separate preprocessor directives into smaller libraries

src/includes.h

@@ -0,0 +1,32 @@
+/*
+    TVM is a virtual machine for LC-3 based operating systems and it is used for educational purposes.
+    Copyright (c) under MIT license
+    Written by Erick Ahmed, 2022
+*/
+
+/* List of all the libraries needed to run tyvm.c */
+
+//#define __UNIX        // uncomment ONLY if compiling for unix-based operative system
+
+/* universal libraries */
+    #include <stdint.h>
+    #include <stdio.h>
+    #include <signal.h>
+
+/* unix only libraries */
+#ifdef __UNIX
+    #include <stdlib.h>
+    #include <string.h>
+    #include <unistd.h>
+    #include <fcntl.h>
+
+    /* sys libraries */
+    #include <sys/time.h>
+    #include <sys/types.h>
+    #include <sys/termios.h>
+    #include <sys/mman.h>
+/* windows only libraries */
+#else
+    #include <Windows.h>
+    #include <conio.h>
+#endif

src/registers.h

@@ -0,0 +1,69 @@
+/*
+    TVM is a virtual machine for LC-3 based operating systems and it is used for educational purposes.
+    Copyright (c) under MIT license
+    Written by Erick Ahmed, 2022
+*/
+
+
+/* memory mapped register tables */
+enum mmr {
+    MMR_KSR = 0xFE00,   // keyboard status
+    MMR_KDR = 0xFE02    // keyboard data
+};
+
+/* Initializing 10 registers of which:
+8 general purpose, 1 program counter, 1 conditional */
+enum registers {
+    RG_000 = 0,
+    RG_001,
+    RG_010,
+    RG_011,
+    RG_100,
+    RG_101,
+    RG_110,
+    RG_111,
+    RG_PC,           // program counter
+    RG_COND,         // condition flag
+    RG_COUNT
+};
+
+/* Trap codes used for OP_TRAP */
+enum trapcodes {
+    TRAP_GETC  = 0x20,  // get charcter from keyboard
+    TRAP_OUT   = 0x21,  // output a character
+    TRAP_PUTS  = 0x22,  // output a word string
+    TRAP_IN    = 0x23,  // get charcter from keyboard and echo to terminal
+    TRAP_PUTSP = 0x24,  // output a byte string
+    TRAP_HALT  = 0x25   // halt program
+};
+
+/* Initializing memory and register storages */
+uint16_t memory[UINT16_MAX];
+uint16_t reg[RG_COUNT];
+
+/* Creating instruction set opcodes */
+enum opcodes {      // [name, 8-bit value]
+    OP_BR = 0,      // branch, 0000
+    OP_ADD,         // add, 0001
+    OP_LD,          // load, 0010
+    OP_ST,          // store, 0011
+    OP_JSR,         // jump register, 0100
+    OP_AND,         // bitwise and, 0101
+    OP_LDR,         // load register, 0110
+    OP_STR,         // store register, 0111
+    OP_RTI,         // unused opcode
+    OP_NOT,         // bitwise not, 1001
+    OP_LDI,         // indirect load, 1010
+    OP_STI,         // indirect store, 1011
+    OP_JMP,         // jump, 1100
+    OP_RES,         // reserved opcode,
+    OP_LEA,         // load effective address, 1110
+    OP_TRAP,        // execute trap, 1111
+};
+
+/* Creating condition flags */
+enum flags {
+    FL_P = 1,         // Positive
+    FL_Z = 1 << 1,    // Zero
+    FL_N = 1 << 2,    // Negative
+};

src/tyvm.c

@@ -4,33 +4,10 @@
     Written by Erick Ahmed, 2022
 */
 
-//#define __UNIX        // uncomment ONLY if compiling on unix-based operative system
+#include "includes.h"
-
+#include "registers.h"
-/* universal libraries */
-    #include <stdint.h>
-    #include <stdio.h>
-    #include <signal.h>
-
-/* unix only libraries */
-#ifdef __UNIX
-    #include <stdlib.h>
-    #include <string.h>
-    #include <unistd.h>
-    #include <fcntl.h>
-
-    /* sys libraries */
-    #include <sys/time.h>
-    #include <sys/types.h>
-    #include <sys/termios.h>
-    #include <sys/mman.h>
-/* windows only libraries */
-#else
-    #include <Windows.h>
-    #include <conio.h>
-#endif
 
 #ifndef __UNIX
-    /* windows only declaration */
     HANDLE hStdin = INVALID_HANDLE_VALUE;
 #endif
 
@@ -38,69 +15,6 @@
 #define FALSE 0
 
 
-/* memory mapped register tables */
-enum mmr {
-    MMR_KSR = 0xFE00,   // keyboard status
-    MMR_KDR = 0xFE02    // keyboard data
-};
-
-/* Initializing 10 registers of which:
-8 general purpose, 1 program counter, 1 conditional */
-enum registers {
-    RG_000 = 0,
-    RG_001,
-    RG_010,
-    RG_011,
-    RG_100,
-    RG_101,
-    RG_110,
-    RG_111,
-    RG_PC,           // program counter
-    RG_COND,         // condition flag
-    RG_COUNT
-};
-
-/* Trap codes used for OP_TRAP */
-enum trapcodes {
-    TRAP_GETC  = 0x20,  // get charcter from keyboard
-    TRAP_OUT   = 0x21,  // output a character
-    TRAP_PUTS  = 0x22,  // output a word string
-    TRAP_IN    = 0x23,  // get charcter from keyboard and echo to terminal
-    TRAP_PUTSP = 0x24,  // output a byte string
-    TRAP_HALT  = 0x25   // halt program
-};
-
-/* Initializing memory and register storages */
-uint16_t memory[UINT16_MAX];
-uint16_t reg[RG_COUNT];
-
-/* Creating instruction set opcodes */
-enum opcodes {      // [name, 8-bit value]
-    OP_BR = 0,      // branch, 0000
-    OP_ADD,         // add, 0001
-    OP_LD,          // load, 0010
-    OP_ST,          // store, 0011
-    OP_JSR,         // jump register, 0100
-    OP_AND,         // bitwise and, 0101
-    OP_LDR,         // load register, 0110
-    OP_STR,         // store register, 0111
-    OP_RTI,         // unused opcode
-    OP_NOT,         // bitwise not, 1001
-    OP_LDI,         // indirect load, 1010
-    OP_STI,         // indirect store, 1011
-    OP_JMP,         // jump, 1100
-    OP_RES,         // reserved opcode,
-    OP_LEA,         // load effective address, 1110
-    OP_TRAP,        // execute trap, 1111
-};
-
-/* Creating condition flags */
-enum flags {
-    FL_P = 1,         // Positive
-    FL_Z = 1 << 1,    // Zero
-    FL_N = 1 << 2,    // Negative
-};
-
 /* Sign extension function for immediate add mode (imm5[0:4])
 transforms 5bit number to 8bit number preserving sign*/
 uint16_t sign_extend(uint16_t n, int bit_count) {
@@ -215,14 +129,11 @@ int mem_read(uint16_t address) {
     }
 #endif
 
-//#ifdef __UNIX
+void handle_interrupt(int signal) {
-    void handle_interrupt(int signal) {
+    restore_input_buffering();
-        restore_input_buffering();
+    printf("\n");
-        printf("\n");
+    exit(-2);
-        exit(-2);
+}
-    }
-//#endif
-
 
 
 int main(int argc, const char* argv[]) {