The MemoryPagingInfo class
This class provides properties and methods to obtain information about ROM and RAM paging. Though it works with ZX Spectrum 48K model, it provides benefits only for higher models.
Namespace: Spect.Net.SpectrumEmu.Scripting
Assembly: Spect.Net.SpectrumEmu
public sealed class MemoryPagingInfo
SelectedRomIndex
public int SelectedRomIndex { get; }
Gets the index of the currently selected ROM.
SelectedRamBankIndex
public int SelectedRamBankIndex { get; }
Gets the index of the selecter RAM bank for the #C000-#FFFF address range.
GetBankIndexForSlot(int)
public int GetBankIndexForSlot(int slot)
Gets the RAM bank index for the specified slot.
There are four slots, for the pages starting at
#0000,#4000,#8000, and#C000, respectively. Slot index should be set accordingly, from0to3.
UsesShadowScreen
public bool UsesShadowScreen { get; }
Indicates if the virtual machine uses the shadow screen (Bit 3 of port #7FFD). If false, the normal screen (Bank #5) is used. If true, the shadow screen (Bank #7) is displayed.
IsInAllRamMode
public bool IsInAllRamMode { get; }
Indicates if the virtul machine (ZX Spectrum +3E and ZX Spectrum Next) machine is in the special ALL RAM mode (Bit 0 of port #1FFD).
The MemorySlice class
This class represents a slice of the memory in the Spectrum virtual machine. Right now, it is used to represent the contents of a RAM bank.
Namespace: Spect.Net.SpectrumEmu.Scripting
Assembly: Spect.Net.SpectrumEmu
public sealed class MemorySlice
Size
public int Size { get; }
The size of the memory slice, given in number of bytes.
this[int]
public byte this[int index] { get; set; }
You can get and set the byte at the index position in the memory slice.
Be aware,
indexis not the absolute memory address of the byte, but a relative address from0toSize - 1. For RAM banks,Sizeis#4000, thus you can address bytes from0to#3FFF.
The ReadOnlyMemorySlice class
This class represents a read-only slice of the memory in the Spectrum virtual machine. Right now, it is used to represent the contents of a ROM pages.
Namespace: Spect.Net.SpectrumEmu.Scripting
Assembly: Spect.Net.SpectrumEmu
public sealed class ReadOnlyMemorySlice
Size
public int Size { get; }
The size of the memory slice, given in number of bytes.
this[int]
public byte this[int index] { get; }
You can get the byte at the index position in the memory slice. As the name of the class suggest,
you cannot change the contents of a read-only memory slice.
Be aware,
indexis not the absolute memory address of the byte, but a relative address from0toSize - 1. For RAM banks,Sizeis#4000, thus you can address bytes from0to#3FFF.
The SpectrumMemoryContents class
This class provides access to the addressable 64KBytes memory contents of the Spectrum virtual machine. An instance of the class allows reading and writeng the memory.
Namespace: Spect.Net.SpectrumEmu.Scripting
Assembly: Spect.Net.SpectrumEmu
public sealed class SpectrumMemoryContents
this[ushort]
public byte this[ushort address] { get; set; }
Gets or sets the contents of the specified address. Setting the content behaves as
in the real hardware: if you try to set a ROM address, the contents of the particular
memory address won’t change after the write operation.
ReadTrackingState
public AddressTrackingState ReadTrackingState { get; }
The property’s value is an AddressTrackingState
instance. It provides a bit for each memory address in the #0000-#FFFF range to check if the
particular byte in the memory has been read during a CPU operation.
ResetReadTracking()
public void ResetReadTracking()
Resets the ReadTrackingState property as if no memory had been read.
WriteTrackingState
public AddressTrackingState WriteTrackingState { get; }
The property’s value is an AddressTrackingState
instance. It provides a bit for each memory address in the #0000-#FFFF range to check if the
particular byte in the memory has been written during a CPU operation.
ResetWriteTracking()
public void ResetWriteTracking()
Resets the WriteTrackingState property as if no memory had been read.