H4M CPLD (#2335)

* Added CPLD code for H4M

* Added CPLD code for H4M

* Added CPLD code for H4M

* Added CPLD code for H4M

* Clean up

* Clean up

hardware/portapack_h4m/CPLD/README.md

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+# Project Setup Guide
+
+## Prerequisites
+
+- Intel Quartus Prime
+- Supra-2023.02.b0-7773ca8a-win64-all
+
+## Installation Steps
+
+1. **Project Setup**
+
+- Create a new AG256SL100 project in Quartus Prime
+- (Alternatively, copy an existing project)
+
+2. **Code Implementation**
+
+- Implement your code in the project
+- Compile the project to verify there are no errors
+- Ensure successful compilation before proceeding
+
+3. **Supra Configuration**
+
+- Launch Supra.exe
+- Navigate to: File → Project → Open Project
+- Select the H4M project when prompted
+- Select Tools → Migrate → Next
+
+4. **Additional Setup**
+
+- Follow the on-screen prompts
+- You will need to:
+    - Open a second Quartus project
+    - Execute a provided script
+
+5. **Programming**
+
+- In Supra, go to: Tools → Program
+- Click "Query device ID"
+- Verify the returned ID is: 0x00025610
+
+6. **File Selection**
+
+- Select the programming file (if not automatically loaded)
+- Use the .prg file from the Supra src folder (non-SRAM version)
+
+7. **Programming Process**
+
+- Click "Program" to begin
+- Note: The counter shows elapsed seconds, not progress percentage
+- Programming is complete when "USB driver disconnected" message appears
+
+## Troubleshooting
+
+If you encounter any issues, ensure:
+
+- All prerequisites are properly installed
+- Project configurations are correct
+- Device connections are secure