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I1620: Changed fprint_val to handle undefined opcodes on stops

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This commit is contained in:
Bob Supnik
2017-05-20 14:53:03 -07:00
committed by Mark Pizzolato
parent d60fd322c3
commit 8aa965b293
1 changed files with 8 additions and 2 deletions
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10
I1620/i1620_sys.c
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@@ -1,6 +1,6 @@
/* i1620_sys.c: IBM 1620 simulator interface
Copyright (c) 2002-2015, Robert M. Supnik
Copyright (c) 2002-2017, Robert M. Supnik
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
@@ -23,6 +23,7 @@
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Robert M Supnik.
18-May-17 RMS Changed fprint_val to handle undefined opcodes on stops
19-Mar-12 RMS Fixed declaration of CCT (Mark Pizzolato)
*/
@@ -389,8 +390,13 @@ for (i = 0; opcode[i].str != NULL; i++) { /* find opcode */
((opfl != I_1E) && (opfl != I_0E))))
break;
}
if (opcode[i].str == NULL)
if (opcode[i].str == NULL) { /* invalid opcode */
if ((sw & SIM_SW_STOP) != 0) { /* stop message? */
fprintf (of, "%02d", op); /* print numeric opcode */
return -(INST_LEN - 1); /* report success */
}
return SCPE_ARG;
}
if (I_GETQP (opfl) == I_M_QNP) /* Q no print? */
qmp = 0;