nlssupt: preserve more registers [fixes #128]

In fdpp, calls to C code may clobber more registers than in freedos. In this particular case DI register was trashed. Some NLS functions, like DosUpChar(), can be called directly by the DOS prog, bypassing the INT21 API. We need to make sure the app's registers are not trashed. Fixes Volkov Commander 4.05.
dosemu2 · Feb 25, 2020 · ca5b05a · ca5b05a
1 parent 9b54289
commit ca5b05a
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/kernel/nlssupt.asm b/kernel/nlssupt.asm
@@ -46,8 +46,8 @@ reloc_call_CharMapSrvc:
                 push    ds
                 push    es
 ;                push    bp
-;                push    si
-;                push    di
+                push    si
+                push    di
                 push    dx
                 push    cx
                 push    bx
@@ -64,8 +64,8 @@ reloc_call_CharMapSrvc:
                 pop     bx
                 pop     cx
                 pop     dx
-;                pop     di
-;                pop     si
+                pop     di
+                pop     si
 ;                pop     bp
                 pop     es
                 pop     ds