Or diode matrix ROMs were pretty popular as well.

Electrically, essentially what happens in most mask ROMs, but as a circuit board that allowed you to solder in a diode or not in each bit location in order to specify a 1 or a 0.

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cdcarter 2 days ago | parent [-]

That would be the "hardwired" option.

	▲	monocasa 2 days ago \| parent [-]
		Eh, it was considered user programmable and generally came blank from the vendor.