Despite very well informed advice to the contrary; I've gone straight to the bottom of the market and bought the xgecu t48 (sometimes advertised as TL866II+ G3) as the cheapest eprom programmer that has a greater-than-zero chance of working for my use case
xgecu made a number of highly questionable design decisions on the t48 to hit a price point, and one of those decisions was to put the ZIF socket in upside down. I'm guessing that they couldn't route the traces and didn't want to pay extra for more layers.
What this means its that the 42 pin adapter for 27c160/322/400/800 from this awesome project
https://github.com/mafe72/27c160-tl866-adapter
does in theory still work, but in practise it's very difficult to mount the adapter on the device because the top of the adapter blocks the (stupidly placed) ZIF lever.
There is also an ongoing annoyance with the adapter that the DIP switch bank is incorrectly marked on the silk-screen, this is actually fixed in the most recent release. Its easy enough to invert the switch bank, but then the silkscreen shows 0 and 1 conflicting with the markings on the switch
Luckily the CADs are published as part of the repo here
https://github.com/mafe72/27c160-tl866-adapter
Cut a notch out to make room for the zif lever on the t48
Did a quick fix of the silkscreen. The DIP switch bank still needs to go on backwards, but now the silkscreen is backwards too so everything matches
Have not tested this, will post the CADs/gerbers when I've tested it and know that it works - if anyone has a burning desire to have them right now drop me a message and I'll send em.
xgecu made a number of highly questionable design decisions on the t48 to hit a price point, and one of those decisions was to put the ZIF socket in upside down. I'm guessing that they couldn't route the traces and didn't want to pay extra for more layers.
What this means its that the 42 pin adapter for 27c160/322/400/800 from this awesome project
https://github.com/mafe72/27c160-tl866-adapter
does in theory still work, but in practise it's very difficult to mount the adapter on the device because the top of the adapter blocks the (stupidly placed) ZIF lever.
There is also an ongoing annoyance with the adapter that the DIP switch bank is incorrectly marked on the silk-screen, this is actually fixed in the most recent release. Its easy enough to invert the switch bank, but then the silkscreen shows 0 and 1 conflicting with the markings on the switch
Luckily the CADs are published as part of the repo here
https://github.com/mafe72/27c160-tl866-adapter
Cut a notch out to make room for the zif lever on the t48
Did a quick fix of the silkscreen. The DIP switch bank still needs to go on backwards, but now the silkscreen is backwards too so everything matches
Have not tested this, will post the CADs/gerbers when I've tested it and know that it works - if anyone has a burning desire to have them right now drop me a message and I'll send em.
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