If you are the owner of an Altair 8800 Clone, I recommend Altair Clone Operator’s Manual as well as other resources on the Support page. In particular PART 2 – CONFIGURATION MONITOR which provides details for easily loading .BIN and .HEX files.

There is a wealth of information from Dave Dunfield on his Classic Computing page, which is where we obtained:

And, the Atari Clone downloads. particularly the Manuals page, source of:

Also, the Altair Front Panel page has several useful program examples.

One Jeff Tranter provided tidbits on the Macroassembler AS which has to be compiled from source, but apparently gets the job done.