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| Possible Atmel GAL programmer http://forum.6502.org/viewtopic.php?f=10&t=5590 |
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| Author: | TomC [ Thu Mar 28, 2019 8:46 pm ] |
| Post subject: | Possible Atmel GAL programmer |
I just stumbled onto this website, which purports to offer a homebrew programmer for Atmel's 16v8 and 22v10 chips: http://www.bhabbott.net.nz/atfblast.html You need a computer with a parallel port; maybe he'll upgrade it to use USB at some point. |
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| Author: | drogon [ Thu Mar 28, 2019 9:56 pm ] |
| Post subject: | Re: Possible Atmel GAL programmer |
TomC wrote: I just stumbled onto this website, which purports to offer a homebrew programmer for Atmel's 16v8 and 22v10 chips: http://www.bhabbott.net.nz/atfblast.html You need a computer with a parallel port; maybe he'll upgrade it to use USB at some point. I found that recently, however the real "trick" is knowing the algorithm - the hardware is relatively easy to hook up to e.g. an ATmega (arduino), so it ought to be possible to write the burning code for the ATmega, download the file into it (2K ram - plenty of space) then get it to burn the GAL. That's my plan, anyway. -Gordon |
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| Author: | whartung [ Thu Mar 28, 2019 11:12 pm ] |
| Post subject: | Re: Possible Atmel GAL programmer |
What makes these difficult to program? Wacky voltage requirement? Secret undocumented incantations? |
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| Author: | DerTrueForce [ Thu Mar 28, 2019 11:34 pm ] |
| Post subject: | Re: Possible Atmel GAL programmer |
They use a serial programming algorithm that isn't publicly documented by Atmel/Microchip, and for some reason, it's not available on cheap programmers. People have reverse-engineered it, though. |
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| Author: | GARTHWILSON [ Thu Mar 28, 2019 11:45 pm ] |
| Post subject: | Re: Possible Atmel GAL programmer |
DerTrueForce wrote: They use a serial programming algorithm that isn't publicly documented by Atmel/Microchip, and for some reason, it's not available on cheap programmers. People have reverse-engineered it, though. I would use their parts if the information were available. Do you have a link to the reverse-engineered algorithm? |
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| Author: | DerTrueForce [ Fri Mar 29, 2019 1:50 am ] |
| Post subject: | Re: Possible Atmel GAL programmer |
I do, but not on this device. I've posted it before, though. I'll take a look and see if I can find it again. EDIT: Here you are: https://www.ecstaticlyrics.com/electronics/ATF22V10C/ |
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| Author: | GARTHWILSON [ Fri Mar 29, 2019 2:05 am ] |
| Post subject: | Re: Possible Atmel GAL programmer |
Thanks. I just now printed it. |
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