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, 8 insertions, 2 deletions

diff --git a/sw/z80/kernel/process.c b/sw/z80/kernel/process.c
index f33ead6..49b86b8 100644
--- a/sw/z80/kernel/process.c
+++ b/sw/z80/kernel/process.c
@@ -2,9 +2,15 @@
 
 struct process proc_table[255];
 
-int fork(void)
+pid_t newpid(void)
 {
+    static pid_t last_pid = 0;
+    return ++last_pid;
+}
 
+int fork(void)
+{
+    
 }
 
 int exec(char *path, char *args)
@@ -15,4 +21,4 @@ int exec(char *path, char *args)
 int spawn(char *path, char *args)
 {
     
-}
\ No newline at end of file
+}