Package libsidplay.components.c1541

Klasse C1541

java.lang.Object
libsidplay.components.c1541.C1541
public final class C1541 extends Object
C1541 instance which manages the Floppy CPU and the two VIAs.

Good German documentation on the 1541 floppy can be found at
DieFloppy1541-v4.pdf
or
vc1541_de
Good English ROM listings can be found at
1541dis.html
or
aay1541.txt

TODO Half-tracks are not supported, yet maybe the code looks like it does, but this is not the case.

Autor:
Jörg Jahnke (joergjahnke@users.sourceforge.net), Ken Händel

  • Felddetails

    • ROM_SIZE

      private static final int ROM_SIZE
      Size of the floppy ROM.
      Siehe auch:

    • C1541

      private final byte[] C1541

    • C1541_II

      private final byte[] C1541_II

    • RAM_SIZE

      private static final int RAM_SIZE
      Size of the floppy RAM.
      Siehe auch:

    • RAM_EXP_SIZE

      private static final int RAM_EXP_SIZE
      Size of the floppy RAM expansion.
      Siehe auch:

    • EXP_RAM_BANKS

      private static final int EXP_RAM_BANKS
      Maximum number of activated 8KB Ram expansions.
      Siehe auch:

    • powerOn

      private boolean powerOn
      The disk drive is turned on?

    • id

      private final int id
      Floppy device number (8-11).

    • floppyType

      private FloppyType floppyType
      C1541 or C1541-II?

    • context

      private final EventScheduler context
      Event context.

    • cpu

      private final MOS6510 cpu
      CPU of this device.

    • viaBc

      private final VIA6522BC viaBc
      VIA Bus controller.

    • viaDc

      private final VIA6522DC viaDc
      VIA Disk Controller.

    • ram

      private final byte[] ram
      RAM.

    • rom

      private final byte[] rom
      Simplified, joined ROM image.

    • customC1541Rom

      private byte[] customC1541Rom
      Custom Kernal ROM to be used.

    • ramExpand

      private final byte[][] ramExpand
      Array of 8KB RAM expansions (0x2000-0x3FFF, 0x4000-0x5FFF, 0x6000-0x7FFF, 0x8000-0x9FFF, and 0xA000-0xBFFF).

    • ramExpEnabled

      private final boolean[] ramExpEnabled
      Which RAM expansion is enabled?

    • irqCount

      private int irqCount
      Number of VIA chips asserting IRQ.

    • diskName

      private String diskName

  • Konstruktordetails

    • C1541

      public C1541(IECBus iecBus, int deviceID, FloppyType type, byte[] c1541Bin, byte[] c1541IIBin)
      Create a new C1541 instance.
      Parameter:
      iecBus - IEC bus
      deviceID - floppy device number (8-11)
      type - C1541 or C1541-II?

  • Methodendetails

    • getEventScheduler

      public EventScheduler getEventScheduler()
      Get event scheduler.
      Gibt zurück:
      event scheduler

    • getCPU

      public MOS6510 getCPU()
      Get CPU of the floppy.
      Gibt zurück:
      CPU of this floppy

    • getBusController

      public VIA6522BC getBusController()
      Get Bus controller of this floppy.
      Gibt zurück:
      bus controller of this floppy

    • getDiskController

      public VIA6522DC getDiskController()
      Get disk controller of the floppy.
      Gibt zurück:
      disk controller of this floppy

    • getRAM

      public byte[] getRAM()
      Get RAM of this floppy.
      Gibt zurück:
      RAM of this floppy

    • getROM

      public byte[] getROM()
      Get ROM of this floppy.
      Gibt zurück:
      ROM of this floppy

    • getRAMExpEnabled

      public boolean[] getRAMExpEnabled()
      Is RAM expand enabled of this floppy?
      Gibt zurück:
      RAM expand enabled of this floppy

    • getRAMExpand

      public byte[][] getRAMExpand()
      Is RAM expansion of this floppy?
      Gibt zurück:
      RAM expansion of this floppy

    • getID

      public int getID()
      Return the drive ID.
      Gibt zurück:
      floppy device number (8-11)

    • setPowerOn

      public void setPowerOn(boolean on)
      The floppy has been turned on/off.
      Parameter:
      on - power on?

    • isPowerOn

      public boolean isPowerOn()

    • setFloppyType

      public void setFloppyType(FloppyType type)
      Set the actual type of floppy to be used (change ROM).
      Parameter:
      type - the type of the floppy

    • setRamExpansion

      public void setRamExpansion(int select, boolean expand)
      Enable 8K Ram expansion.
      Parameter:
      select - which 8KB RAM bank to expand (0-5), starting at 0x2000 increasing in 8KB steps up to 0xA000.
      expand - enable 8K Ram expansion

    • signalIRQ

      private void signalIRQ(boolean state)
      Set/clear CPU IRQ state.
      Parameter:
      state - CPU IRQ state

    • reset

      public void reset()
      Reset normally.

    • setRom

      private void setRom()
      Set ROM according to the floppy type.

    • setCustomKernalRom

      public void setCustomKernalRom(byte[] c1541Rom)
      Set a custom Kernal ROM to be used.
      Parameter:
      c1541Rom - kernal Rom (null means default Kernal)

    • getStatus

      public C1541.FloppyStatus getStatus()
      Get a status icon to display the floppies' activity.
      Gibt zurück:
      icon to show

    • getFloppyType

      public FloppyType getFloppyType()

    • getDiskName

      public String getDiskName()

    • setDiskName

      public void setDiskName(String diskName)