From bbd419f365d4229094bd33a61dae66bcef0f4370 Mon Sep 17 00:00:00 2001
From: peterferrie <peter.ferrie@gmail.com>
Date: Mon, 24 Nov 2014 10:07:16 -0800
Subject: [PATCH] assert parm count

---
 libsrc/apple2/lseek.s | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libsrc/apple2/lseek.s b/libsrc/apple2/lseek.s
index 058e6f53d..73f4136be 100644
--- a/libsrc/apple2/lseek.s
+++ b/libsrc/apple2/lseek.s
@@ -41,7 +41,7 @@ _lseek:
         bcs     einval
 
         ; Set fd
-        sta     mliparam + MLI::RW::REF_NUM
+        sta     mliparam + MLI::MARK::REF_NUM
 
         txa
         beq     cur
@@ -61,7 +61,9 @@ cur:
 
 ; SEEK_END
 end:
-        ldx     #MARK_COUNT ; conveniently same as EOF_COUNT
+        ; MARK_COUNT must == EOF_COUNT, otherwise unexpected behaviour
+        .assert MARK_COUNT = EOF_COUNT, error
+        ldx     #MARK_COUNT
         jsr     callmli
         bcs     oserr
         lda     mliparam + MLI::MARK::POSITION