Tweaked Input args and other stuff

Makefile

@@ -1,9 +1,10 @@
 .ONESHELL:
 
-CC=gcc
-O=2
-CFLAGS=`sdl2-config --cflags` `sdl2-config --libs`
-PREFIX=$(HOME)/.local
+CC = gcc
+O = 3
+CFLAGS = `sdl2-config --cflags` `sdl2-config --libs`
+PREFIX = $(HOME)/.local
+SRC = main.c
 
 all: ls7emulator
 
@@ -13,7 +14,7 @@ clean:
 
 ls7emulator:
 	cd src
-	$(CC) main.c -o ls7emulator $(CFLAGS) -O$(O) 
+	$(CC) $(SRC) -o ls7emulator $(CFLAGS) -O$(O) 
 	rm ../bin -rf
 	mkdir ../bin
 	cd ../bin
@@ -24,3 +25,6 @@ install: ls7emulator
 	mkdir -p $(PREFIX)/bin
 	install bin/ls7emulator $(PREFIX)/bin/ls7emulator
 	cp bin/ls7emulator /usr/bin/ls7emulator
+
+
+

src/config.h

@@ -10,24 +10,28 @@
 #define ROMLOC  	0xC000		/* ROM Page Location */
 
 #define BACKCOLOR sfBlack
-#define SCREEN_WIDTH 768
-#define SCREEN_HEIGHT 512
-#define SDL_X_SIZE 768
-#define SDL_Y_SIZE 512
+#define SDL_X_SIZE 384
+#define SDL_Y_SIZE 256
 
-#define PREAMBLE "LS7 Emulator by Gabriel Weingardt.\nLicense: GPL v.3+\n\n"
+#define PREAMBLE "LS7 Emulator by Gabriel Weingardt.\n\
+License: GPL v.3+\n\
+See: https://git.weingardt.dev/0xmac/LS7-Emulator\n\n"
 
 #define HELP "Usage: LS7Emulator [options] ... [file]\n\n\
 Options:        Type    Default     Desc\n\
 --help                              Show this menu\n\
 --help-keys                         Show emulator key functions\n\
---cpuspeed      [int]   100000      CPU Speed given in Herz. KHz and MHz annotations like 1KHz are supported\n\
---scale         [float]   2.0       Set the starting scale of the video output\n\
+--resizeable                        Make the window resizable\n\
 --singlestep                        Enable singlestepping with the 'F8' key\n\
+--reload-program                    Reload the binary file when CPU is reset\n\
+--randomize                         Randomize Computer and video RAM on reset\n\
+\n\
+--cpuspeed      [int]     1MHz      CPU Speed given in Herz. KHz and MHz formats like 1KHz are supported\n\
+--scale         [float]   1         Set the starting scale of the video output\n\
 --clocksteps    [int]     1         Set the clock cycles cycled by a singlestep\n\
 --snapshot      [string]            Import a CPU snapshot\n\
 --fps           [float]   30        Set the SDL FPS rate\n\
---enable-reload                     Reload the binary file when CPU is reset\n\
+--script        [string]            Execute a script when CPU is being reset (helpful for development)\n\
 \n"
 
 #define HELPKEYS "\

src/cpu.c

@@ -1,7 +1,7 @@
 /* Fake6502 CPU emulator core v1.1 *******************
  * (c)2011-2013 Mike Chambers                        *
  *                                                   *
- * Modified by Gabriel Weingardt                     *
+ * Modified for 65c02 by Gabriel Weingardt           *
  *****************************************************/
 
 #include <stdint.h>
@@ -130,6 +130,10 @@ static void zp() { //zero-page
     ea = (uint16_t)read6502((uint16_t)pc++);
 }
 
+static void izp() { // zero-page indirect (new 65c02 instruction)
+    
+}
+
 static void zpx() { //zero-page,X
     ea = ((uint16_t)read6502((uint16_t)pc++) + (uint16_t)x) & 0xFF; //zero-page wraparound
 }
@@ -201,6 +205,16 @@ static void indy() { // (indirect),Y
     }
 }
 
