create globals.asm with placeholder globals

MEMORY.md

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+# Memory Map
+
+To not have to allocate a ton of things at run time the Standard Library uses a static memory map for some purposes
+
+## Overview
+
+| Start | Use |
+| ---- | ---- |
+| `0x0` | Reset Vector |
+| `0x16` | Zero Page |
+| `0x100` | User Code |
+| `?` | Library Code |
+| `0x1_0000` | LUTs |
+| `?` | heap |
+| `0xXXF0_0000` | Stack |
+| `0xXXFF_0000` | quick access |
+
+## Zero Page
+Some values are needed not often enough to get their own special register, but often enough that it makes sense to keep them at a quickly accessible location.
+This is what the zero page is for. its position in memory allows us to load them into a register with a single instruction.
+

globals.asm

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+jmp 0x100
+
+@0x10
+screen:
+    frambuffer_ptr: U32 0x0
+    size: U32 0x0
+    position_xy: U32 0x0
+    mode: U32 0x0
+
+@0x100