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Line No. Rev Author Line
1 74 davidgb
/*
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 *      machine independent definitions and global variables
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 */
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#define YES     1
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#define NO      0
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#define ERR     (-1)
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#define MAXBUF  128
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#define MAXOP   10      /* longest mnemonic */
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#define MAXLAB  16
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#define E_LIMIT 32
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#define P_LIMIT 64
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#define MAXINCFILES  30 /* nestinf levels for  INCLUDE files at one time */
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                        /* ver TER_2.0 6/17/89 */
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#define MAXIFD    30    /* max nesting levels for IFD/IFND statements */
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                        /* ver TER_2.0 2 Jul 89 */
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#define IF_FALSE  0     /* tokens for IfMachine (conditional assembly) */
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#define IF_TRUE   1     /* added ver TER_2.0 27Jun89 */
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#define IF_ELSE   2
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#define IF_ENDIF  3
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#define IF_NORMAL 4
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#define IF_END    5
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#define IF_EOF    6     /* end tokens */
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/*      Character Constants     */
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#define NEWLINE '\n'
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#define CR      0x0D    /* <CR> or ^M ver TER_1.1 June 3, 1989 */
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#define TAB     '\t'
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#define BLANK   ' '
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#define EOS     '\0'
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/*      Opcode Classes          */
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#define INH     0       /* Inherent                     */
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#define GEN     1       /* General Addressing           */
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#define IMM     2       /* Immediate only               */
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#define REL     3       /* Short Relative               */
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#define P2REL   4       /* Long Relative                */
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#define P1REL   5       /* Long Relative (LBRA and LBSR)*/
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#define NOIMM   6       /* General except for Immediate */
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#define P2GEN   7       /* Page 2 General               */
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#define P3GEN   8       /* Page 3 General               */
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#define RTOR    9       /* Register To Register         */
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#define INDEXED 10      /* Indexed only                 */
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#define RLIST   11      /* Register List                */
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#define P2NOIMM 12      /* Page 2 No Immediate          */
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#define P2INH   13      /* Page 2 Inherent              */
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#define P3INH   14      /* Page 3 Inherent              */
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#define GRP2    15      /* Group 2 (Read/Modify/Write)  */
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#define LONGIMM 16      /* Immediate mode takes 2 bytes */
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#define BTB     17      /* Bit test and branch          */
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#define SETCLR  18      /* Bit set or clear             */
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#define CPD     19      /* compare d               6811 */
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#define XLIMM   20      /* LONGIMM for X           6811 */
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#define XNOIMM  21      /* NOIMM for X             6811 */
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#define YLIMM   22      /* LONGIMM for Y           6811 */
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#define YNOIMM  23      /* NOIMM for Y             6811 */
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#define FAKE    24      /* convenience mnemonics   6804 */
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#define APOST   25      /* A accum after opcode    6804 */
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#define BPM     26      /* branch reg plus/minus   6804 */
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#define CLRX    27      /* mvi x,0                 6804 */
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#define CLRY    28      /* mvi y,0                 6804 */
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#define LDX     29      /* mvi x,expr              6804 */
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#define LDY     30      /* mvi y,expr              6804 */
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#define MVI     31      /* mvi                     6804 */
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#define EXT     32      /* extended                6804 */
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#define BIT     33      /* bit manipulation        6301 */
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#define SYS     34      /* syscalls (really swi)        */
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#define PSEUDO  35      /* Pseudo ops                   */
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/* global variables */
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int     Line_num =0;            /* current line number          */
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int     Err_count =0;           /* total number of errors       */
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char    Line[MAXBUF] = {0};     /* input line buffer            */
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char    Label[MAXLAB] = {0};    /* label on current line        */
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char    Op[MAXOP] = {0};        /* opcode mnemonic on current line      */
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char    Operand[MAXBUF] = {0};  /* remainder of line after op           */
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                                /* (up to ';' rel TER_2.0) */
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char    *Optr =0;               /* pointer into current Operand field   */
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int     Result =0;              /* result of expression evaluation      */
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int     Force_word =0;          /* Result should be a word when set     */
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int     Force_byte =0;          /* Result should be a byte when set     */
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int     Pc =0;                  /* Program Counter              */
