Phil Budne
ff4d793ca5
another round of (hopeful) improvements
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add indirect bit to "sys" definition
set initial ".." (output base) to 4096 (not yet honored)
add "ptr" output format (binary in paper tape reader format: 3 frames of 6 bits)
remove IOT instrictions (system source uses sop.s)
always write labels to "n.out"
add debug output
fix multiply defined error handling (process symbolic labels on both passes)
2016-03-01 11:22:53 -05:00
Phil Budne
66909ac6fd
fix bugs noted by warren
2016-03-01 11:22:29 -05:00
Phil Budne
aeceb8614a
move whitespace removal back in word loop
2016-03-01 01:43:24 -05:00
Phil Budne
249ce47e44
OR syllables by default (allows multiple OPR instructions)
2016-02-29 14:24:37 -05:00
Phil Budne
9e148edefc
changes in expression parsing
2016-02-28 16:29:01 -05:00
Phil Budne
815d8bc220
comment out debug prints
2016-02-25 21:03:39 -05:00
Phil Budne
2cca3d4473
finish s1.s; tried to clean up s5-s8; let as7 continue after error
2016-02-25 20:58:17 -05:00
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
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
