Amiga 500 Expansion slot switch

08 March 2015, 04:18

Hello

This is my first post and I have searched the forums for something similar but have had no luck.
I have an A500 here that I want to connect my A590 to but it has a strange switch on the side expansion slot.

The switch is connected to pins 28 and 31, and holding it in seems to just stop the floppy drive. Is there any reason someone has modified the Amiga for this?
Board is Rev 6A, and I would like to connect my A590, do the 1mb chip ram mod, and possibly install kickstart 3.1. At the moment this switch is in the way.

I got this Amiga and 100s of floppies years ago from a friend who did not want it. It has sat in a box with my other two Amiga 500's collecting dust.

whitegiant89 · 08 March 2015, 05:49

not sure, mayby a cpu pause button

Jope · 08 March 2015, 07:26

Yes, this is a halt switch.

A toggle switch I can understand, it gives you an easy pause switch, but if it's a push button I'm not sure what practical purpose it would serve.

Zippy Zapp · 08 March 2015, 17:08

Yeah, weird and why not to the back of the connector so it can still be used? Well nothing a soldering iron can't fix...

09 March 2015, 13:32

Thanks for the replies. I think I will just remove it completely. Hopefully underneath it hasn't damaged anything so the A590 still connects properly.

Jope · 09 March 2015, 13:42

You can use some solder sucking wick to clean the edge connector.

08 March 2015, 04:18	#1
HR186S Posts: n/a	Amiga 500 Expansion slot switch Hello This is my first post and I have searched the forums for something similar but have had no luck. I have an A500 here that I want to connect my A590 to but it has a strange switch on the side expansion slot. The switch is connected to pins 28 and 31, and holding it in seems to just stop the floppy drive. Is there any reason someone has modified the Amiga for this? Board is Rev 6A, and I would like to connect my A590, do the 1mb chip ram mod, and possibly install kickstart 3.1. At the moment this switch is in the way. I got this Amiga and 100s of floppies years ago from a friend who did not want it. It has sat in a box with my other two Amiga 500's collecting dust. Attached Thumbnails

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08 March 2015, 05:49	#2
whitegiant89 Lone CBM user Join Date: Mar 2007 Location: Atherton / Australia Age: 52 Posts: 148	not sure, mayby a cpu pause button

08 March 2015, 07:26	#3
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,861	Yes, this is a halt switch. A toggle switch I can understand, it gives you an easy pause switch, but if it's a push button I'm not sure what practical purpose it would serve.

08 March 2015, 17:08	#4
Zippy Zapp Registered User Join Date: Sep 2013 Location: CA/USA Posts: 346	Yeah, weird and why not to the back of the connector so it can still be used? Well nothing a soldering iron can't fix...

09 March 2015, 13:32	#5
HR186S Posts: n/a	Thanks for the replies. I think I will just remove it completely. Hopefully underneath it hasn't damaged anything so the A590 still connects properly.

09 March 2015, 13:42	#6
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,861	You can use some solder sucking wick to clean the edge connector.

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