add serial device struct

other changes:
  - change from main() to kmain() in crt0.s and kernel.c
  - new file devices.h to define all address locations for devices
  - new data type
      - register_t as volatile uint8_t for registers in devices
      - size_t from libc

1 files changed, 0 insertions, 7 deletions

diff --git a/sw/z80/libc/mem.c b/sw/z80/libc/mem.c
deleted file mode 100644
index 667a752..0000000
--- a/sw/z80/libc/mem.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include "types.h"
-#include "mem.h"
-
-void *malloc(size_t size)
-{
-    :
-}