public void ConnectTo(Button resetButton, ULA ula, ROM rom, DualAccessMemoryMappedChip ram16K, MemoryMappedChip ram32K)
{
this.resetButton = resetButton;
this.ula = ula;
this.rom = rom;
this.ram16K = ram16K;
this.ram32K = ram32K;
}
public ZXSpectrumComputer()
{
// -- Initialize components --
// System clock
Clock = new _Clock(Clock.FREQ_3_5MHZ);
// Init CPU
CPU = new _Z80CPU();
// Reset button
ResetButton = new Button(SignalState.HIGH);
// ZX Spectrum memory map
/// NB : in the real machine, there is also a multiplexed address bus for each device :
/// select row (7 bits) then select colum (7bits).
/// Row and column address strobe - RAS/CAS - signals must therefore be generated.
/// We do not simulate theses details here, as they are complex to understand
/// and can be ignored without losing any fildelity to the behavior of the machine.
// 16K ROM
// 0 - 16383 : ROM Program
ROM = new _ROM();
// 16K RAM
// 16384 - 23295 : Video display memory (6910 bytes)
// 23296 - : System variables
// User programs
RAM16K = new _DualAccessMemoryMappedChip(Memory.BYTES_16K, 0x4000);
// 32K RAM (only in 48K models)
RAM32K = new _MemoryMappedChip(Memory.BYTES_32K, 0x8000);
// Initialize ULA :
// Video generator
// CPU clock generator
// Memory access governor
// Keyboard controller
// Tape I/O controller
// Speaker controller
ULA = new _ULA();
// Initialize peripherals
Keyboard = new _Keyboard();
Screen = new _Screen();
Speaker = new _Speaker();
TapeRecorder = new _TapeRecorder();
// Initialize Sinclair joysticks
Joystick1 = new Joystick(true, Keyboard);
Joystick2 = new Joystick(false, Keyboard);
// -- Initialize and connect system buses --
// CPU buses
AddressBus = new Bus<ushort>();
DataBus = new Bus<byte>();
CPU.Address.ConnectTo(AddressBus);
CPU.Data.ConnectTo(DataBus);
ROM.Address.ConnectTo(AddressBus);
ROM.Data.ConnectTo(DataBus);
RAM16K.AddressInput1.ConnectTo(AddressBus);
RAM16K.DataInput1.ConnectTo(DataBus);
RAM32K.Address.ConnectTo(AddressBus);
RAM32K.Data.ConnectTo(DataBus);
ULA.Address.ConnectTo(AddressBus);
ULA.Data.ConnectTo(DataBus);
// Dedicated video buses : firect Video Memory Access for the ULA
VideoAddressBus = new Bus<ushort>();
VideoDataBus = new Bus<byte>();
ULA.VideoAddress.ConnectTo(VideoAddressBus);
ULA.VideoData.ConnectTo(VideoDataBus);
RAM16K.AddressInput2.ConnectTo(VideoAddressBus);
RAM16K.DataInput2.ConnectTo(VideoDataBus);
// Connect Keyboard to the ULA
KeyboardDataBus = new Bus<byte>();
ULA.KeyboardData.ConnectTo(KeyboardDataBus);
Keyboard.Address.ConnectTo(AddressBus);
Keyboard.Data.ConnectTo(KeyboardDataBus);
// Connect ULA analog video signal to screen
ULA.ColorSignal.ConnectTo(Screen.ColorSignal);
// Connect tape recorder sound output to ULA
TapeRecorder.SoundSignal.ConnectTo(ULA.TapeInputSignal);
// Connect ULA sound output to the speaker
ULA.SpeakerSoundSignal.ConnectTo(Speaker.SoundSignal);
// -- Connect individual PINs --
((_Clock)Clock).ConnectTo(ULA, Screen, TapeRecorder);
((_Z80CPU)CPU).ConnectTo(ResetButton, ULA, ROM, RAM16K, RAM32K);
((_ROM)ROM).ConnectTo(CPU);
((_DualAccessMemoryMappedChip)RAM16K).ConnectTo(CPU, ULA);
((_MemoryMappedChip)RAM32K).ConnectTo(CPU);
((_ULA)ULA).ConnectTo(Clock, CPU, RAM16K, Keyboard, Screen, Speaker);
((_Keyboard)Keyboard).ConnectTo(ULA);
((_Screen)Screen).ConnectTo(ULA);
((_Speaker)Speaker).ConnectTo(ULA);
((_TapeRecorder)TapeRecorder).ConnectTo(Clock);
}
