devsys: note a Z80 assumption to fix

diff --git a/Kernel/devsys.c b/Kernel/devsys.c
index 91d2aa0..fe05ee2 100644 (file)
--- a/Kernel/devsys.c
+++ b/Kernel/devsys.c
@@ -52,6 +52,7 @@ int sys_write(uint8_t minor, uint8_t rawflag, uint8_t flag)
   case 2:
     return udata.u_count;
   case 1:
+    /* FIXME: this needs to be a per CPU value */
     if (udata.u_offset < 0x0100) {
       udata.u_error = EPERM;
       return -1;