[CSCI2321] Strange behavior of computer.ijs in class.

[John Howland]

I have fixed the problems we experienced in class today when
we looked at the contents of computer.ijs and
http://www.cs.trinity.edu/About/The_Courses/cs2321/computer/

The problem was that last year, the J people changed the behavior
of names defined in a script using =. rather than =: .  The behavior
now mimicks the behavior of use of =. (localized name assignment)
in an explicit definition.

In the file computer.ijs (in the class files directory) all function
definitions used =. rather than =: .  I have changed that as noted
in the example below.  Now require and script may be used as we
had been in other examples.

[jhowland at Ariel jhowland]$ cd cs2321
[jhowland at Ariel cs2321]$ j
    require'computer.ijs '
    trace
0
    trace =: 1
    pc =: 4
    proc 0
pc= 4, ir= 0, ac= 0
mem= 0 0 0 0 307 108 409 22 3 0
22
    proc 0
pc= 5, ir= 307, ac= 22
mem= 0 0 0 0 307 108 409 22 3 0
25
    proc 1
pc= 6, ir= 108, ac= 25
mem= 0 0 0 0 307 108 409 22 3 0
pc= 7, ir= 409, ac= 25
mem= 0 0 0 0 307 108 409 22 3 25
invalid operation code
    pc
8


_______________________________________________________________
John E. Howland       url: http://www.cs.trinity.edu/~jhowland/
Computer Science    email: jhowland at ariel.cs.trinity.edu
Trinity University  voice: (210) 999-7364
One Trinity Place     fax: (210) 999-7477
San Antonio, Texas  78212-7200