+// new 65c02 address mode
+static void aii() { // absolute indexed indirect
+    uint16_t eahelp, eahelp2;
+    eahelp = ((uint16_t)read6502(pc) | ((uint16_t)read6502(pc+1) << 8)) + x;
+    eahelp2 = (eahelp & 0xFF00) | ((eahelp + 1) & 0x00FF); //replicate 6502 page-boundary wraparound bug
+    ea = (uint16_t)read6502(eahelp) | ((uint16_t)read6502(eahelp2) << 8);
+    pc += 2;
+}
+
+
 static uint16_t getvalue() {
     if (addrtable[opcode] == acc) return((uint16_t)a);
     else return((uint16_t)read6502(ea));
@@ -336,6 +350,37 @@ static void bvs() {
     }
 }
 
+static void bra() { // new 65c02 instruction
+    oldpc = pc;
+    pc += reladdr;
+    if ((oldpc & 0xFF00) != (pc & 0xFF00)) clockticks6502 += 2; //check if jump crossed a page boundary
+    else clockticks6502++;
+}
+
+static void bbr() { // new 65c02 instruction
+    uint8_t testval = 1;
+    for (int i = 0; i < ((opcode & 0b01110000) >> 4); i++) testval = testval << 1;
+    
+    if (!(a & testval)) {
+        oldpc = pc;
+        pc += reladdr;
+        if ((oldpc & 0xFF00) != (pc & 0xFF00)) clockticks6502 += 2; //check if jump crossed a page boundary
+        else clockticks6502++;
+    }
+}
+
+static void bbs() { // new 65c02 instruction
+    uint8_t testval = 1;
+    for (int i = 0; i < ((opcode & 0b01110000) >> 4); i++) testval = testval << 1;
+    
+    if (a & testval) {
+        oldpc = pc;
+        pc += reladdr;
+        if ((oldpc & 0xFF00) != (pc & 0xFF00)) clockticks6502 += 2; //check if jump crossed a page boundary
+        else clockticks6502++;
+    }
+}
+
 static void clc() {
     clearcarry();
 }
@@ -522,9 +567,18 @@ static void pha() {
 }
 
 static void php() {
-    push8(status | FLAG_BREAK);
+    push8(status);
 }
 
+static void phy() { // new 65c02 instruction
+    push8(y);
+}
+
+static void phx() { // new 65c02 instruction
+    push8(x);
+}
+
+
 static void pla() {
     a = pull8();
 
@@ -536,6 +590,21 @@ static void plp() {
     status = pull8() | FLAG_CONSTANT;
 }
 
+
+static void ply() { // new 65c02 instruction
+    y = pull8();
+    
+    zerocalc(y);
+    signcalc(y);
+}
+
+static void plx() { // new 65c02 instruction
+    a = pull8();
+    
+    zerocalc(x);
+    signcalc(x);
+}
+
 static void rol() {
     value = getvalue();
     result = (value << 1) | (status & FLAG_CARRY);
@@ -608,6 +677,10 @@ static void sty() {
     putvalue(y);
 }
 
+static void stz() { // new 65c02 instruction
+    putvalue(0);
+}
+
 static void tax() {
     x = a;
 
