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Author Topic: How to solder a level 7 interrupt button into an A1200?  (Read 5906 times)

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Offline anakirob

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Re: How to solder a level 7 interrupt button into an A1200?
« on: January 02, 2008, 09:59:06 AM »
68060 datasheet. This might help, especially page 8-12. Certainly more useful than the last two comments.

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And why would a sweet innocent musician such as yourself, want such a button?
for this reason, kn****ad!

Offline anakirob

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Re: How to solder a level 7 interrupt button into an A1200?
« Reply #1 on: January 03, 2008, 02:59:15 AM »
@spot
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ouch... so i have to solder on my 1260?
i wouldn't wanna destroy that.
can i solder on the accelerator connector instead?


I would say so, although I'm hardly an electronics guru. I found an article in the september 1992 issue of CU Amiga where a pause switch can be fitted to an A500 in this manner, connecting the 68k's HLT pin to ground using the expansion port on the side.

I can send you a scan of this article if you think it may help. But I would think that triggering a Level 7 interrupt is a little more involved.

Hope this helps you in some way.

P.S. Google this for a list of pinouts - Amiga 1200 CPU Pinout

@The rest of you idiots

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Considering the lack of A1200's available and out there in general supply. Why would anyone be experimenting with a machine like this

AmigaKit seem to have a healthy supply of A1200's

And really guys, Spot asks a serious question and you insist on spamming this thread with (unfunny) humor. Shame on you all!

Offline anakirob

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Re: How to solder a level 7 interrupt button into an A1200?
« Reply #2 on: January 04, 2008, 12:04:49 AM »
Well done Nickman, that's exactly what spot wants!
And it's in swedish too. He will be pleased.

For those of us who don't speak swedish:



A1200
Solder a switch connecting pins 81, 82 & 83 of the expansion port (trapdoor) to Ground via 1N4148 diode.

This is very fiddly, unless you're an expert on the soldering iron you may like to get an electrician to do this for you.

A500
Solder a switch connecting pins 40, 42 & 44 of the expansion port (left hand side) to Ground via 1N4148 diode.


Offline anakirob

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Re: How to solder a level 7 interrupt button into an A1200?
« Reply #3 on: January 04, 2008, 03:24:18 AM »
@Pyrre
68k Interrupts - Wikipedia

It would serve to halt the system, even when the OS is not active. Useful for debugging code, cheating at games and ripping data.

This is how the Action Replay cartridge does its thing. I'm guessing Spot is planning to build such a device.

@Spot
When you complete your system monitor device, how about making details available so we can all have one. Unless you're planning on manufacturing and selling them. In which case "I want to buy one".