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CPM OPERATING SYSTEMS/CPM 2.X/CPM 2.2/PATCHES/PIP-XSUB.PAT

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+
+Conflict with XSUB and MBASIC or PIP
+-----
+
+        Question:  Why do I have problems using XSUB with some programs, in
+particular MBASIC and PIP?
+
+        Answer:  Any program, like MBASIC, that uses single character input
+or direct console i/o cannot work with XSUB which only supplies console
+buffer input.
+
+        PIP commands can be given by XSUB but CON: input cannot.  Another
+problem with PIP is that you cannot exit with just a RETURN since SUBMIT
+does not allow blank lines.  The following patch will allow PIP to be exited
+with either a RETURN or any single character (usually a period) followed by
+a RETURN.
+
+A>ddt pip.com
+DDT VERS 2.2
+NEXT  PC
+1E00 0100
+-a54f
+054f  cpi 2
+0551  jnc 55e
+0554
+-g0
+A>save 29 pip.com
+