I am glad to share the schematics for Navy Seal’s Cartridge, which I have put together using the work available at c64-wiki.de as a baseline.
Essentially this is a very similar configuration as Terminator 2’s but with two EPROM footprints that can accommodate either 32-pin (e.g. a 27C010) or 28-pin chips.
The 128kB 28-pin EPROM used by Navy Seals is apparently quite difficult to source: the difference with standard 28-pin EPROMs is that this one has A16 on pin 22, rather than /OE (Output Enable). This is definitely a quite flexible PCB design I’ve not seen photographed anywhere else so far 🙂
Those interested in buying a DC2N4-LC because they didn’t get a chance to do so in the past, and those who would like to own a spare device for disaster scenarios, will be glad to know that the DC2N4-LC PCBs were posted by the factory that manufactured them!
Stay tuned for the announcement when devices will be for sale!