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- From: 01ksdavis@bsu-ucs.uucp
- Newsgroups: alt.sys.amiga.demos
- Subject: Re: PAL switch methods
- Message-ID: <1992Sep2.091833.9162@bsu-ucs.uucp>
- Date: 2 Sep 92 14:18:33 GMT
- References: <92244.141822IO10781@MAINE.MAINE.EDU>
- Lines: 56
-
- In article <92244.141822IO10781@MAINE.MAINE.EDU>, IO10781@MAINE.MAINE.EDU (Even better than the real thing.) writes:
- >
- > Ok. Now this is all a little hazy, but I think we made the switch
- > like this:
- >
- > 1) Go out and buy, scrounge up, whatever a simple on/off switch, and
- > some fine wire. What guage you ask? No clue. Just get something
- > really fine. It has to fit into a small space.
- > 2) Now, open up your computer and expose the Agnus chip. (must be a
- > fatter or superfat Agnus)
- > 3) Use a tiny piece of plastic (I used a little piece of hardish
- > celophane packaging which didn't bend too badly) to isolate pin
- > #7 on the Agnus chip. Now. This is the hazy part. Which pin is
- > pin #7 I am not sure. All I can be sure of is that it's 7 pins
- > in from one of the corners. At least that'll limit your search
- > down to 8 tries at most.
- > 4) Anyway, after isolation, use the wire to connect the pin on the
- > Agnus to the switch and then to a ground. I used the drive casing
- > which is a ground for other things anyway. For ease of use, I bored
- > a hole in the bottom section of the casing right next to the drive
- > and stuck the switch through it. This way I can take the cover off
- > for susequent modifications without having wires holding the two
- > parts together.
- > 5) There you have it. I believe it boots in PAL when grounded and in
- > NTSC when not grounded. Maybe it's the other way. Anyhow, one try
- > will answer this question.
- >
- > I have an Amiga 500 with a revision 5 motherboard. I don't know how
- > this will work on a revision six or if there are any problems or
- > ambiguities at all. I've never seen a rev 6 anyhow. As for 2.04 ...
- > well, ... that's up to you to discover. At worst you'll just always
- > have to boot in NTSC but have a nifty little switch sticking out of
- > the casing. Tell everyone it's a panic button.
- > I hope this information helps. If not, well, tough luck I guess.
- > I did receive one piece of mail regarding my initial post about
- > a PAL/NTSC switch. Whomever it was (I forget) said not to bother
- > with a switch at all, since future Workbenches will support booting
- > in PAL or NTSC. The only thing is, how much are you willing to pay
- > and how long do you want to wait?
- > If anyone successfully instals a switch, please send me mail with
- > a decription of which pin #7 is. Thanks.
- >
- > .---------------.-------------------------------------------------------.
- > | ___________ | MST3000 * Monty Python * Ren&Stimpy * IRC * Erasure |
- > | (__ ., . ._) | Calvin & Hobbes * //\ * The Muppets * Duran Duran |
- > | ___) |\ | | | Douglas Adams * \X/--\migas * IO10781@Maine.maine.edu |
- > `---------------'-------------------------------------------------------'
- There are also software booters out there that will trick your system
- into thinking it is a PAL system. As far as I know, this works fine except for
- a slower execution speed. Utilities (as far as I can tell) are not affected.
-
- Some software booters (like the one I have) won't work an an Amiga 1000
- for some reason.
-
-
- Kyle
-