The PAL family continued to evolve into the late 1980s, with faster, lower-power devices, including ones that could be reprogrammed. The most complex device type developed was probably the PAL22V10, ...
We have always had programmable analog circuits. Any circuit that makes outputs change as a function of inputs is in some way programmable. Examples include gain change as a function of voltage or ...
Implementing configurable I/O blocks on a microcontroller IC is by now an established practice. These blocks in the past have been implemented either as register-configured fixed logic or as an array ...