Merge pull request #5 from kostDev/dev

merge dev
kostDev · Aug 21, 2024 · 7f7b834 · 7f7b834
2 parents cefef97 + 0bc22b4
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diff --git a/README.md b/README.md
@@ -10,7 +10,20 @@ A minimalist and educational 6502 CPU emulator written in JavaScript. This proje
 	•	Memory Management: Includes basic read/write operations for memory handling.
 	•	Customizable: Designed with simplicity in mind, making it easy to extend and modify.
  	•	Testing: Covered with tests 11/151 OPCODES, which are official and documented guidelines. (in progress)
-
+
+### 6502 Instructions by Category
+
+| Load | Trans | Stack | Shift | Logic | Arith | Inc | Ctrl | Bra | Flags | Nop |
+|------|-------|-------|-------|-------|-------|-----|------|-----|-------|-----|
+| LDA  | TAX   | PHA   | ASL   | AND   | ADC   | DEC | BRK  | BCC | CLC   | NOP |
+| LDX  | TAY   | PHP   | LSR   | BIT   | CMP   | DEX | JMP  | BCS | CLD   |     |
+| LDY  | TSX   | PLA   | ROL   | EOR   | CPX   | DEY | JSR  | BEQ | CLI   |     |
+| STA  | TXA   | PLP   | ROR   | ORA   | CPY   | INC | RTI  | BMI | CLV   |     |
+| STX  | TXS   |       |       |       | SBC   | INX | RTS  | BNE | SEC   |     |
+| STY  | TYA   |       |       |       |       | INY |      | BPL | SED   |     |
+|      |       |       |       |       |       |     |      | BVC | SEI   |     |
+|      |       |       |       |       |       |     |      | BVS |       |     |
+
 #### Installation
 
 Clone the repository and navigate to the project directory:

diff --git a/js/opcodes.js b/js/opcodes.js
@@ -223,7 +223,7 @@ const OPCODES = {
     },
     0x87: "", // sax("d") // illegal
     0x88: {
-        name: "DEX", // Decrement Index X by One
+        name: "DEY", // Decrement Index Y by One
         t: 2,
         code: 0x88,
         run: (cpu) => {

diff --git a/js/opcodes.md b/js/opcodes.md
@@ -0,0 +1,45 @@
+### Opcodes progress (22/151)
+
+| Dec | Opcode |  Instruction   | Status |
+|:---:|:------:|:--------------:|:------:|
+|  0  |  0x00  |      BRK       |   ✅    |
+|  9  |  0x09  | ORA #immediate |   ✅    |
+| 29  |  0x29  | AND #immediate |   ✅    |
+| 41  |  0x49  | EOR #immediate |   ✅    |
+| 84  |  0x84  |  STY zeropage  |   ✅    |
+| 85  |  0x85  |  STA zeropage  |   ✅    |
+| 86  |  0x86  |  STX zeropage  |   ✅    |
+| 88  |  0x88  |      DEY       |   ✅    |
+| 90  |  0x90  |      BCC       |   ✅    |
+| 98  |  0x98  |      TYA       |   ✅    |
+| 105 |  0x69  | ADC #immediate |   ✅    |
+| 138 |  0x8A  |      TXA       |   ✅    |
+| 160 |  0xA0  | LDY #immediate |   ✅    |
+| 162 |  0xA2  | LDX #immediate |   ✅    |
+| 168 |  0xA8  |      TAY       |   ✅    |
+| 169 |  0xA9  | LDA #immediate |   ✅    |
+| 170 |  0xAA  |      TAX       |   ✅    |
+| 200 |  0xC8  |      INY       |   ✅    |
+| 202 |  0xCA  |      DEX       |   ✅    |
+| 232 |  0xE8  |      INX       |   ✅    |
+| 233 |  0xE9  | SBC #immediate |   ✅    |
+| 234 |  0xEA  |      NOP       |   ✅    |
+
+
+### Opcodes in progress:
+
+<details>
+    <summary><b>Opcodes for <span style="color: orange">LDA</span></b></summary>
+
+|  Dec  |  Opcode  |    Instruction     |     Mode     |  Cycles  |  Status  |
+|:-----:|:--------:|:------------------:|:------------:|:--------:|----------|
+|  169  |   0xA9   |   LDA #immediate   |  Immediate   |    2     |    ✅️    |
+|  165  |   0xA5   |    LDA zeropage    |   Zeropage   |    3     |    ❌     |
+|  181  |   0xB5   |   LDA zeropage,X   |  Zeropage,X  |    4     |    ❌     |
+|  173  |   0xAD   |    LDA absolute    |   Absolute   |    4     |    ❌     |
+|  189  |   0xBD   |   LDA absolute,X   |  Absolute,X  |  4 (+1)  |    ❌     |
+|  185  |   0xB9   |   LDA absolute,Y   |  Absolute,Y  |  4 (+1)  |    ❌     |
+|  161  |   0xA1   |  LDA (indirect,X)  |  Indirect,X  |    6     |    ❌     |
+|  177  |   0xB1   |  LDA (indirect),Y  |  Indirect,Y  |  5 (+1)  |    ❌     |
+
+</details>