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Creative Computers CD-ROM, Volume 1 (Legendary Design Technologies, Inc.)(1994).iso
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turbo2000-pal_switch
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1994-11-17
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T U R B O - H S T
~~~~~~~~~~~~~~~~~
Have you ever dreamed of getting a better CPS rate with
your HST? Well, if you follow the following advice
and you have a Fatter Agnus, then we are in business...
Boot your Amiga in NTSC mode, then use a pal software switch to put it in
PAL mode. DO NOT boot directly in PAL or this WON'T work.
Then, use a good Zmodem term like AZComm or AmiTerm, and voilà!
You can easily achieve upto 2000CPS if you own a 14.4HST.
Of course, the BBS you're calling must have booted his system
in the same manner. SO SPREAD THIS FAR AND WIDE!!!!!!!
>>> I URGE ALL SYSOPS TO USE THIS TRICK!! <<<
If you don't own a Fatter Agnus, get one! It's truly worth it!
Also, here are the A500 and A2000 specs to install a hardware PAL/NTSC
switch. (much more convenient for booting directly in a video mode)
NTSC/PAL HARDWARE SWITCH FOR A500
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
For this, you need the Fatter Agnus (part #8372). If you haven't yet
changed the jumper JP2, you will need to do the following:
- Between the ROM and the CPU is the JP2 jumper;
you will need to switch the solder from 1-2 to 2-3, this
is to indicate the A500 that you now have the new Agnus
installed.
Now, take the Agnus chip out of its socket.
Next step is to put a little adhesive paper on pin 41 of the Fatter Agnus
socket, and to solder a SMALL wire to pin 41 of your Fatter Agnus chip.
Be careful when soldering on the Fatter Agnus, it is VERY heat sensitive,
so do not leave your soldering iron in contact with the chip too long, ie
more than 2 secs.
Take your time, and blow on it (from time to time) to cool it down.
Then you can install it back in the socket.
Now, take a ON/OFF switch. On the 1st leg, you connect a ground (which
can be taken from PIN 1 of the 83 pin connector on the side), and on the
2nd leg you connect the wire from the Fatter Agnus.
If the switch is in the OPEN position (OFF), you will be booting in PAL.
If the switch is in the CLOSED position (ON), you will be booting in NTSC.
You need to reset after switching to enable the mode.
Technical stuff:
~~~~~~~~~~~~~~~~
- Pin 41 (TEST) of the chip connects to ground, and by preventing it to do
so by interfering in the connection, you get a 50hz signal. If pin 41
touches the socket, ie connect to ground, you get a 60hz signal. Which
translates in getting PAL (50hz) or NTSC (60hz).
Problems:
~~~~~~~~~
- If your computer does not even come up to the 'WB hand', and stays with a
grey screen, check the JP2 jumper. If you did switch the JP2, and it stays
grey, pop out and back in your chip, it may be some pins that don't
connect.
- If your computer boots, but does not go in PAL mode, even if the wire
doesn't touch the GND (or your switch is in the OFF position), it may be
that the little adhesive paper moved, and pin 41 of the chip touches pin 41
of the socket.
- If you boot green, it is your Fatter Agnus that isn't placed right. Pop
it out and back in, or just push it out a bit, that should do the trick.
There is no easier way to do this, I tried hunting for a jumper or bubble
of some kind, and have cut many traces, and this is the easiest way I found
of doing it. Have fun!
NTSC/PAL HARDWARE SWITCH FOR A2000
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A. You MUST have the new 1 Meg Agnus (Super Agnus part #8372)
B. Move motherboard jumper J300 from the factory default position
of pins 1-2 to pins 2-3.
C. Locate jumper PADS (no pins) labeled J102 and cut the trace
between the 2 pads. BE CAREFUL!!
D. Mount a switch in a convient place on the outside of hte Amiga,
Perhaps next to the power on LED.
E. Run the 2 wires from the switch to the 2 pads of J102 (1 wire to
each pad).
That's it. With the switch closed (on position), you'll boot in
NTSC. With the switch in the open position (off), you'll boot in
PAL.
++49-211-733 8332