@@ -647,44 +720,88 @@ static void tya() {
     signcalc(a);
 }
 
-static void (*addrtable[256])() = {
-/*        |  0  |  1  |  2  |  3  |  4  |  5  |  6  |  7  |  8  |  9  |  A  |  B  |  C  |  D  |  E  |  F  |     */
-/* 0 */     imp, indx,  imp, indx,   zp,   zp,   zp,   zp,  imp,  imm,  acc,  imm, abso, abso, abso, abso, /* 0 */
-/* 1 */     rel, indy,  imp, indy,  zpx,  zpx,  zpx,  zpx,  imp, absy,  imp, absy, absx, absx, absx, absx, /* 1 */
-/* 2 */    abso, indx,  imp, indx,   zp,   zp,   zp,   zp,  imp,  imm,  acc,  imm, abso, abso, abso, abso, /* 2 */
-/* 3 */     rel, indy,  imp, indy,  zpx,  zpx,  zpx,  zpx,  imp, absy,  imp, absy, absx, absx, absx, absx, /* 3 */
-/* 4 */     imp, indx,  imp, indx,   zp,   zp,   zp,   zp,  imp,  imm,  acc,  imm, abso, abso, abso, abso, /* 4 */
-/* 5 */     rel, indy,  imp, indy,  zpx,  zpx,  zpx,  zpx,  imp, absy,  imp, absy, absx, absx, absx, absx, /* 5 */
-/* 6 */     imp, indx,  imp, indx,   zp,   zp,   zp,   zp,  imp,  imm,  acc,  imm,  ind, abso, abso, abso, /* 6 */
-/* 7 */     rel, indy,  imp, indy,  zpx,  zpx,  zpx,  zpx,  imp, absy,  imp, absy, absx, absx, absx, absx, /* 7 */
-/* 8 */     imm, indx,  imm, indx,   zp,   zp,   zp,   zp,  imp,  imm,  imp,  imm, abso, abso, abso, abso, /* 8 */
-/* 9 */     rel, indy,  imp, indy,  zpx,  zpx,  zpy,  zpy,  imp, absy,  imp, absy, absx, absx, absy, absy, /* 9 */
-/* A */     imm, indx,  imm, indx,   zp,   zp,   zp,   zp,  imp,  imm,  imp,  imm, abso, abso, abso, abso, /* A */
-/* B */     rel, indy,  imp, indy,  zpx,  zpx,  zpy,  zpy,  imp, absy,  imp, absy, absx, absx, absy, absy, /* B */
-/* C */     imm, indx,  imm, indx,   zp,   zp,   zp,   zp,  imp,  imm,  imp,  imm, abso, abso, abso, abso, /* C */
-/* D */     rel, indy,  imp, indy,  zpx,  zpx,  zpx,  zpx,  imp, absy,  imp, absy, absx, absx, absx, absx, /* D */
-/* E */     imm, indx,  imm, indx,   zp,   zp,   zp,   zp,  imp,  imm,  imp,  imm, abso, abso, abso, abso, /* E */
-/* F */     rel, indy,  imp, indy,  zpx,  zpx,  zpx,  zpx,  imp, absy,  imp, absy, absx, absx, absx, absx  /* F */
-};
+static void trb() { // new 65c02 instruction
+    value = getvalue();
+    result = value & ~a;
+    
+    zerocalc(result);
+    putvalue(result);
+}
+
+static void tsb() { // new 65c02 instruction
+    value = getvalue();
+    result = value | a;
+    
+    zerocalc(result);
+    putvalue(result);
+}
+
+static void rmb() { // new 65c02 instruction
+    uint8_t testval = 1;
+    for (int i = 0; i < ((opcode & 0b01110000) >> 4); i++) testval = testval << 1;
+    
+    value = getvalue();
+    result = value & ~testval;
+    
+    putvalue(result);
+}
+
+static void smb() { // new 65c02 instruction
+    uint8_t testval = 1;
+    for (int i = 0; i < ((opcode & 0b01110000) >> 4); i++) testval = testval << 1;
+    
+    value = getvalue();
+    result = value | testval;
+    
+    putvalue(result);
+}
+
+static void wai() { // new 65c02 instruction
+    // implement later
+}
+
+static void stp() { // new 65c02 instruction
+    // implement later
+}
 
