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Added a memory layout in a table. Might require some extra info

Kevin Ramharak 2017-12-29 01:47:28 +01:00
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CPU.md

@ -15,6 +15,15 @@ Work in progress
From a storage point of view, the CPU memory spaces are organized as identical arrays of 16-bit words. The CPU has access to its full address space: 65536 (0x10000) words of memory (total 128KB). By default, the stack base is at address 0xFFFF and grows towards lower addresses. From a storage point of view, the CPU memory spaces are organized as identical arrays of 16-bit words. The CPU has access to its full address space: 65536 (0x10000) words of memory (total 128KB). By default, the stack base is at address 0xFFFF and grows towards lower addresses.
The memory represented in a table would look like this:
| Address | Description |
| ------- | ----------- |
| `0x0000 - 0x00FF` | Memory used by the [LiDAR](https://github.com/simon987/Much-Assembly-Required/wiki/Hardware:-LiDAR#interrupt-behavior) `GET_PATH` hardware interrupt behavior |
| `0x0100 - 0x01FF` | Memory used by the [LiDAR](https://github.com/simon987/Much-Assembly-Required/wiki/Hardware:-LiDAR#interrupt-behavior) `GET_MAP` hardware interrupt behavior |
| `0x0200 - 0x0200 + PROGRAM_SIZE` | The instructions that make up your program |
| `...`| Not assigned to anything |
| `0x.... - 0xFFFF` | The start of your stack, pointed to by the BP Register at the start of your program. This grows towards `0x0000` |
## General purpose registers ## General purpose registers
The registers are 16-bits locations available to the CPU and are used in some instructions and system calls. Read [Basic Assembly Tutorial](https://github.com/simon987/Much-Assembly-Required/wiki/Basic-Assembly-tutorial) for more information. The registers are 16-bits locations available to the CPU and are used in some instructions and system calls. Read [Basic Assembly Tutorial](https://github.com/simon987/Much-Assembly-Required/wiki/Basic-Assembly-tutorial) for more information.