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GXemul: Components: ram

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Back to the component index.


ram component

The ram component represents a Random Access Memory.

Note that also ROM (Read-Only Memory) circuits are emulated using this component. A ROM circuit is a RAM with writeProtect = true.

The following example shows how to interactively add a ram component to a machine:

$ gxemul -V
..
GXemul> add machine
GXemul> add mainbus machine0
GXemul> root
  root
  \-- machine0
      \-- mainbus0

  accuracy = cycle
  step     = 0
GXemul> add ram mainbus0
GXemul> ram
  ram0  (0 bytes at offset 0)

  data                = (custom)
  lastDumpAddr        = 0
  memoryMappedAddrMul = 0x1
  memoryMappedBase    = 0
  memoryMappedSize    = 0
  step                = 0
  writeProtect        = false
GXemul> ram0.memoryMappedSize = 0x400000
GXemul> root
  root
  \-- machine0
      \-- mainbus0
          \-- ram0  (4 MB at offset 0)

  accuracy = cycle
  step     = 0
GXemul> 

Source code for this component can be found here (and Doxygen documentation here).