RT @arielmtspeaks@twitter.com

Anyone who knows rare add-ons for #vintagecomputers, can you point me to the manual for this? It's a Mountain Computer part number 05-04031-02 that came in a HDD-less IBM 5160 (PC-XT) I rescued. I can't tell if it's an MFM, RLL, or ESDI controller or what the jumpers do.

🐦🔗: https://twitter.com/arielmtspeaks/status/1510764167342424065