You also had a Vbb of around -1.2V (?). Lines were typically terminated to this.
Dunno. But, it was fast and ate gobs of power. In the mid 70's I worked on a processor (i.e., what nowadays would be a CPU "chip") that drew 100A (MECL III and 10K). "Bus bars" for power were 3/4" square copper shafts. Instruction cycle time was 8ns. By comparison, I think a
7404 (inverter) takes *7* ns just to change the state of its output.If you "slipped" when pulling/installing a chip, the legs would vaporize before the power supply would even hiccup. (needless to say, you removed all jewelry -- belt buckles, eye glasses, rings, etc. -- when working on it)