Amiga.org
Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Johan Samuelsson on January 02, 2008, 04:16:25 AM
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I have an A1200 with a Blizzard 1260, and I want to install a level 7 interrupt button, bur how?
Can anyone help out or link to a tutorial?
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And why would a sweet innocent musician such as yourself, want such a button? :-)
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Obviously, to be able to push it. :lol:
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68060 datasheet. (http://amiga.serveftp.net/Datasheets/MC68060_datasheet.pdf) This might help, especially page 8-12. Certainly more useful than the last two comments.
And why would a sweet innocent musician such as yourself, want such a button?
for this reason (http://www.amiga.org/forums/showthread.php?t=33462), kn****ad!
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@spotUP
Doing some Amiga bending?
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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.. Considering price and availability of machines today I would hope people would be doing less hardware projects to keep the machines as readily available as possible.
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Yeah, too right! Everyone: STOP having fun with your Amigas! Put them back in their boxes and keep them preserved for future generations!
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moto
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DonnyEMU wrote:
Considering the lack of A1200's available and out there in general supply. Why would anyone be experimenting with a machine like this.. Considering price and availability of machines today I would hope people would be doing less hardware projects to keep the machines as readily available as possible.
Ummmm, no.
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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?
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I'm gonna make my dream of a house sided with new old stock, pearly white Amiga's come true this night! Of course, I'll remove any leaky batteries as necessary.
:crazy:
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@spot
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
Considering the lack of A1200's available and out there in general supply. Why would anyone be experimenting with a machine like this
AmigaKit (http://www.amigakit.com) 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!
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You have to be nuts if your thinking of circuit bending anything 'Amiga' in my opinion.
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isn't it possible to do this in software ? write a small program that generates a L7 interrupt at a special key combination ? and put it in wbstartup or something ?
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a software version is useless.
i want to activate hrtmon.
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Syntax Error hardware hacks :) (http://user.it.uu.se/~jesperw/se/amiga/lev7.shtml)
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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.
(http://user.it.uu.se/~jesperw/se/amiga/a-lev7_pic1.png)
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THANK YOU! JUST WHAT I NEEDED!!!
EDIT: L7 button installed and working =)
Amiga and Blizzard card is alive and doing better than ever!
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I would recommend a resistor in series with the switch. I don't know if the Paula lines are open colector or not. You might fry the lady.
Does anybody has this information ?
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A noob question:
What is a level 7 interrupt?
EDIT:
and what purpose would it serve in an Amiga?
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@Pyrre
68k Interrupts - Wikipedia (http://en.wikipedia.org/wiki/Motorola_68000#Interrupts)
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".
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I am not building a device.
Toni Wilen just made a romable version of HRTMon (a software Action Replay clone). I am burning my own kickstart with lots of fancy stuff on it, one of those is HRTMon. What better place to have it than in the kickstart? :D
No clunky devices for me.
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I am burning my own kickstart with lots of fancy stuff on it, one of those is HRTMon.
Would that mean, when you solder the lvl7 interrupt. And "push" the button. It will trigger the computer to pause. Like the Action replay device does. And with the HRTMon software inside the kickstart ROM chip. You basically have an action replay device in the ROM chip....
Did I get that right?
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pyrre: yes :)
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However, in fairness HRTmon doesn't include all the features Action Replay has: For example HRTmon doesn't track all the custom register writes, and thus is unable to restore the system state in some cases.
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I realize this was a long time ago - but does this work? Would love to build such a thing, any points on how to do so would be great.