Thanks Grant. I look forward to that.
I found this quote for "text" file:
You can send text files as an alternative to keyboard input using Send Text File. This is useful, for example, when you need to send a string of keyboard input to a remote computer for troubleshooting purposes, or need to send a lengthy keyboard input string as part of a connection sequence to a remote computer or router.
I still suspect the loader was not right.
I seem to have two major gaps of knowledge for the Altair: the protocol around using the IO ports, and the use of the sense switches. Can you recommend any manuals for these two knowledge gaps?
Paul