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Annotation of researchv10dc/man/mana/redcode.6, revision 1.1.1.1

1.1       root        1: .TH REDCODE 6 5/20/84
                      2: .CM 3
                      3: .SH NAME
                      4: redcode \- assembler for mars game
                      5: .SH SYNOPSIS
                      6: .I redcode
                      7: .I file ...
                      8: .SH DESCRIPTION
                      9: .I Redcode
                     10: is an assembler for the
                     11: assembly language given by Kee Dewdney in the
                     12: `Computer Recreations',
                     13: .I Scientific American,
                     14: May, 1984.
                     15: The command line lists of source file names ending in
                     16: .LR .red .
                     17: They are assembled into corresponding
                     18: object files with names ending in
                     19: .LR .obj .
                     20: .PP
                     21: A source file consists of a
                     22: .L name
                     23: directive giving the program's name,
                     24: then any number of program and data statements,
                     25: then an
                     26: .L end
                     27: directive that gives the starting location of the program.
                     28: Statements have the following syntax:
                     29: .IP
                     30: [label] opcode arg1 [arg2] [; comment]
                     31: .PP
                     32: There are three addressing modes;
                     33: all address calculations are done modulo 8000.
                     34: .LP
                     35: .nf
                     36: .I
                     37: Syntax         Meaning
                     38: #[0-9]+                immediate
                     39: [0-9]+         relative
                     40: @[0-9]+                indirect, relative
                     41: .PP
                     42: The following opcodes are implemented, along with the corresponding
                     43: semantics specified in pseudo-C:
                     44: .PP
                     45: .nf
                     46: .I
                     47: Instruction    Mnem    Opcode  Args    Explanation
                     48: Move           mov     1       A B     B=A
                     49: Add            add     2       A B     B+=A
                     50: Subtract       sub     3       A B     B-=A
                     51: Jump           jmp     4       A       PC=A
                     52: Jump if zero   jmz     5       A B     PC=(B==0)?A:PC+1
                     53: Jump if greater        jmg     6       A B     PC=(B<4000)?A:PC+1
                     54: Dec, Jmp if 0  djz     7       A B     PC=(--B==0)?A:PC+1
                     55: Compare                cmp     8       A B     PC=(A==B)?PC+1:PC+2
                     56: .PP
                     57: The following non-executable directives may be used
                     58: to reserve and initialize data space:
                     59: .PP
                     60: .I
                     61: Directive      Mnem    Arg     Explanation
                     62: Buffer space   bss     n       Reserve n words
                     63: Data           data    A       Initialize 1 word
                     64: Name           name    't'     Name of program
                     65: End            end     start   Specify starting location
                     66: .PP
                     67: The program was written by Paul Milazzo at Rice.
                     68: For documentation on the object code format, see
                     69: .IR mars (6).
                     70: .SH EXAMPLES
                     71: .EX
                     72:        name    'dwarf'
                     73: site   data    -1              ; address of last 0 'bomb'
                     74: start  add     #5      site    ; move site forward
                     75:        mov     #0      @site   ; write 0 'bomb'
                     76:        jmp     start           ; loop
                     77:        end     start
                     78: .EE
                     79: .SH SEE ALSO
                     80: .IR mars (6)

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