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java.lang.Objectmachine.AbstractMainMemory.Port
public class AbstractMainMemory.Port
Memory's port for reading and writing. This is the interface the memory presents to the CPU.
| Constructor Summary | |
|---|---|
AbstractMainMemory.Port()
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| Method Summary | |
|---|---|
UnsignedByte[] |
read(int address,
int length)
Read a sequence of bytes from memory using an aligned address. |
int |
readInteger(int address)
Read a 4-byte integer from memory using an aligned address. |
int |
readIntegerUnaligned(int address)
Read a 4-byte integer from memory using a possibly-unaligned address. |
UnsignedByte[] |
readUnaliged(int address,
int length)
Read a sequence of bytes from memory using a possibly-unaligned address. |
void |
write(int address,
UnsignedByte[] value)
Write a sequence of bytes to memory using an aligned address. |
void |
writeInteger(int address,
int value)
Write a 4-byte integer to memory using an aligned address. |
void |
writeIntegerUnaligned(int address,
int value)
Write a 4-byte integer to memory using a possibly-unaligned address. |
void |
writeUnaligned(int address,
UnsignedByte[] value)
Write a sequence of bytes to memory using a possibly-unaligned address. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public AbstractMainMemory.Port()
| Method Detail |
|---|
public UnsignedByte[] read(int address,
int length)
throws AbstractMainMemory.InvalidAddressException
address - address of first byte.length - number of bytes.
InvalidMemoryException - if any address in the range address to address+length-1 is out of range or if address % length != 0 (i.e., address is not aligned to length).
AbstractMainMemory.InvalidAddressException
public UnsignedByte[] readUnaliged(int address,
int length)
throws AbstractMainMemory.InvalidAddressException
address - address of first byte.length - number of bytes.
InvalidMemoryException - if any address in the range address to address+length-1 is out of range.
AbstractMainMemory.InvalidAddressException
public int readInteger(int address)
throws AbstractMainMemory.InvalidAddressException
address - address of first byte.
InvalidMemoryException - if any address in the range address to address+3 is out of range or if address % 4 != 0 (i.e., address is not aligned to length).
AbstractMainMemory.InvalidAddressException
public int readIntegerUnaligned(int address)
throws AbstractMainMemory.InvalidAddressException
address - address of first byte.
InvalidMemoryException - if any address in the range address to address+3 is out of range.
AbstractMainMemory.InvalidAddressException
public void write(int address,
UnsignedByte[] value)
throws AbstractMainMemory.InvalidAddressException
address - address of first byte.value - array of bytes to write into memory.
InvalidMemoryException - if any address in the range address to address+value.length-1 is out of range or if address % length != 0 (i.e., address is not aligned to length).
AbstractMainMemory.InvalidAddressException
public void writeUnaligned(int address,
UnsignedByte[] value)
throws AbstractMainMemory.InvalidAddressException
address - address of first byte.value - array of bytes to write into memory.
InvalidMemoryException - if any address in the range address to address+value.length-1 is out of range.
AbstractMainMemory.InvalidAddressException
public void writeInteger(int address,
int value)
throws AbstractMainMemory.InvalidAddressException
address - address of first byte.value - integer to write into memory.
InvalidMemoryException - if any address in the range address to address+3 is out of range or if address % 4 != 0 (i.e., address is not aligned to length).
AbstractMainMemory.InvalidAddressException
public void writeIntegerUnaligned(int address,
int value)
throws AbstractMainMemory.InvalidAddressException
address - address of first byte.value - integer to write into memory.
InvalidMemoryException - if any address in the range address to address+3 is out of range.
AbstractMainMemory.InvalidAddressException
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