 static void (*optable[256])() = {
 /*        |  0  |  1  |  2  |  3  |  4  |  5  |  6  |  7  |  8  |  9  |  A  |  B  |  C  |  D  |  E  |  F  |      */
-/* 0 */      brk,  ora,  nop,  nop,  nop,  ora,  asl,  nop,  php,  ora,  asl,  nop,  nop,  ora,  asl,  nop, /* 0 */
-/* 1 */      bpl,  ora,  nop,  nop,  nop,  ora,  asl,  nop,  clc,  ora,  nop,  nop,  nop,  ora,  asl,  nop, /* 1 */
-/* 2 */      jsr,  and,  nop,  nop,  bit,  and,  rol,  nop,  plp,  and,  rol,  nop,  bit,  and,  rol,  nop, /* 2 */
-/* 3 */      bmi,  and,  nop,  nop,  nop,  and,  rol,  nop,  sec,  and,  nop,  nop,  nop,  and,  rol,  nop, /* 3 */
-/* 4 */      rti,  eor,  nop,  nop,  nop,  eor,  lsr,  nop,  pha,  eor,  lsr,  nop,  jmp,  eor,  lsr,  nop, /* 4 */
-/* 5 */      bvc,  eor,  nop,  nop,  nop,  eor,  lsr,  nop,  cli,  eor,  nop,  nop,  nop,  eor,  lsr,  nop, /* 5 */
-/* 6 */      rts,  adc,  nop,  nop,  nop,  adc,  ror,  nop,  pla,  adc,  ror,  nop,  jmp,  adc,  ror,  nop, /* 6 */
-/* 7 */      bvs,  adc,  nop,  nop,  nop,  adc,  ror,  nop,  sei,  adc,  nop,  nop,  nop,  adc,  ror,  nop, /* 7 */
-/* 8 */      nop,  sta,  nop,  nop,  sty,  sta,  stx,  nop,  dey,  nop,  txa,  nop,  sty,  sta,  stx,  nop, /* 8 */
-/* 9 */      bcc,  sta,  nop,  nop,  sty,  sta,  stx,  nop,  tya,  sta,  txs,  nop,  nop,  sta,  nop,  nop, /* 9 */
-/* A */      ldy,  lda,  ldx,  nop,  ldy,  lda,  ldx,  nop,  tay,  lda,  tax,  nop,  ldy,  lda,  ldx,  nop, /* A */
-/* B */      bcs,  lda,  nop,  nop,  ldy,  lda,  ldx,  nop,  clv,  lda,  tsx,  nop,  ldy,  lda,  ldx,  nop, /* B */
-/* C */      cpy,  cmp,  nop,  nop,  cpy,  cmp,  dec,  nop,  iny,  cmp,  dex,  nop,  cpy,  cmp,  dec,  nop, /* C */
-/* D */      bne,  cmp,  nop,  nop,  nop,  cmp,  dec,  nop,  cld,  cmp,  nop,  nop,  nop,  cmp,  dec,  nop, /* D */
-/* E */      cpx,  sbc,  nop,  nop,  cpx,  sbc,  inc,  nop,  inx,  sbc,  nop,  sbc,  cpx,  sbc,  inc,  nop, /* E */
-/* F */      beq,  sbc,  nop,  nop,  nop,  sbc,  inc,  nop,  sed,  sbc,  nop,  nop,  nop,  sbc,  inc,  nop  /* F */
+/* 0 */      brk,  ora,  nop,  nop,  tsb,  ora,  asl,  rmb,  php,  ora,  asl,  nop,  tsb,  ora,  asl,  bbr, /* 0 */
+/* 1 */      bpl,  ora,  ora,  nop,  trb,  ora,  asl,  rmb,  clc,  ora,  inc,  nop,  trb,  ora,  asl,  bbr, /* 1 */
+/* 2 */      jsr,  and,  nop,  nop,  bit,  and,  rol,  rmb,  plp,  and,  rol,  nop,  bit,  and,  rol,  bbr, /* 2 */
+/* 3 */      bmi,  and,  and,  nop,  bit,  and,  rol,  rmb,  sec,  and,  dec,  nop,  bit,  and,  rol,  bbr, /* 3 */
+/* 4 */      rti,  eor,  nop,  nop,  nop,  eor,  lsr,  rmb,  pha,  eor,  lsr,  nop,  jmp,  eor,  lsr,  bbr, /* 4 */
+/* 5 */      bvc,  eor,  eor,  nop,  nop,  eor,  lsr,  rmb,  cli,  eor,  phy,  nop,  nop,  eor,  lsr,  bbr, /* 5 */
+/* 6 */      rts,  adc,  nop,  nop,  stz,  adc,  ror,  rmb,  pla,  adc,  ror,  nop,  jmp,  adc,  ror,  bbr, /* 6 */
+/* 7 */      bvs,  adc,  adc,  nop,  stz,  adc,  ror,  rmb,  sei,  adc,  ply,  nop,  jmp,  adc,  ror,  bbr, /* 7 */
