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Cloning a PAL/HAL (Part 7)


25k Member
Jan 11, 2007
Pacific Northwest, USA
To see Part 6, click here

To go to Part 1, click here

Finally, you program the GAL with your programmer. For this one, I used an inexpensive programmer, the Chinese TOP853. These are sold on eBay, and if you're patient, you can pick one up for about $25, shipped. Mine worked right out of the box.

It's a good idea to erase the GAL before programming, even if it's brand-new. A random sampling shows quite a few with some fuses blown.

So, did it work? Well, this was a copy of a PAL on the video card in an AT&T 6300. Mine had no PAL because the previous owner wanted to use a VGA card of his own. Since you can't remove the native display card, pulling the PAL is a good way to disable it. Just make sure that you don't lose the PAL!.

And, yes it works. Below is the 6300 driving a VGA LCD display:

Next, on to a more complex part, the PAL16L8, in part 8.


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