z280rc: note zz80rc difference

diff --git a/Kernel/platform-z280rc/crt0.s b/Kernel/platform-z280rc/crt0.s
index d93868a..b2ddef0 100644 (file)
--- a/Kernel/platform-z280rc/crt0.s
+++ b/Kernel/platform-z280rc/crt0.s
@@ -41,6 +41,11 @@
                ; We are executed as a CP/M task identity mapped into the
                ; low 64K. Nice and simple. We just expand ourselves all
                ; over CP/M and take over.
+               ;
+               ; If we also want to support ZZ80RC we need to rework
+               ; stuff a bit because it has page 0 borrowed for the
+               ; firmware and reboot so we can't use it. Also it starts
+               ; with the MMU already on and us mapped differently.
 start:
                di
                ld sp, #kstack_top