50M50
The Tektronix 50M50 is a Programmable Memory card with 16K byte and one 16-bit or two 8-bit I/O ports for the MI5010 .
It can be used as a waveform generator with the 50M20 D/A Card, as a waveform digitizer with the 50M10 A/D card, or as a generic digital word generator and/or data acquisition buffer.