29 lines
1016 B
Plaintext
29 lines
1016 B
Plaintext
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## Memory.jack
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This library provides two services: direct access to the computer's main memory (RAM), and allocation and recycling of memory blocks. The Hack RAM consists of 3840 words, each holding a 16-bit binary number.
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### function void init(int start, int end)
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Initializes the class. First address of heap is start, last address of heap is end.
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### function int peek(int address)
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Returns the RAM value at the given address.
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### function void poke(int address, int value)
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Sets the RAM value at the given address to the given value.
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### function int alloc(int size)
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Finds an available RAM block of the given size and returns a reference to its base address.
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### function void deAlloc(Array o)
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De-allocates the given object (cast as an array) by making it available for future allocations.
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***
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### Project
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* Implement `Memory.jack`
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* Test in simulation:
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```
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$ cd 04_Memory_Test
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$ make
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$ cd ../00_HACK
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$ apio clean
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$ apio sim
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```
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* Check the content of special function register DEBUG0--DEBUG4.
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