Perhaps the name Alto refers to the Xerox Alto; in any case it has Smalltalk-72 style up arrow on $5E and left arrow on $5F,
which I suspect were characters in ASCII 1963 but I do not know that for sure.
It works with GNU emacs in a simple terminal / vi / emacs etc.
For example in attach a cool looking UDP example with GNU smalltalk to send a datagram packet to the 'daytime' service,
and a piece of code computing an inverse of integer modulo p.
Re: Alto Serif Smalltalk-72 font with GNU smalltalk
In the emacs screenshots it shows some of the characters are hard to read.
For example this font has the '@' character replaced by some sort of 'happy face'.
On the other hand it's nice that the UNIX 'cat' command displays the underscore as back-arrow.
It also clarifies why it's perhaps not a good idea to use underscores in Smalltalk source code,
but the same was perhaps true for UNIX and C. Perhaps only later the underscore was allowed,
so that people now use in C identifiers like pthread_create etc.