Hello,
As many people are probably aware, there is a problem with some "bad" DMA chips in some of the earlier ST/STE/Mega-STE computers, which can cause problem when using devices like the UltraSatan.
With that in mind, I had a couple of questions:
1) Is there a way - via software - to determine whether the DMA chip in one's Atari is a good one or a bad one? Could someone who knows programming (and the ST hardware) come up with some kind of test that lets the user know whether they have a bad chip? Or does one have no option but to physically open the Atari up and remove the floppy drive to see the chip number printed on the IC?
2) If someone has a bad DMA chip and they want to replace it, how difficult is this to do? Is the DMA socketed, or do you have to de-solder all the pins individually?
Thanks!
As many people are probably aware, there is a problem with some "bad" DMA chips in some of the earlier ST/STE/Mega-STE computers, which can cause problem when using devices like the UltraSatan.
With that in mind, I had a couple of questions:
1) Is there a way - via software - to determine whether the DMA chip in one's Atari is a good one or a bad one? Could someone who knows programming (and the ST hardware) come up with some kind of test that lets the user know whether they have a bad chip? Or does one have no option but to physically open the Atari up and remove the floppy drive to see the chip number printed on the IC?
2) If someone has a bad DMA chip and they want to replace it, how difficult is this to do? Is the DMA socketed, or do you have to de-solder all the pins individually?
Thanks!