parsons/ParsonsMasterSystem2026
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Got main system and VDP working! There is a display!

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This commit is contained in:
Marc Parsons
2026-05-10 02:43:11 +01:00
parent 778f03b55c
commit f4e279b9c8
8 changed files with 516 additions and 104 deletions
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78
Core/SmsMachine.cs
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@@ -1,6 +1,9 @@
using Core.Cpu;
using Core.Io;
using Core.Memory;
using System;
using System.IO;
using System.Collections.Generic;
namespace Core
{
@@ -9,18 +12,17 @@ namespace Core
public Z80 Cpu { get; private set; }
public SmsMemoryBus MemoryBus { get; private set; }
public SmsIoBus IoBus { get; private set; }
public Core.Video.SmsVdp VideoProcessor { get; private set; }
public ushort? Breakpoint { get; set; } = null;
// NTSC SMS T-States per frame
public const int TStatesPerFrame = 59736;
public long TotalFrameCount { get; private set; } = 0;
public double FramesPerSecond { get; private set; } = 0;
public double FrameTime { get; private set; } = 0;
public SmsMachine()
{
MemoryBus = new SmsMemoryBus();
IoBus = new SmsIoBus();
VideoProcessor = new Core.Video.SmsVdp();
IoBus = new SmsIoBus { VideoProcessor = this.VideoProcessor };
Cpu = new Z80(MemoryBus, IoBus);
}
@@ -34,8 +36,23 @@ namespace Core
{
MemoryBus.CleanRAMData();
Cpu.Reset();
}
// We will reset the VDP and PSG here later!
public int StepMachine()
{
// 1. Tick the CPU
int tStates = Cpu.Step();
// 2. Tell the VDP how much time just passed
VideoProcessor.Update(tStates);
// 3. Trigger interrupts if the VDP hit scanline 192
if (VideoProcessor.InterruptPending)
{
tStates += Cpu.RequestInterrupt();
}
return tStates;
}
public void RunFrame()
@@ -44,18 +61,51 @@ namespace Core
while (currentFrameTStates < TStatesPerFrame)
{
int tStates = Cpu.Step();
currentFrameTStates += tStates;
currentFrameTStates += StepMachine();
string filePath = "captured_data.txt";
// --- FUTURE EXPANSION ---
// VideoProcessor.Update(tStates);
// AudioProcessor.Update(tStates);
// Mock data to loop through
//List<ushort> sensorReadings = new List<ushort> { Cpu.PC, Cpu.AF.Word, Cpu.BC.Word, Cpu.DE.Word, Cpu.HL.Word, Cpu.SP};
//List<string> type = new List<string> {"PC: 0x", "AF: 0x", "BC: 0x", "DE: 0x", "HL: 0x", "SP: 0x" };
// if (VideoProcessor.IsVBlanking && VideoProcessor.InterruptsEnabled)
// {
// Cpu.RequestInterrupt();
// }
//try
//{
// // 2. Initialize StreamWriter within a 'using' block
// // The 'true' parameter means "append" to the file. Use 'false' to overwrite.
// using (StreamWriter writer = new StreamWriter(filePath, append: true))
// {
// foreach (int reading in sensorReadings)
// {
// string timestamp = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
// // 3. Construct your string and write it
// foreach (string _type in type)
// {
// string line = $"{timestamp} | {_type} {reading}";
// writer.WriteLine(line);
// }
// // Optional: Console feedback
// //Console.WriteLine($"Logged: {line}");
// }
// }
// // File is automatically closed and saved here
// //Console.WriteLine("Data capture complete.");
//}
//catch (IOException e)
//{
// Console.WriteLine($"An error occurred: {e.Message}");
//}
// THE TRIPWIRE: Check the breakpoint after EVERY single instruction!
if (Breakpoint.HasValue && Cpu.PC == Breakpoint.Value)
{
break; // Abort the frame loop immediately!
}
}
}
}
}