61 lines
No EOL
2.3 KiB
Markdown
61 lines
No EOL
2.3 KiB
Markdown
# MCS-4 Programs
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This directory contains binary program files for the Intel MCS-4 emulator.
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## Available Programs
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### fibonacci.bin
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- **Size:** 33 bytes (16 instructions × 2 bytes each + 1 extra byte)
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- **Description:** Basic Fibonacci sequence generator (stores results in RAM)
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- **Algorithm:** Calculates first 8 Fibonacci numbers using registers and RAM
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- **Instructions Used:** LDM, LD, WRM, IAC, ADD, JCN, NOP
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- **Output:** Results stored in RAM locations 0-7 (not visible to user)
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### fibonacci_output.bin ✨ **RECOMMENDED**
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- **Size:** 55 bytes (27 instructions × 2 bytes each + 1 extra byte)
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- **Description:** Enhanced Fibonacci sequence generator with output port visibility
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- **Algorithm:** Calculates first 8 Fibonacci numbers and outputs them to output ports
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- **Instructions Used:** LDM, LD, WRM, IAC, ADD, JCN, NOP, SRC
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- **Output:** Each Fibonacci number visible on output ports 0-7 during execution
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- **Features:** Real-time visibility of calculation progress
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## Usage
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Programs are automatically loaded by the emulator. Use the `--file` option to specify a different program:
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```bash
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# Use default fibonacci program (RAM-based)
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cargo run -- --system basic
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# Use enhanced fibonacci program with output ports ✨
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cargo run -- --system basic --file programs/fibonacci_output.bin
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# Use specific program
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cargo run -- --system basic --file programs/myprogram.bin
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```
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## Adding New Programs
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1. Create your MCS-4 assembly program
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2. Assemble it into raw binary format (big-endian byte pairs)
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3. Save as `.bin` file in this directory
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4. Update this README with program details
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## Program Format
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MCS-4 programs are stored as raw binary data where each instruction is represented as 8-bit bytes. Multi-byte instructions (like addresses) use big-endian format.
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## Program Development Tips
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### Making Programs Visible
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- **Use Output Ports:** Write results to output ports (0x14-0x17) for visibility
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- **SRC Instruction:** Select output port with `SRC` before `WRM`
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- **Real-time Output:** Numbers appear on output ports during execution
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- **System Monitoring:** Watch RAM contents and output port states in real-time
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### Example Output Port Usage
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```asm
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LDM 5 ; Load value 5
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SRC 0 ; Select output port 0
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WRM ; Write to output port 0 (now visible to user)
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``` |