dev: growing this into the Zone OS project

The scope of this project is growing, mostly for fun. I doubt
I'll ever get to the point where I can actually use it on a real
Z80 system, but who knows. Mostly this is a good way to learn
about vasm and refresh my Z80 assembly knowledge.

linker.cmd

@@ -1,6 +1,10 @@
+# SPDX-License-Identifier: MPL-2.0
 SECTIONS
 {
-  .text  0xE000 : { *(.text) }
-  .data  0x7000 : { *(.data) }
-  .bss         : { *(.bss)  }
+  .zone     0xA000 : { *(.zone) *(zone) }
+  .text     0xE000 : { *(.text) }
+  .float    0xE000 : { *(.float) *(float) }
+  .vectors  0xF000 : { *(.vectors) }
+  .data     0x7000 : { *(.data) }
+  .bss            : { *(.bss)  }
 }