mor stuff, mostly ui
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0a08fa128b
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1aff62163a
104
source/app.d
104
source/app.d
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@ -21,6 +21,12 @@ struct Chip8Status {
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Disassembly
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}
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enum DisassemblyMode {
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Linear,
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Recursive,
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Dynamic
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}
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private {
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Chip8* emu_;
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@ -29,11 +35,13 @@ struct Chip8Status {
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int range_end_;
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// disassembly state
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DisassemblyMode ass_mode_;
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Instr[] disassembly_;
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}
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void initialize(Chip8* emu) {
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mode_ = ViewMode.Disassembly;
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emu_ = emu;
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} // initialize
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@ -55,39 +63,54 @@ struct Chip8Status {
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default: return "%s";
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}
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}
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}
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} // formatQual
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void disassemble() {
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ubyte[] instrs = emu_.ram[range_start_ .. range_end_];
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disassembly_ = Assembler.disassemble(instrs);
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writefln("%s", disassembly_);
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}
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} // disassemble
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void setRange(ushort start, ushort end) {
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range_start_ = start;
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range_end_ = end;
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}
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} // setRange
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void reset() {
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disassembly_ = null;
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} // reset
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void draw() {
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import std.range : chunks;
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if (mode_ == ViewMode.Memory) igBegin("Emulator Assembly - Memory View");
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else if (mode_ == ViewMode.Disassembly) igBegin("Emulator Assembly - Disassembly View");
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if (igButton("Switch Mode")) {
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mode_ = cast(ViewMode)((mode_ + 1) % 2);
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}
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igBegin("Emulator Assembly");
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igRadioButton("Memory View", cast(int*)&mode_, cast(int)ViewMode.Memory); igSameLine();
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igRadioButton("Disassembly View", cast(int*)&mode_, cast(int)ViewMode.Disassembly);
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if (mode_ == ViewMode.Memory) {
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} else if (mode_ == ViewMode.Disassembly) {
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igInputInt("Range Start: ", &range_start_);
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igInputInt("Range End: ", &range_end_);
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igInputInt("Range Start ", &range_start_);
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igInputInt("Range End ", &range_end_);
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igNewLine();
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igText("Disassembly Mode");
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igRadioButton("Linear", cast(int*)&ass_mode_, cast(int)DisassemblyMode.Linear); igSameLine();
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igRadioButton("Recursive", cast(int*)&ass_mode_, cast(int)DisassemblyMode.Recursive); igSameLine();
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igRadioButton("Dynamic", cast(int*)&ass_mode_, cast(int)DisassemblyMode.Dynamic);
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if (igButton("Disassemble")) {
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final switch (ass_mode_) with (DisassemblyMode) {
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case Linear:
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disassemble();
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break;
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case Recursive:
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break;
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case Dynamic:
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break;
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}
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}
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}
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if (range_start_ < 0) range_start_ = 0;
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if (range_start_ > ushort.max) range_start_ = 0;
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@ -102,7 +125,20 @@ struct Chip8Status {
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}
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*/
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} else if (mode_ == ViewMode.Disassembly) {
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int cur_offset = range_start_;
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foreach (ref instr; disassembly_) {
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if (emu_.cpu.pc == cur_offset) {
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igTextColored(ImColor(0, 255, 0), "0x%03X |", cur_offset);
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cur_offset += 2;
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igSameLine();
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} else {
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igText("0x%03X |", cur_offset);
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cur_offset += 2;
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igSameLine();
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}
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switch (instr.args) {
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case 3:
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@ -111,12 +147,12 @@ struct Chip8Status {
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Arg a1_arg;
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auto a1 = instr.a1(a1_arg);
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igText(formatQual(a1_arg), a1, true);
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igText(formatQual(a1_arg, true), a1);
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igSameLine();
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Arg a2_arg;
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auto a2 = instr.a2(a2_arg);
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igText(formatQual(a2_arg), a2, true);
