you need to apply the following to get it work:

Index: src/emu/inptport.c
===================================================================
--- src/emu/inptport.c (revision 1818)
+++ src/emu/inptport.c (working copy)
@@ -731,6 +731,8 @@

const input_port_config *input_port_config_alloc(const input_port_token *tokens, char *errorbuf, int errorbuflen)
{
+ if (tokens == NULL)
+ return NULL;
if (errorbuf != NULL)
*errorbuf = 0;
return port_config_detokenize(NULL, tokens, errorbuf, errorbuflen);



thanks to Aaron for the quick reply


Roman Scherzer