Powering an IDE cdrom for A1200

Discussion:

(too old to reply)

a***@gmail.com

2008-10-06 13:00:59 UTC

I have managed to get myself a nice working A1200 with an internal HD
and exapnded memory. I have got myself an IDE cable that will allow
me to connect an IDE cdrom at the same time as the hard drive however
I cannot power the cdrom! What is the best way to do this?

I have an old ATX power supply sitting around but it doesnt supply any
power as it needs to be connected to an ATX motherboard. Is there a
way around this? Or is there a standard power supply I can buy?

I saw 5.25" caddies but they wont allow me to fit the IDE cable as far
as I can tell...

Thanks
Allan

Clocky

2008-10-06 23:19:00 UTC

Permalink

Post by a***@gmail.com
I have managed to get myself a nice working A1200 with an internal HD
and exapnded memory. I have got myself an IDE cable that will allow
me to connect an IDE cdrom at the same time as the hard drive however
I cannot power the cdrom! What is the best way to do this?
I have an old ATX power supply sitting around but it doesnt supply any
power as it needs to be connected to an ATX motherboard. Is there a
way around this? Or is there a standard power supply I can buy?

There is a very easy way around this, but just be aware that the supply is
also load dependant and a CD-ROM may not be enough to kick it into action.
You can try, just connect the green wire (terminal 14, PS/ON) at the ATX
connector to ground. I looped terminal 14 (PS/ON) to terminal 15 (GND) using
a jumper.

I use an ATX supply to power all my Commodore peripherals.

a***@gmail.com

2008-10-07 07:45:21 UTC

Permalink

Post by Clocky

There is a very easy way around this, but just be aware that the supply is
also load dependant and a CD-ROM may not be enough to kick it into action.
You can try, just connect the green wire (terminal 14, PS/ON) at the ATX
connector to ground. I looped terminal 14 (PS/ON) to terminal 15 (GND) using
a jumper.
I use an ATX supply to power all my Commodore peripherals.

Thanks that worked - is it easy to use the ATX to power the whole
Amiga?

I now need a 2.5" to 2x3.5" IDE cable, hopefully eBay will be my
answer!

Thanks
Allan

Clocky

2008-10-07 23:31:42 UTC

Permalink

Post by Clocky

There is a very easy way around this, but just be aware that the supply is
also load dependant and a CD-ROM may not be enough to kick it into action.
You can try, just connect the green wire (terminal 14, PS/ON) at the ATX
connector to ground. I looped terminal 14 (PS/ON) to terminal 15 (GND) using
a jumper.
I use an ATX supply to power all my Commodore peripherals.

Thanks that worked - is it easy to use the ATX to power the whole
Amiga?

Yep, look here.

http://eab.abime.net/showpost.php?p=337268

The stock A1200 supply is really only good for a stock A1200 application so
if you plan to do some modifications and upgrades using an ATX supply is the
way to go.

a***@gmail.com

2008-10-09 08:52:55 UTC

Permalink

Post by a***@gmail.com

Post by Clocky

There is a very easy way around this, but just be aware that the supply is
also load dependant and a CD-ROM may not be enough to kick it into action.
You can try, just connect the green wire (terminal 14, PS/ON) at the ATX
connector to ground. I looped terminal 14 (PS/ON) to terminal 15 (GND) using
a jumper.
I use an ATX supply to power all my Commodore peripherals.

Thanks that worked - is it easy to use the ATX to power the whole
Amiga?
Yep, look here.
http://eab.abime.net/showpost.php?p=337268
The stock A1200 supply is really only good for a stock A1200 application so
if you plan to do some modifications and upgrades using an ATX supply is the
way to go.

Cheers. I will have a go at this at the weekend. At the moment I
have everything connected (IDE cdrom and HD) however I cannot access
the cdrom. I tried to install AmiCDROM from aminet but it says it
cant mound scsi.device 1. Is there anything else I should do? Or
something completely different?

Cheers
Allan

Clocky

2008-10-09 12:07:19 UTC

Permalink

Post by a***@gmail.com

Post by Clocky

There is a very easy way around this, but just be aware that the supply is
also load dependant and a CD-ROM may not be enough to kick it into action.
You can try, just connect the green wire (terminal 14, PS/ON) at the ATX
connector to ground. I looped terminal 14 (PS/ON) to terminal 15 (GND) using
a jumper.
I use an ATX supply to power all my Commodore peripherals.

Thanks that worked - is it easy to use the ATX to power the whole
Amiga?
Yep, look here.
http://eab.abime.net/showpost.php?p=337268
The stock A1200 supply is really only good for a stock A1200 application so
if you plan to do some modifications and upgrades using an ATX supply is the
way to go.

Make sure the master/slave/CS configuration is correct on the HDD/CD-ROM.
I've had mixed results with different drives on the Amiga and I can't
remember specifically what I did to get things working on my A500 (with my
selfmade IDE interface, so possibly not relevant anyway) so perhaps someone
else can better answer that question in regards to the best driver options.

zipper

2008-10-10 19:13:05 UTC

Permalink

You have to use newer than OS 3.1 to be able to use scsi.device with
CD-Rom. Try with Idefix97 package from Aminet to get working
atapi.device.

a***@gmail.com

2008-10-13 08:43:22 UTC

Permalink

Post by zipper

You have to use newer than OS 3.1 to be able to use scsi.device with
CD-Rom. Try with Idefix97 package from Aminet to get working
atapi.device.

I am getting somewhere! The IdeFix97 has been able to detect my cdrom
and it detects CD-DA discs! However it doesnt seem to detect when any
data discs are inserted. Do you know how I can solve this?

Thanks
Allan

Robert Roland

2008-10-07 13:21:44 UTC

Permalink

There is power available in the IDE connector. Not 12V, though, which
you will need for a normal 5.25" drive.

If you can get your hands on a laptop type drive, they only need 5V,
which is available on the IDE connector. You will need to solder a
wire bridge to get power to the right pins, but it works. These drives
have a 44-pin connector, where the additional four are for power
supply. Grab the cable too if you get a drive from a desktop computer.

These small drives have also been used on desktop computers. I got
mine from a discarded Compaq SFF (Small Form Factor). Some
rack-mounted servers also use them.

As an added bonus, the small drive can actually be installed into the
A1200.

--
RoRo

Clocky

2008-10-07 23:27:30 UTC

Permalink

Post by Robert Roland

There is power available in the IDE connector. Not 12V, though, which
you will need for a normal 5.25" drive.
If you can get your hands on a laptop type drive, they only need 5V,
which is available on the IDE connector. You will need to solder a
wire bridge to get power to the right pins, but it works. These drives
have a 44-pin connector, where the additional four are for power
supply. Grab the cable too if you get a drive from a desktop computer.
These small drives have also been used on desktop computers. I got
mine from a discarded Compaq SFF (Small Form Factor). Some
rack-mounted servers also use them.
As an added bonus, the small drive can actually be installed into the
A1200.

You will need a better power supply then a stock A1200 one if you have
anything much above and beyond a stock configuration. An A500 supply is an
improvement but an ATX supply would be ideal.