Grandpa!
I found the grandpa of my actual computers, and yours probably: the Datapoint 2200 Terminal.
This terminal was in fact a full blown micro-computer, based not on a microchip but on a hundred TTL modules that executes 8bits instructions. These instructions were the same on the Intel 8008 that is binary compatible: they where contractors but couldn’t meet the deadline of Datapoint, they keep the chip and released it later.
The ISA of the Intel 8008, and the 1971 Datapoint 2200 is the same that we have on our x86 computers these days, extended in many ways, but still keeping same basic instruction set: this datapoint 2200 is the ancestor of my 64bit MacBook Pro, and if Intel have cope with deadline, first 8bit micro-computer with a microchip should have been this “terminal”.
Many companies program it to do classical computation instead using it as a terminal, and with up to 16KB and 2 x 130KB tape drive, in 1972, it was a kinda powerful computer. Remember that ‘79 IBM PC-XT shipped with 16KB RAM too, but only one tape entry!