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A project log for Tatung Einstein Speculator analysis

It is a board that lets the Einstein computer emulate the Spectrum. Design by Tony Brewer.

keithKeith 09/24/2025 at 13:070 Comments

Lee Bendall wishes to make 15 kits, so he has ordered 15 buzzers and 30 ATF16V8 chips from China. The latter are coming to me for programming. These were chosen because they are reprogrammable, so if the kits don't sell then they can re-used for something else.

Everything else is common TTL, passives, and connectors. I think I have many spare 74LS74 chips etc. in my junk box.

2025-10-07

RAM chips, buzzers and GAL16V8 chips arrived. The latter in a non-ESD-safe plastic bag surrounded by bubble wrap. The eBay vendors in China are not engineers, that's for sure! I hope there are not many bent pins in there.

I have ordered some conductive foam for storing chips safely.

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