+/* 8 */      bra,  sta,  nop,  nop,  sty,  sta,  stx,  smb,  dey,  bit,  txa,  nop,  sty,  sta,  stx,  bbs, /* 8 */
+/* 9 */      bcc,  sta,  sta,  nop,  sty,  sta,  stx,  smb,  tya,  sta,  txs,  nop,  stz,  sta,  stz,  bbs, /* 9 */
+/* A */      ldy,  lda,  ldx,  nop,  ldy,  lda,  ldx,  smb,  tay,  lda,  tax,  nop,  ldy,  lda,  ldx,  bbs, /* A */
+/* B */      bcs,  lda,  lda,  nop,  ldy,  lda,  ldx,  smb,  clv,  lda,  tsx,  nop,  ldy,  lda,  ldx,  bbs, /* B */
+/* C */      cpy,  cmp,  nop,  nop,  cpy,  cmp,  dec,  smb,  iny,  cmp,  dex,  wai,  cpy,  cmp,  dec,  bbs, /* C */
+/* D */      bne,  cmp,  cmp,  nop,  nop,  cmp,  dec,  smb,  cld,  cmp,  phx,  stp,  nop,  cmp,  dec,  bbs, /* D */
+/* E */      cpx,  sbc,  nop,  nop,  cpx,  sbc,  inc,  smb,  inx,  sbc,  nop,  sbc,  cpx,  sbc,  inc,  bbs, /* E */
+/* F */      beq,  sbc,  sbc,  nop,  nop,  sbc,  inc,  smb,  sed,  sbc,  plx,  nop,  nop,  sbc,  inc,  bbs  /* F */
+};
+
+static void (*addrtable[256])() = {
+    /*        |  0  |  1  |  2  |  3  |  4  |  5  |  6  |  7  |  8  |  9  |  A  |  B  |  C  |  D  |  E  |  F  |     */
+    /* 0 */     imp, indx,  imp, indx,   zp,   zp,   zp,   zp,  imp,  imm,  acc,  imm, abso, abso, abso, rel, /* 0 */
+    /* 1 */     rel, indy,  izp, indy,   zp,  zpx,  zpx,   zp,  imp, absy,  acc, absy, abso, absx, absx, rel, /* 1 */
+    /* 2 */    abso, indx,  imp, indx,   zp,   zp,   zp,   zp,  imp,  imm,  acc,  imm, abso, abso, abso, rel, /* 2 */
+    /* 3 */     rel, indy,  izp, indy,  zpx,  zpx,  zpx,   zp,  imp, absy,  acc, absy, absx, absx, absx, rel, /* 3 */
+    /* 4 */     imp, indx,  imp, indx,   zp,   zp,   zp,   zp,  imp,  imm,  acc,  imm, abso, abso, abso, rel, /* 4 */
+    /* 5 */     rel, indy,  izp, indy,  zpx,  zpx,  zpx,   zp,  imp, absy,  imp, absy, absx, absx, absx, rel, /* 5 */
+    /* 6 */     imp, indx,  imp, indx,   zp,   zp,   zp,   zp,  imp,  imm,  acc,  imm,  ind, abso, abso, rel, /* 6 */
+    /* 7 */     rel, indy,  izp, indy,  zpx,  zpx,  zpx,   zp,  imp, absy,  imp, absy,  aii, absx, absx, rel, /* 7 */
+    /* 8 */     rel, indx,  imm, indx,   zp,   zp,   zp,   zp,  imp,  imm,  imp,  imm, abso, abso, abso, rel, /* 8 */
+    /* 9 */     rel, indy,  izp, indy,  zpx,  zpx,  zpy,   zp,  imp, absy,  imp, absy, abso, absx, absx, rel, /* 9 */
+    /* A */     imm, indx,  imm, indx,   zp,   zp,   zp,   zp,  imp,  imm,  imp,  imm, abso, abso, abso, rel, /* A */
+    /* B */     rel, indy,  izp, indy,  zpx,  zpx,  zpy,   zp,  imp, absy,  imp, absy, absx, absx, absy, rel, /* B */
+    /* C */     imm, indx,  imm, indx,   zp,   zp,   zp,   zp,  imp,  imm,  imp,  imp, abso, abso, abso, rel, /* C */
+    /* D */     rel, indy,  izp, indy,  zpx,  zpx,  zpx,   zp,  imp, absy,  imp,  imp, absx, absx, absx, rel, /* D */
+    /* E */     imm, indx,  imm, indx,   zp,   zp,   zp,   zp,  imp,  imm,  imp,  imm, abso, abso, abso, rel, /* E */
+    /* F */     rel, indy,  izp, indy,  zpx,  zpx,  zpx,   zp,  imp, absy,  imp, absy, absx, absx, absx, rel  /* F */
 };
 
