Running RT11v4 on 11/03

Richard Cini rich.cini at
Fri Mar 4 20:57:44 CST 2016

All —

Now that I have a running 11/03 (through the Heathkit HT-11 I bought) I thought I’d try to get something running other than XXDP using the TU58 emulator. Malcolm Macleod has a quick walkthrough of how to make this work with an 11/23 and the TU58 emulator from Will Kranz (

Even though the tutorial is for the 11/23, I think that the 11/03 can run RT-11 from an RX01, and the H11 came with an optional custom version of RT-11, so I feel that it should theoretically work. I followed the tutorial and it reads the image but barfs at some point and the CPU halts. Not sure why. Has anyone tried this?


Rich Cini
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator

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