Warren Toomey
a132327a8b
a7out: I had the spa logic wrong. Now fixed.
2016-02-26 21:45:55 +10:00
Warren Toomey
0efc7cf96b
Merge branch 'master' of https://github.com/DoctorWkt/pdp7-unix
2016-02-26 21:29:16 +10:00
Warren Toomey
6534bd6d43
I renamed simplecat.s to wktcat.s
2016-02-26 21:28:22 +10:00
Warren Toomey
536de9ea56
I worked out the bug with the command-line arguments, I was overwriting
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017777, oops. I've added more comments to wktcat.s (renamed from
simplecat.s). Now we need to find out how the real PDP-7 Unix
does command line arguments.
2016-02-26 21:26:44 +10:00
Warren Toomey
8f8cc64d10
I've added tad and sza to the a7out simulator, and I also added some
...
code to place command-line arguments into the simulated memory. I'm
trying to write my own version of cat so I can compare mine to the
real one. Right now there's a bug when simplecat has two arguments.
Zero and one arguments are OK! Saving so I have a backup before proceeding.
2016-02-26 20:56:31 +10:00
Warren Toomey
b8550475b0
I've got a very simple cat program working, which reads from stdin and
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sends it to stdout.
2016-02-26 18:43:20 +10:00
Warren Toomey
ba80514cbd
Remind people to put in the page numbers and filenames!
2016-02-26 17:35:58 +10:00
Warren Toomey
c84b2dffdd
I've changed the assembler so that it groks the <ab> string literal
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syntax. I think it's OK, but it probably needs more testing.
write_test.s was changed to exercise the string parsing.
2016-02-26 07:35:36 +10:00
Warren Toomey
018af6f43e
Ken Thompson sent e-mail in to explain that there can be labels mid-line, such as
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sys write; 1:0; 4
so I modified the assembler logic to support this, and added some code to write_test.s
to verify that it works.
2016-02-26 06:52:43 +10:00
Warren Toomey
f9b8c8eeb2
Changed as7 to allow sys open statements, rewrite write_test.s to
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use this syntax, and fixed up a bug in sys_open in a7out.
2016-02-26 06:19:27 +10:00
Warren Toomey
ed46793781
Added cat.s.
2016-02-26 06:01:47 +10:00
Warren Toomey
4b9f851a84
Explain how to assemble and run the program.
2016-02-25 18:50:00 +10:00
Warren Toomey
45fb97e051
An assembly program to test the a7out user-mode simulator.
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Expext its contents to change often as a7out is written.
2016-02-25 18:47:17 +10:00
Warren Toomey
cc678483e1
I've added read() now, but I haven't tested it fully yet.
2016-02-25 18:43:44 +10:00
Warren Toomey
b463500f37
I've got a few system calls working: open, close, write, exit along with the
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instructions dac, lac, iot and hlt. I can print Hello, world\n, yay!
2016-02-25 18:12:57 +10:00
Warren Toomey
a6f220b570
Dennis' paper of course.
2016-02-25 11:19:35 +10:00
Warren Toomey
f5554d1181
The beginnings of the user-mode simulator: three instructions so far
2016-02-25 10:25:43 +10:00
Warren Toomey
c6a928b8b4
More notes on the assembly syntax.
2016-02-25 07:52:26 +10:00
Warren Toomey
1bce0d48e3
Rename text file with .txt
2016-02-25 07:47:50 +10:00
Warren Toomey
e1fbafafcb
Caching my Github username
2016-02-25 07:46:59 +10:00
Warren Toomey
66d4b90a92
Document the notes/ dir.
2016-02-25 07:40:04 +10:00
Warren Toomey
e3815482a3
First few pages of the s1 section of the kernel typed in. I've added some cruft
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at the bottom so that I can test my assembler. I'll take that out later.
2016-02-25 07:37:59 +10:00
Warren Toomey
ba69e4e3e7
Miscellaneous notes about the assembler format and useful URLs.
2016-02-25 07:37:15 +10:00
Warren Toomey
550f6486ee
Hopefully a more readable layout on the Github web site.
2016-02-25 07:05:29 +10:00
Warren Toomey
ecdd711b46
More details of the layout of the repository.
2016-02-25 07:03:59 +10:00
Warren Toomey
6e5986d1c7
First version of the file to document what scans are done.
2016-02-25 07:01:20 +10:00
Warren Toomey
73ea3c665b
Hand-typed version of the cat source code with my own comments to
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explain what it is doing.
2016-02-25 06:56:04 +10:00
Warren Toomey
07c95bbe15
I commented out most of the debug lines, and I now output the octal code
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along with the input line that generated it. There is code to use values
of defined constants as well as defined labels.
2016-02-24 13:25:24 +10:00
Warren Toomey
f46777b272
Added code to output the final machine code in octal. Parse
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the 'i' argument to instructions that indicate indirect mode.
2016-02-24 11:15:47 +10:00
Warren Toomey
d70b4e87cc
First version of as7, which is definitely incomplete. I now need some
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example assembly programs and their machine code octal dumps so that
I can complete as7 and get it working properly.
2016-02-24 09:16:32 +10:00
Warren Toomey
9b19ce4af5
Made it fit into 80 columns
2016-02-24 09:15:12 +10:00
Warren Toomey