Jan. 3, 1977
The date on this letter is incorrect. It was actually written in 1978, not 1977.
DEPARTMENT OF PHYSICS
Jan. 3, 1977
Mr. J. Torzewski
51625 Chestnut Road
Granger, IN 46530
Dear Mr. Torzewski:
I am glad to see, from the December issue of Interface Age, that you
are collecting Apple I programs. After more than a year of struggling with
the Apple I, I have pretty much put it aside since I have been able to get
the use of computers with better hardware and software support (Cromemco Z1
and now an Apple II). But I did write some programs for it, which are
enclosed with this letter.
The enclosed cassette has two tracks of programs: A, starting at 0
on my tape counter, and B which starts at 10. A contains
A1 (280-7FF) Program to display large characters
A2 (800-FFF) Extended monitor (apparently a design study for the
B1 (700-71C) Porgram to display ASCII HEX equivalents o f any
B2 (750-776) Program to display ASCII HEX equivalents of all
B3 (7C0-7FF) Improved search subroutine for disassembler (like the
one I published in the October issue of Interface Age, except that it prints
only two lines of disassembled code)
B4 (700-9FF) Disassembler (as published in Dr. Dobb's Journal and
B5 (A00-BFF) Primitive, line oriented text editor
I had expanded the Apple I memory to 20K and have a 16K Star Trek
and a floating point calculator program. However, I have taken out the 16K
chips and put them in the Apple II and so can no longer run these. If you
want, I can make copie on the Apple II, but I cannot test them.
It will be interesting to hear what programs you find. I would also
be interested in any information on how to interface the Apple I. I do have
an SWTP printer connected to it, but that is all.
Arthur L. Schawlow