 static const uint32_t ticktable[256] = {
@@ -716,10 +833,14 @@ void nmi6502() {
 }
 
 void irq6502() {
-    push16(pc);
-    push8(status);
-    status |= FLAG_INTERRUPT;
-    pc = (uint16_t)read6502(0xFFFE) | ((uint16_t)read6502(0xFFFF) << 8);
+    // only initiate interrupts when interrupt flag is cleared
+    
+    if (!(status & FLAG_INTERRUPT)){
+        push16(pc);
+        push8(status);
+        status |= FLAG_INTERRUPT;
+        pc = (uint16_t)read6502(0xFFFE) | ((uint16_t)read6502(0xFFFF) << 8);
+    }
 }
 
 void step6502() {

src/events.c

@@ -20,6 +20,7 @@ extern void step6502();
 extern void updateRenderStates();
 extern void scanKeyboard();
 extern void clearScreen(uint32_t[], uint32_t);
+extern void sdlResize();
 
 static SDL_Scancode currentKey = SDL_SCANCODE_UNKNOWN;
 static SDL_Event event;
@@ -65,11 +66,13 @@ void pollEvents(){
 					case SDL_SCANCODE_F6:	/* Scale -- */
 						clearScreen(renderMemory, 0x000000FF);
 						if (displayScale > 1) displayScale--;
-					break;
+						sdlResize();
+						break;
 					
 					case SDL_SCANCODE_F7:	/* Scale ++ */
 						clearScreen(renderMemory, 0x000000FF);
 						displayScale++;
+						sdlResize();
 						break;
 						
 					case SDL_SCANCODE_F8:	/* CPU Singlestep */

src/main.c

@@ -1,4 +1,6 @@
 #include <SDL2/SDL_render.h>
+#include <SDL2/SDL_video.h>
+#include <ctype.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <stdlib.h>
@@ -9,8 +11,8 @@
 #include "config.h"
 
 /* Preset Values */
-static float displayScale = 2;
-static int cpuSpeed = 100000; // 100 kHz
+static float displayScale = 1;
+static int cpuSpeed = 1000000; // 1 MHz
 static int singleStep = 0;
 static int clockSteps = 1;
 
@@ -28,6 +30,7 @@ uint8_t showDebug = 0;
 uint8_t fpsCount = 0;
 uint8_t displayMmap = 0;
 uint8_t documentReload = 0;
+uint8_t randomize = 0;
 
 uint8_t fpsStore = 60;
 uint8_t FPS = 30;
@@ -36,12 +39,11 @@ uint8_t cpuHealth;
 unsigned long cpuTicks = 0;
 unsigned long tickTrigger = 0;
 
-
-
 char debugString[512];
 char snapshotFile[32];
 char *reloadExecute;
 char *inputFile;
+char *displaySpeed;
 
 int openFile(){
     FILE *file = fopen(inputFile, "rb");
@@ -61,25 +63,52 @@ int openFile(){
 }
 
 void resetSystem(){
+    srand((unsigned)time(NULL));
+    
+    if (randomize) {
+        for (int i = 0; i < RAMSIZE + 1; i++) ram[i] = rand();
+    }
+    
     initVideo();
     updateVideo();
     reset6502();
 }
 
-void fetchArgs(int argc, char *argv[]){
-    printf(PREAMBLE);
+int parseFormat(char *format){
+    float retVal = 0;
+    int i = 0;
+    for (;isdigit(format[i]) || format[i] == '.'; i++);
     
+    char tmp = format[i];
+    format[i] = 0;
+    retVal = atof(format);
+    format[i] = tmp;
+    
+    if      (!strcasecmp((format + i), "hz"));
+    else if (!strcasecmp((format + i), "khz")) retVal *= 1000;
+    else if (!strcasecmp((format + i), "mhz")) retVal *= 1000000;
+    else {
+        printf("\"%s\" is not a supported format\nSupported formats include: Hz, KHz and MHz\n", (format + i));
+        exit(EXIT_FAILURE);
+    }
+    
+    return (int)retVal;
+}
+
+void fetchArgs(int argc, char *argv[]){
     for (int i = 1; i < argc; i++) {
-        if (!strcmp(argv[i], "--help"))                 printf(HELP);
-        else if (!strcmp(argv[i], "--help-keys"))       printf(HELPKEYS);
-        else if (!strcmp(argv[i], "--cpuspeed"))        cpuSpeed = atoi(argv[++i]);
+        if (!strcmp(argv[i], "--help"))                 { printf(PREAMBLE); printf(HELP); exit(0); }
+        else if (!strcmp(argv[i], "--help-keys"))       { printf(PREAMBLE); printf(HELPKEYS); exit(0); }
+        else if (!strcmp(argv[i], "--cpuspeed"))        { cpuSpeed = parseFormat(argv[++i]); displaySpeed = argv[i]; }
         else if (!strcmp(argv[i], "--scale"))           displayScale = atof(argv[++i]);
         else if (!strcmp(argv[i], "--singlestep"))      singleStep = 1;
         else if (!strcmp(argv[i], "--clocksteps"))      clockSteps = atoi(argv[++i]);
         //else if (!strcmp(argv[i], "--snapshot"))        snapshotFile = &argv[i];
-        else if (!strcmp(argv[i], "--fps"))		        FPS = atoi(argv[++i]);
-        else if (!strcmp(argv[i], "--enable-reload"))   documentReload = 1;
-        else if (!strcmp(argv[i], "--reload-execute"))  reloadExecute = argv[++i];
+        else if (!strcmp(argv[i], "--fps"))             FPS = atoi(argv[++i]);
+        else if (!strcmp(argv[i], "--reload-program"))  documentReload = 1;
+        else if (!strcmp(argv[i], "--script"))          reloadExecute = argv[++i];
+        else if (!strcmp(argv[i], "--resizable"))       WINMODE |= SDL_WINDOW_RESIZABLE;
+        else if (!strcmp(argv[i], "--randomize"))       randomize = 1;
         else {
             inputFile = argv[i];
             if (openFile()){
@@ -90,6 +119,7 @@ void fetchArgs(int argc, char *argv[]){
     }
 }
 
