public void Read()
{
var buffer = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
const uint frameSize = 4;
var ram = new Ram(buffer, frameSize);
var pageSet = new PageInfo();
var pcb = new ProcessContextBlock {
Id = 1
};
ram.Allocate(pcb);
pageSet.Append(ram.Allocate(pcb));
pageSet.Append(ram.Allocate(pcb));
var pageStream = new PageStream(ram, pageSet);
Assert.That(pageStream.Length, Is.EqualTo(8));
var b = new byte[6];
pageStream.Read(b, 0, 6);
Assert.That(pageStream.Position, Is.EqualTo(6));
Assert.That(b, Is.EquivalentTo(new[] { 5, 6, 7, 8, 9, 10 }));
}
public void Write()
{
var buffer = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
const uint frameSize = 4;
var ram = new Ram(buffer, frameSize);
var pageSet = new PageInfo();
var pcb = new ProcessContextBlock {
Id = 1
};
ram.Allocate(pcb);
pageSet.Append(ram.Allocate(pcb));
pageSet.Append(ram.Allocate(pcb));
var pageStream = new PageStream(ram, pageSet);
Assert.That(pageStream.Length, Is.EqualTo(8));
var b = new byte[] { 91, 92, 93, 94, };
pageStream.Position = 2;
pageStream.Write(b, 0, 4);
Assert.That(buffer, Is.EquivalentTo(new[] { 1, 2, 3, 4, 5, 6, 91, 92, 93, 94, 11, 12, }));
}
public void Free()
{
var ram = new Ram(2, 1);
var pcb = new ProcessContextBlock {
Id = 1
};
var frame = ram.Allocate(pcb);
Assert.That(frame, Is.Not.Null);
frame = ram.Allocate(pcb);
Assert.That(frame, Is.Not.Null);
ram.Free(frame);
frame = ram.Allocate(pcb);
Assert.That(frame, Is.Not.Null);
}
public void Allocate()
{
var ram = new Ram(2, 1);
var pcb = new ProcessContextBlock {
Id = 1
};
var page = ram.Allocate(pcb);
Assert.That(page, Is.Not.Null);
Assert.That(page.PageNumber, Is.Not.EqualTo(0));
page = ram.Allocate(pcb);
Assert.That(page, Is.Not.Null);
Assert.That(page.PageNumber, Is.Not.EqualTo(0));
page = ram.Allocate(pcb);
Assert.That(page, Is.Null);
}
public void CreateShared()
{
var ram = new Ram(1024, 256);
var offset = ram.AllocateShared(512);
Assert.That(offset, Is.EqualTo(0));
var pcb = new ProcessContextBlock {
Id = 10
};
var p1 = ram.Allocate(pcb);
var p2 = ram.Allocate(pcb);
var p1Offset = ram.ToPhysicalAddress(10, p1.VirtualAddress);
var p2Offset = ram.ToPhysicalAddress(10, p2.VirtualAddress);
Assert.That(p1Offset, Is.GreaterThan(offset));
Assert.That(p2Offset, Is.GreaterThan(offset));
Assert.That(p2Offset, Is.GreaterThan(p1Offset));
}
//TODO: this doesn't have to be aligned to a page, so allow scenes to use this directly with their ram refs
public void Setup(U16 pageStart, U8 length)
{
_done = VByte.New(Ram, $"{nameof(VRamQueue)}{nameof(_done)}");
_executeLoopContinue = Labels.New();
_executeLoopBreak = Labels.New();
var VRAM = Ram.Allocate(Addr(pageStart), Addr((U16)(pageStart + 0xFF)), "VRAM");
_ops = new List <VRamQueueOp>();
_ops.Add(new NOP());
_opHandlers = new List <Label>();
_liveQueue = LiveQueue.New(Zp, Ram, VRAM, length, $"{nameof(VRamQueue)}{nameof(_liveQueue)}", Op <Stop>()?.Id ?? 255);
}
//TODO: this doesn't have to be aligned to a page, so allow scenes to use this directly with their ram refs
public void SetupAligned(U16 pageStart, U8 length, params Option[] options)
{
_done = VByte.New(Ram, $"{nameof(VRamQueue)}{nameof(_done)}");
//_handlerAddress = VWord.New(ram, "VRamQueue_handlerAddress");
_executeLoopContinue = Labels.New();
_executeLoopBreak = Labels.New();
var VRAM = Ram.Allocate(Addr(pageStart), Addr((U16)(pageStart + 0xFF)), "VRAM");
_liveQueue = LiveQueue.New(Zp, Ram, VRAM, length, $"{nameof(VRamQueue)}{nameof(_liveQueue)}", Op.Stop);
_options = options ?? Array.Empty <Option>();
OptionModules();
}