Added a note regarding Croc

src/mame/machine/scudsp.c

@@ -64,6 +64,19 @@ Changelog:
 - Convert this to cpu structure
 - Disassembler: complete it
 - Add control flags
+- Croc: has a bug somewhere that never allows it to trip the ENDI opcode.
+Snippet of interest is:
+08	00823500	                                        CLR A     MOV M0,PL
+09	08040000	OR                                      MOV ALU,A
+0A	D208000D	JMP NZ,$D
+0B	00000000	NOP
+0C	F8000000	ENDI
+...
+40	00863502	                                        MOV M0,A  MOV M2,PL
+41	10003009	ADD                                               MOV ALL,MC0
+42	D3400042	JMP T0,$42
+43	00000000	NOP
+44	D0000007	JMP $7
 
 ******************************************************************************************/
 #include "emu.h"