What's the story with FPGA based Gate Arrays?

[salvogendut]

I was reading some old forum posts about the scarcity of GA chips when I actually searched for them on Ebay and found something like this:

GA replacement

What are these things? Who makes them ? Why are they so expensive?

[Brocky]

https://www.vretrodesign.com/products/vr40010-amstrad-cpc-gate-array-replacement
dunno if they work tho...

theres a site you can order NOS 40007 and 40010s....they only have 4 40007s left...but over 100 40010s
https://www.icompplus.com/en/shop?search=40010

[salvogendut]

Thanks @Brocky they seem only slightly less expensive than the ones on Ebay but I guess it's not easy to make them. I can see the schematics and everything is published on github at https://github.com/codedchip/AMSGateArray. The Xilinx CPLD by itself is like 10 Euros , perhaps another 2 euros for the PCB if made in large quantities and I think 15 Euros should be enough to cover the expenses. So I guess those are fair prices on the website you provided