Restoring YC's Xerox Alto day 10: New boards, running programs, mouse problems
righto.com
righto.com
You edit both programs and documents in Bravo. Programs in Mesa are usually written in variable-width fonts. (Somehow this never caught on. It looks nice. I used to bold Mesa keywords.) The file format is plain text, then a control-Z, then formatting information. The compiler reads up to the control-Z and stops, thus ignoring the formatting.
In other words they are progressing so well they will have python running on it despite the "limitations" of the Alto just to prove they can even if its just a simple hello world. I'm not actually expecting them to port python to it.
Generally this isn't a problem is the person putting together the system is actually running it, they might do this to keep it running after its maintenance contract has expired (happened with a lot of VAXes and PDP-11's) but it is a problem if a scrapper wants to get a premium for a "complete" system and they don't know if it works or not so they just put "the required boards/parts" together and call it a system.
Over the years I wound up donating them to various places (the Computer History Museum, the Kyoto Prize museum, the Boston Science Museum, etc.). We kept one at Viewpoints as a mascot, and my last one I gave to Sam Altman because he wanted to do a restoration. That one turned out to be a late hybrid that Ken Shirriff and company are having fun puzzling out.
The "random mouse on ebay" was at my suggestion, because the Alto I donated to Sam didn't have a mouse.
Most of the original runs of Alto IIs (at least 1500 of them were built) cost in 70s dollars about $22.5K apiece. Inflation (according to the web) since then has been about a factor of 5, so each Alto would have been about $112.5K (and I'd love to have a $112.5K personal computer today -- that would really be "computing in the future" as we did at Parc).