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int     Old_pc =0;              /* Program Counter at beginning */
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int     Last_sym =0;            /* result of last lookup        */
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int     Pass =0;                /* Current pass #               */
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int     N_files =0;             /* Number of files to assemble  */
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FILE    *Fd =0;                 /* Current input file structure */
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int     Cfn =0;                 /* Current file number 1...n    */
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int     Ffn =0;                 /* forward ref file #           */
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int     F_ref =0;               /* next line with forward ref   */
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char    **Argv =0;              /* pointer to file names        */
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int     E_total =0;             /* total # bytes for one line   */
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int     E_bytes[E_LIMIT] = {0}; /* Emitted held bytes           */
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int     E_pc =0;                /* Pc at beginning of collection*/
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int     Lflag = 0;              /* listing flag 0=nolist, 1=list*/
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int     P_force = 0;            /* force listing line to include Old_pc */
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int     P_total =0;             /* current number of bytes collected    */
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int     P_bytes[P_LIMIT] = {0}; /* Bytes collected for listing  */
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int     Cflag = 0;              /* cycle count flag */
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int     Cycles = 0;             /* # of cycles per instruction  */
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long    Ctotal = 0;             /* # of cycles seen so far */
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int     Sflag = 0;              /* symbol table flag, 0=no symbol */
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int     N_page = 0;             /* new page flag */
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int     Page_num = 2;           /* page number */
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int     CREflag = 0;            /* cross reference table flag */
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int     CRflag = 0;             /* flag to add <CR><LF> to S record */
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                                /* added ver TER_1.1 June 3, 1989 */
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int     nfFlag = 1;             /* if=1 number INCLUDE files separate */
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                                /* ver TER_2.0 June 17, 1989 */
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int     FdCount = 0;            /* INCLUDE files "stack" pointer */
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                                /* ver TER_2.0 June 17, 1989 */
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char    InclFName[MAXBUF]={0};  /* current INCLUDE file name */
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int     F_total = 0;            /* total bytes emitted in S file */
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                                /* ver (TER) 2.02 19 Jun 89 */
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int     Page_lines = 0;         /* total lines this page */
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                                /* ver (TER) 2.02 19 Jun 89 */
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int     Pflag50 = 0;            /* if 1 then form feed every 50 lines */
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                                /* ver (TER) 2.02 19 Jun 89 */
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int     Pflag75 = 0;            /* if 1 then form feed every 75 lines */
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                                /* ver (DWC) 2.10 8 Oct 2001 */
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int     PC_Save[4] = {0,0,0,0}; /* saved contents of CODE,DATA,BSS,AUTO PCs */
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                                /* ver TER_2.09 25 July 89 */
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int     PC_ptr = 0;             /* index or pointer to current PC */
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                        /* initialized to CODE ver TER_2.09 25 July 89 */
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struct link { /* linked list to hold line numbers */
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       int L_num; /* line number */
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       struct link *next; /* pointer to next node */
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};
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struct nlist { /* basic symbol table entry */
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        char    *name;
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        int     def;    /* value of symbol, assigned by user */
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        int     def2;   /* value assign by assembler, e.g. defined this pass? */
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                        /* added ver TER_2.0 4 Jul 89 */
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        struct nlist *Lnext ; /* left node of the tree leaf */
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        struct nlist *Rnext; /* right node of the tree leaf */
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        struct link *L_list; /* pointer to linked list of line numbers */
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};
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struct oper {   /* an entry in the mnemonic table */
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        char    *mnemonic;      /* its name */
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        char    class;          /* its class */
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        int     opcode;         /* its base opcode */
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        char    cycles;         /* its base # of cycles */
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};
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struct  nlist *root;            /* root node of the tree */
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FILE    *Objfil =0;             /* object file's file descriptor*/
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char    Obj_name[] = {"             "};
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struct  InclFile {      /* The INCLUDE files nesting "stack" */
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                        /* added ver TER_2.0 6/17/89 */
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        FILE    *fp;            /* saved file pointer (next level up) */
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        int     line_num;       /* saved line number count */
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        char    *name;  /* saved file name */
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                  };
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struct  InclFile InclFiles[MAXINCFILES];        /* the nesting stack itself */

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