+
 int main(int argc, char *argv[]){
     fetchArgs(argc, argv);    
     initWindow();
@@ -129,34 +159,32 @@ int main(int argc, char *argv[]){
     
         if (halt) {
             drawString("!CPU Haltet!", renderMemory, 
-                SDL_X_SIZE, 0x000000FF, time(NULL) % 2 ? 0xAAAAAAFF : 0xFFFFFFFF, 16, vStack, 2);
+                SDL_X_SIZE, 0x000000FF, time(NULL) % 2 ? 0xAAAAAAFF : 0xFFFFFFFF, 16, vStack, 1);
             
-            vStack += (FONT_HEIGHT * 2 * 2);
+            vStack += (FONT_HEIGHT * 2);
         } if (showDebug){
             sprintf(debugString, "LOADED BINARY: \"%s\"\nSCREENSIZE: %dx%d\nFPS: %d\nSCALE: %d", inputFile, SDL_X_SIZE, SDL_Y_SIZE, fpsStore, (int)displayScale);
             drawString(debugString, renderMemory, 
-                    SDL_X_SIZE, 0x000000FF, 0xAAAAAAFF, 16, vStack, 2);
+                    SDL_X_SIZE, 0x000000FF, 0xAAAAAAFF, 16, vStack, 1);
             
-            vStack += (FONT_HEIGHT * 4 * 2);
+            vStack += (FONT_HEIGHT * 4);
 
-            sprintf(debugString, "CPU: %d%%", cpuHealth);
+            sprintf(debugString, "CPU: %d%% @ %s", cpuHealth, displaySpeed);
             drawString(debugString, renderMemory, 
                     SDL_X_SIZE, 0x000000FF, time(NULL) % 2 ? 0xAAAAAAFF : cpuHealth < 10 ? 
-                    0xFF0000FF : cpuHealth < 50 ? 0xFFFF00FF : 0xAAAAAAFF, 16, vStack, 2);
+                    0xFF0000FF : cpuHealth < 50 ? 0xFFFF00FF : 0xAAAAAAFF, 16, vStack, 1);
 
-            vStack += (FONT_HEIGHT * 2 * 2);
+            vStack += (FONT_HEIGHT * 2);
         } if (displayMmap){
             sprintf(debugString, "RAM:      $%04X - $%04X\nROM:      $%04X - $%04X\nVIAADDRS: $%04X\nKBDADDRS: $%04X\nVIDADDRS: $%04X", RAMLOC, RAMLOC + RAMSIZE, ROMLOC, ROMLOC + ROMSIZE, VIAADDRS, KBDADDRS, VIDADDRS);
-            drawString(debugString, renderMemory, SDL_X_SIZE, 0x000000FF, 0xAAAAAAFF, 16, vStack, 2);
+            drawString(debugString, renderMemory, SDL_X_SIZE, 0x000000FF, 0xAAAAAAFF, 16, vStack, 1);
 
-            vStack += (FONT_HEIGHT * 6 * 2);
+            vStack += (FONT_HEIGHT * 6);
         } if (showHelp) {
-            drawString(HELPKEYS, renderMemory, SDL_X_SIZE, 0x000000FF, 0xAAAAAAFF, 16, vStack, 2);
+            drawString(HELPKEYS, renderMemory, SDL_X_SIZE, 0x000000FF, 0xAAAAAAFF, 16, vStack, 1);
             
