4 OS in 1 system

Thanks to your help…

After some hours spent to install Windows 98(osr1), Windows 2000proSP1,
Linux (Corel SE) and QNX RTP, I have installed only W98, w2000 and QNX.

IDE (PCI) controller card #1 slot: Windows 98
IDE primary slot on motherboard : QNX
IDE secondafy slot on motherboard : Windows 2000

I can not have a boot system for the 3 OS.
I have to select the boot sequence in the bios (SCSI for win98 or win2000,
as the boot menu is on the w98 disk / C for QNX).

I dont know how to modify the QNX boot system to be able to select QNX, W98,
W2000.

When I press ESC to get alternate OS, QNX goes on booting. No way to access
w98 or w2000 from QNX initialisation sequence (may be there’s not. If
someone knows, thanks for the help)

thanks again

I’ve made my own boot manager. It’s a final option for you maybe, but I like
it.

Just make a switch on your computer which selects which harddisk to get
power. Connect the power-supply of you pc to the switch, the switch should
have 4 options, leading to the power-connectors of your 4 harddisks. Now, if
you select 1, the first harddisk will get power. If this is for instance
your secundairy master harddisk, then your computer will boot this OS. If
it’s the primary master, it will run that one. If it’s the SCSI0, it will
run that. If it’s the SCSI1, it will run that.

I made it when I knew nothing about MBR’s and so, and I wanted to be
save…VERY SAVE, with my windows OS, because I had some very important
stuff on that disk. I didn’t want to ruin my documents.

It’s very save, saver then any other solution. It’s 30min of soldering the
plugs and it’s ready.

HS

This option was discussed early in the thread, its NOT safe you are just lucky!
The reason that it is not safe is that for cmos ircuits it can be very bad to have
the inputs or output active without the vcc being asserted. There is an intrinsic
diode between the inputs and vcc ( its part of the esd protection). If the inputs are driven, you could lose that input due to high current draw though it.

Check any data sheet for most cmos chips and you will see a warning about this issue, if you don’t check any textbook that cover cmos circuit design.

What was posted early is that there is 2 drive select wires, look up the ide spec
I forget the exact wires, and just switch those


Previously, Het Studentje wrote in comp.os.qnx:
{ I’ve made my own boot manager. It’s a final option for you maybe, but I like
{ it.
{
{ Just make a switch on your computer which selects which harddisk to get
{ power. Connect the power-supply of you pc to the switch, the switch should
{ have 4 options, leading to the power-connectors of your 4 harddisks. Now, if
{ you select 1, the first harddisk will get power. If this is for instance
{ your secundairy master harddisk, then your computer will boot this OS. If
{ it’s the primary master, it will run that one. If it’s the SCSI0, it will
{ run that. If it’s the SCSI1, it will run that.

or just is the scsi bios to disable the drives

{
{ I made it when I knew nothing about MBR’s and so, and I wanted to be
{ save…VERY SAVE, with my windows OS, because I had some very important
{ stuff on that disk. I didn’t want to ruin my documents.

a better solution is removible hard drive trays, that is much safer

{
{ It’s very save, saver then any other solution. It’s 30min of soldering the
{ plugs and it’s ready.

NO IT’S NOT THAT SAFE, YOU ARE JUST LUCKY

{
{ HS
{
{
{


Pat Ford email: pford@qnx.com
QNX Software Systems, Ltd. WWW: http://www.qnx.com
(613) 591-0931 (voice) mail: 175 Terence Matthews
(613) 591-3579 (fax) Kanata, Ontario, Canada K2M 1W8