| /* %%%%%%%%%%%%%%%%%%%% (c) William Landi 1991 %%%%%%%%%%%%%%%%%%%%%%%%%%%% */ |
| /* Permission to use this code is granted as long as the copyright */ |
| /* notice remains in place. */ |
| /* ============================= constants.h =============================== */ |
| /* A collection of commonly used constants for the assembler. */ |
| |
| |
| /* DEBUG_FLAG_1 Controls whether certain lines of the program. */ |
| /* Execution or non-execution of these lines aids in */ |
| /* Debugging the program. */ |
| #define DEBUG_FLAG_1 0 |
| |
| /* LABEL_SIZE_1 Size of the largest valid LABEL in characters */ |
| #define LABEL_SIZE_1 8 |
| |
| /* MEM_SIZE_1 Size of SIC/XE main memory in bytes */ |
| /* NOTE: 2^20 = 1048576 */ |
| #define MEM_SIZE_1 1048576 |
| |
| /* MEM_ADDR_SIZE_1 Number of BITS in an address {log2(MEM_SIZE_1)} */ |
| #define MEM_ADDR_SIZE_1 20 |
| |
| /* BITS_PER_WORD_1 Number of BITS in a WORD */ |
| #define BITS_PER_WORD_1 24 |
| |
| /* MAX_INT_1 Biggest integer+1: 2^BITS_PER_WORD_1 */ |
| #define MAX_INT_1 16777216 |
| |
| /* BITS_PER_HALFBYTE_1 Number of BITS in a Half BYTE */ |
| #define BITS_PER_HALFBYTE_1 4 |
| |
| /* BITS_PER_BYTE_2 Number of BITS in a BYTE */ |
| #define BITS_PER_BYTE_2 8 |
| |
| /* HEX_CHAR_PER_BYTE_1 Number of hexidecimal characters (ASCII) must be */ |
| /* used to produce a 1 BYTE value. */ |
| #define HEX_CHAR_PER_BYTE_1 2 |
| |
| /* LARGEST_INSTRUCT_SIZE_1 Size in BITS of the the largest instruction in */ |
| /* SIC/XE. Format 4 is 32 bits */ |
| #define LARGEST_INSTRUCT_SIZE_1 32 |
| |
| /* MAX_PC_RELATIVE_1 Smallest number that will NOT fit in a PC relative*/ |
| /* address. {4096 = 2^12} */ |
| #define MAX_PC_RELATIVE_1 4096 |
| |
| /* GLOBAL_1 Module name for Global labels -- used by LOADER. */ |
| #define GLOBAL_1 "_GLOBAL " |
| |
| /* -------------------------- Boolean Constants ---------------------------- */ |
| #define FALSE_1 0 |
| #define TRUE_1 1 |
| |
| |
| /* ------------------- Expression types (LABELS,CONSTANTS,etc) ------------- */ |
| #define ABSOLUTE_OR_RELATIVE_1 0 /* Don't know type */ |
| #define ABSOLUTE_VALUE_1 1 /* Absolute expressions */ |
| #define RELATIVE_VALUE_1 2 /* Relative expressions */ |
| #define EXTERN_VALUE_1 3 /* An external reference */ |
| |
| |
