1 files changed, 40 insertions, 0 deletions

diff --git a/v4.0/src/CMD/NLSFUNC/DOESMAC.INC b/v4.0/src/CMD/NLSFUNC/DOESMAC.INC
new file mode 100644
index 0000000..0d98ade
--- /dev/null
+++ b/v4.0/src/CMD/NLSFUNC/DOESMAC.INC
@@ -0,0 +1,40 @@
+CallInstall MACRO   name,mpx,fn,save,restore
+BREAK   MACRO   subtitle
+        SUBTTL  subtitle
+        PAGE
+ENDM
+.xcref  break
+IF Installed
+    IFNB    <save>
+        SaveReg <save>
+    ENDIF
+        MOV     AX,(mpx SHL 8) + fn
+        INT     2Fh
+    IFNB    <restore>
+        RestoreReg  <restore>
+    ENDIF
+ELSE
+        Invoke  name
+ENDIF
+ENDM
+
+BREAK <SaveReg - save a set of registers>
+
+SaveReg MACRO   reglist                 ;; push those registers
+IRP reg,<reglist>
+        ?stackdepth = ?stackdepth + 1
+        PUSH    reg
+ENDM
+ENDM
+.xcref  SaveReg
+
+BREAK <RestoreReg - unsave some registers>
+
+RestoreReg  MACRO   reglist             ;; pop those registers
+IRP reg,<reglist>
+        ?stackdepth = ?stackdepth - 1
+        POP     reg
+ENDM
+ENDM
+.xcref  RestoreReg
+
\ No newline at end of file