filesystem structure intro and docs

- new type pid_t and program management mechanism to make it
  easier to switch to a multitasking kernel
- new memory related functions in memory.h to move, copy and
  manage pages
- fix typos

1 files changed, 1 insertions, 1 deletions

diff --git a/sw/z80/kernel/include/memory.h b/sw/z80/kernel/include/memory.h
index 5bca5a5..e4352b5 100644
--- a/sw/z80/kernel/include/memory.h
+++ b/sw/z80/kernel/include/memory.h
@@ -34,7 +34,7 @@
 struct page
 {
 	uint used :1;
-	uint8_t pid;     // process owner of the page
+	pid_t pid;     // process owner of the page
     uint16_t addr;   // physical address
 };