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igText(formatQual(a2_arg, true), a2);
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igSameLine();
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Arg a3_arg;
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@ -132,7 +168,7 @@ struct Chip8Status {
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Arg a1_arg;
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auto a1 = instr.a1(a1_arg);
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igText(formatQual(a1_arg), a1, true);
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igText(formatQual(a1_arg, true), a1);
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igSameLine();
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Arg a2_arg;
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@ -221,6 +257,7 @@ struct Chip8Status {
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loaded_program = null;
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emu_.reset();
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ass_.reset();
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} // resetShortcut
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@ -232,6 +269,7 @@ struct Chip8Status {
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auto buf = read("programs/chip8_picture.ch8");
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emu_.load(0x200, buf); // do ze load yes, will copy all the data in
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ass_.setRange(cast(ushort)0x200, cast(ushort)(0x200 + cast(ushort)buf.length));
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ass_.reset();
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} // loadShortcut
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@ -417,6 +455,25 @@ pure
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struct Chip8 {
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ubyte[80] chip8_fontset = [
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0xF0, 0x90, 0x90, 0x90, 0xF0, // 0
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0x20, 0x60, 0x20, 0x20, 0x70, // 1
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0xF0, 0x10, 0xF0, 0x80, 0xF0, // 2
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0xF0, 0x10, 0xF0, 0x10, 0xF0, // 3
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0x90, 0x90, 0xF0, 0x10, 0x10, // 4
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0xF0, 0x80, 0xF0, 0x10, 0xF0, // 5
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0xF0, 0x80, 0xF0, 0x90, 0xF0, // 6
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0xF0, 0x10, 0x20, 0x40, 0x40, // 7
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0xF0, 0x90, 0xF0, 0x90, 0xF0, // 8
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0xF0, 0x90, 0xF0, 0x10, 0xF0, // 9
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0xF0, 0x90, 0xF0, 0x90, 0x90, // A
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0xE0, 0x90, 0xE0, 0x90, 0xE0, // B
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0xF0, 0x80, 0x80, 0x80, 0xF0, // C
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0xE0, 0x90, 0x90, 0x90, 0xE0, // D
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0xF0, 0x80, 0xF0, 0x80, 0xF0, // E
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0xF0, 0x80, 0xF0, 0x80, 0x80 // F
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];
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alias OpCode = ushort;
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alias ProgramCounter = ushort;
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alias Memory = ubyte[4096];
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@ -461,8 +518,18 @@ struct Chip8 {
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ram[offset .. offset + data.length] = cast(ubyte[])data[];
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loadFont(); // again
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} // load
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void loadFont() {
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foreach (i, b; chip8_fontset) {
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ram[i] = b;
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}
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} // loadFont
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void reset() {
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reset_flag = true;
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@ -655,7 +722,7 @@ struct Chip8 {
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import std.random : uniform;
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ubyte x = cpu.opcode.x;
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cpu.v[x] = uniform(Register.min, Register.max) & (cpu.opcode & 0x00FF);
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cpu.v[x] = uniform(Register.min, Register.max) & x;
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break;
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// 0xDXYN
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@ -706,6 +773,7 @@ struct Chip8 {
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case 0x0001: // 0xEXA1 Skips the next instruction if the key stored in VX isn't pressed.
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writefln("0xEXA1: skip instruction if VX not pressed: %x", key);
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pc_target += 2;
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break;
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default: //unhandled for some reason
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@ -748,8 +816,8 @@ struct Chip8 {
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case 0x0029: // 0xFX29 Sets I to the location of the sprite for the character in VX.
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immutable ubyte vx = cpu.v[cpu.opcode.x];
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immutable ushort char_addr = 0x200 + (vx * 40); // base of char sprites + value of vx * bits per character
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// immutable ushort char_addr = vx * 0x5;
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// immutable ushort char_addr = 0x200 + (vx * 40); // base of char sprites + value of vx * bits per character
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immutable ushort char_addr = vx * 0x05;
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cpu.i = char_addr;
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break;
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@ -260,6 +260,9 @@ struct Assembler {
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auto instr_output = Appender!(Instruction[])();
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foreach (ref ubyte[] i; instructions.chunks(2)) {
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if (i.length != 2) break;
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ushort opcode = i[0] << 8 | i[1];
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switch (opcode & 0xF000) {
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@ -273,7 +276,8 @@ struct Assembler {
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break;
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default: // 0x0NNN Calls RCA 1802 program at address NNN. Not necessary for most ROMs. | SYS addr
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//assert(0, "0x0NNN RCA 1802 program opcode not implemented!");
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instr_output ~= Instruction(opcode, OpCode.SYS, Argument.addr);
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// instr_output ~= Instruction(opcode, OpCode.SYS, Argument.addr);
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instr_output ~= Instruction(opcode, OpCode.UNK);
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break;
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}
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break;
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