diff --git a/kernal/cbm/channel/channel.s b/kernal/cbm/channel/channel.s
index 82c68a55..204ba21c 100644
--- a/kernal/cbm/channel/channel.s
+++ b/kernal/cbm/channel/channel.s
@@ -96,7 +96,7 @@ untlk = $ffab
 
 ; misc x16 additions
 .export clear_status
-.export get_fa
+.export extapi_getlfs
 
 
 .segment "ZPCHANNEL" : zeropage
diff --git a/kernal/cbm/channel/x16additions.s b/kernal/cbm/channel/x16additions.s
index f0aca83d..027ee866 100644
--- a/kernal/cbm/channel/x16additions.s
+++ b/kernal/cbm/channel/x16additions.s
@@ -3,6 +3,8 @@ clear_status:
     stz status
     rts
 
-get_fa:
-    lda fa
+extapi_getlfs:
+    lda la
+    ldx fa
+    ldy sa
     rts
diff --git a/kernal/x16/extapi.s b/kernal/x16/extapi.s
index a6fd6c62..6271c441 100644
--- a/kernal/x16/extapi.s
+++ b/kernal/x16/extapi.s
@@ -1,11 +1,12 @@
 .import clear_status
-.import get_fa
+.import extapi_getlfs
 
 .export extapi
 
 .segment "UTIL"
 
-; This API call expects and requires e=1
+; This API call expects and requires
+; m=1,x=1,sp=$01xx (or e=1)
 extapi:
     pha ; reserve two free spots on the stack
     pha
@@ -31,5 +32,5 @@ secrts:
 apitbl:
     .word secrts-1 ; slot 0 is reserved
     .word clear_status-1      ; API 1
-    .word get_fa-1            ; API 2
+    .word extapi_getlfs-1     ; API 2