Texas Instruments TMS2532 - 1979 Vintage; EPROM - used in #1ESS switch from Western Electric. For those not familiar the #1ESS was used as a local switch in the Bell System later
Eprom-Switch
Kit doppia EPROM DUAL MAP Peugeot 206 16V ECU 1AP e 1AF (115) | eBay
Eprom-Switch
Eprom Switcher. Come crearlo e scoprire il funzionamento - Nicola Reat