-            vStack += (FONT_HEIGHT * 2 * 2);
+            vStack += (FONT_HEIGHT * 2);
         }
-        
-        
  
         if (SDL_UpdateTexture(texture, NULL, renderMemory, (sizeof(uint32_t) * SDL_X_SIZE))) { 
             fprintf(stderr, "Could not update SDL texture: %s.\n", SDL_GetError());

src/sdlinit.c

@@ -1,7 +1,11 @@
 #include <SDL2/SDL.h>
+#include <SDL2/SDL_video.h>
 #include "config.h"
 #include "font.h"
 
+extern float displayScale;
+int WINMODE = 0;
+
 static SDL_Window *window;
 static SDL_Renderer *renderer;
 static SDL_Texture *texture;
@@ -16,7 +20,7 @@ void initWindow(){
     
     window = SDL_CreateWindow("LS7 Emulator", 
                               SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
-                              SCREEN_WIDTH, SCREEN_HEIGHT, 0);
+                              SDL_X_SIZE, SDL_Y_SIZE, WINMODE);
     if (window == NULL){
         printf("Fatal! Could not create SDL Window: %s\n", SDL_GetError());
         exit(EXIT_FAILURE);
@@ -30,7 +34,7 @@ void initWindow(){
     
     texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888,
                                 SDL_TEXTUREACCESS_STREAMING,
-                                SCREEN_WIDTH, SCREEN_HEIGHT);
+                                SDL_X_SIZE, SDL_Y_SIZE);
     if (texture == NULL){
         printf("Fatal! Could not create SDL Texture: %s\n", SDL_GetError());
         exit(EXIT_FAILURE);
@@ -42,6 +46,10 @@ void initWindow(){
     }
 }
 
+void sdlResize(){
+    SDL_SetWindowSize(window, SDL_X_SIZE * displayScale, SDL_Y_SIZE * displayScale);
+}
+
 void clearScreen(uint32_t pixels[], uint32_t color){
     for (uint32_t i = 0; i < SDL_X_SIZE * SDL_Y_SIZE; i++) pixels[i] = color;
 }

src/video.c

@@ -6,6 +6,7 @@
 #define LOWCOLOR 96
 
 extern float displayScale;
+extern uint8_t randomize;
 
 /* Public Variables */
 int8_t videoModified;
@@ -50,8 +51,9 @@ void initVideo(){
 	videoMode = 0x01;
 	updatePalette();
 	
-	/* Fill VRAM with random values, just for fun */
-	for (int i = 0; i < 0x8000; i++) videoMemory[i] = rand();
+	if (randomize) {
+		for (int i = 0; i < 0x8000; i++) videoMemory[i] = rand();
+	}
 }
 
 void writeVideo(){
@@ -86,26 +88,16 @@ void setPixels(uint8_t x, uint8_t y){
 		videoColorValue = videoMemory[(y * 128) + (x | 0x40)];
 	}
 	
-	// Snipping out the upper 8 colors
-	// videoColorValue &= 0x77;
-	
 	for (uint8_t i = 0; i < 8; i++){
-		if (displayScale == 1){
-			renderMemory[(y * SDL_X_SIZE) + ((x * 8) + i)] = (videoValue & (128 >> i)) ? videoColorIndex[((videoColorValue & 0xF0) >> 4)] : videoColorIndex[(videoColorValue & 0x0F)];
-		} else {
-			for (uint8_t _x = 0; _x < displayScale; _x++){
-				for (uint8_t _y = 0; _y < displayScale; _y++){
-					renderMemory[(((y * (int)displayScale) + _y) * SDL_X_SIZE) + ((((x * (int)displayScale) * 8) + (i * (int)displayScale)) + _x)] = (videoValue & (128 >> i)) ? videoColorIndex[((videoColorValue & 0xF0) >> 4)] : videoColorIndex[(videoColorValue & 0x0F)];
-				}
-			}
-		}
+		renderMemory[(y * SDL_X_SIZE) + ((x * 8) + i)] = 
+				(videoValue & (128 >> i)) ? 
+				videoColorIndex[((videoColorValue & 0xF0) >> 4)] : 
+				videoColorIndex[(videoColorValue & 0x0F)];
 	}
 }
 
 void updateVideo(){
-	if (videoModified){
-		//sfVertexArray_clear(renderArray);
-		
+	if (videoModified){		
 		for (uint16_t y = 0; y < 256; y++){
 			for (uint8_t x = 0; x < 48; x++){
 				setPixels(x, (uint8_t)y);