @twizzle Quote: as stated above, os 3.5/3.9 requires a 2nd reboot Only the first time (at least for me). But the same goes for AOS4. Maybe I'll check my Kicklayout and Bootdevice related stuff in order to give some more information (have some trouble booting into AOS4 since 2 days). Bye

if you are in AmigaOS3.9 and you want to boot in AOS4, simply use a hard/cold reset tool and you will go straight to AOS4 (having AOS4 the higher priority)

i use this http://aminet.net/util/misc/AbcsAmigaReset.lha but there are plenty on Aminet

Last edited by Framiga on 20-Jan-2009 at 04:02 PM.

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@portarinos

"AOS4 bootpri=4
AOS3.9 bootpri=1


1)I have to boot first in OS4
2)Then press "CTRL ALT ALT" to achieve a cold/full reboot
3)Early Startup menu and select the AOS3.9 partition
4)Reboot
5)Boot until the first reboot
6)Enter again in the ESM
7)Select again the AOS3.9 partition and boot.
8)Finally, OS 3.9"

correct!

"After the first entrance in the ESM do i reboot with Ctrl - Amiga - Amiga or just select the Boot option?"

only select the Boot button in ESM.

About the point 1 ... theres no need to boot in AmigaOS4 if you need to boot directly in AOS3.9 after switchingON the system.

Enter immediately in the ESM after you switch-ON the system and follow points 3-4-5-6-7

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@Framiga

Thanx a bunch. The trick worked like a charm. I now have my two beloved OS's installed and i must say that it was easier than i had thought. No need to play around with startup seqs and things like that. I had done exactly the same steps except that i was missing the second reboot. Thanx Framiga and all!!

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Vanilla A500
NOS A1200 (Powered by V1200, CoffinOS r.58)
PowerMac beast, MorphOS 3.15 (registered)

@portarinos

glad you got it sorted

@portarinos

your wellcome

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