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AuthorTopic: Pin 1 A1200 hd interface  (Read 962 times)

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Offline scuzzb494

Pin 1 A1200 hd interface
« on: February 04, 2021, 05:58:28 PM »
Hi

Pin 1 is missing from one of my A1200 hd interfaces on the motherboard. The computer has missing shielding and also has the ribbon and power connectors for a 3.5" drive. I have a feeling this was often done when using certain types of drives. Not sure to be honest. I don't think the missing pin is a break I think its deliberate. What are your thoughts. Also will a 2.5" drive work without the missing pin.

Many thanks.

Offline TribbleSmasher

Re: Pin 1 A1200 hd interface
« Reply #1 on: February 04, 2021, 06:49:25 PM »
Pin 1 is Reset signal. not sure it is required for operation, tho.
 

Offline kolla

Re: Pin 1 A1200 hd interface
« Reply #2 on: February 05, 2021, 04:46:52 AM »
With pin 1 in place, every time you do a system reboot, the disk will also do a reset and spin down and back up again. Since it used to be a common problem that disks would not spin back up fast enough before the A600/A1200 gave up waiting, it was common to cut pin 1 to prevent the disk from spinning down at all on reset. I typically did this by cutting pin on the cable.
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