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--- public:calculator:guides:dm41_snippets [08/04/24 00:53 BST] – [Example] john
+++ public:calculator:guides:dm41_snippets [19/01/26 07:30 GMT] (current) – [Module Switching] john
@@ Line 2: / Line 2: @@
-====== DM41X Snippets ======
+====== DM41X Hints & Tips ======
+===== Module Switching =====
+Using the [[dm41x_ladybug_module| Ladybug module]] for Integer/Base calculations means it's impossible to also have the [[41z_module| 41Z complex number module]] or the [[hp16c_emulator| HP16C simulator module]] and the necessary library "plugged in" at the same time. There is a clash between ''Library 4'' needed for ''41z'' (and also needed for ''16C'') and ''OS/4'' which is needed for ''Ladybug''.
+I've used the DM41X "module save/load" function to have different module-plugged states:
+  * ''41z.m41'' : with ''41Z 2x2 Deluxe'' and ''Library 4'' modules active
+  * ''16c.m41'' : with ''HP16 C Simulator'' and ''Library 4'' modules active
+  * ''lady.m41'' : with ''Boost'', ''OS/4'' and ''Ladybug'' modules active
+  * ''adv.m41'' : with ''Advantage Pac'' module active
+These are accessed via ''setup'' -> ''2. Module'' -> ''4. Load Modules'' -> ''1. Load AM list''
+Choosing the required *.m41 file will automatically unplug/plug whichever modules were active when the config. was saved.
+This makes it easier to remember which supporting library/module are needed to use each particular module's functions.
+It's possible to also save the ''flash'' state - which modules have been pre-loaded into the DM41X's Flash Memory making them //available// to be //plugged in// using different options at the ''setup'' ''2. Module'' choices.... you'll work it out.
+===== Advantage Pac : Flag 21 =====
+I found that using some of the Advantage Pac programs (e.g. ''MATRX'' or ''CFIT'') would lead to ''AVIEW'' instructions in programs run subsequently to cause a ''HALT'' - requiring use of the <key>R/S</key> key.
+I was told via a question on the [[https://forum.swissmicros.com/viewforum.php?f=24 | Swiss Micros Forum ]] that this was likely to be due to the Advantage Pac setting ''FLAG 21'' (printer active) to help in its own presentation of information on the display.
+''FLAG 21'' SET while ''FLAG 55'' is CLEAR (since there's no Printer Module active) causes AVIEW instructions to halt awaiting user intervention (<key>R/S</key> key)
+To restore things to //normal// : either ''CLEAR'' Flag 21 via ''CF'' or simply turn the calculator off and on again.
+See APPENDIX D in the HP41CX User Manual Volume 2 for a better explanation of the use of Flag 21 to control ''AVIEW'' behaviour.
 ===== Extended Memory =====
@@ Line 23: / Line 59: @@
   * enter 1<sup>st</sup> date into Y-stack as ''dd.mmyyyy''
   * key in 2<sup>nd</sup> date into X-stack as ''dd.mmyyyy''
-  * <key>XEQ</key> <key>ALPHA</key> <key>D</key> <key>D</key> <key>'A'</key> <key>Y</key> <key>S</key> <key>ALPHA</key>
+  * <key>XEQ</key> <key>ALPHA</key> <key>D</key> <key>D</key> <key>'A'</key> <key>Y</key> <key>'S'</key> <key>ALPHA</key>
   * result is the difference in days.
   * ''DDAYS'' can be added to the ''CST'' program chooser to make it easier if multiple calculations are required
@@ Line 32: / Line 68: @@
 ''27.021966'' <key>ENTER</key>
-''31.052022'' <key>XEQ</key> <key>ALPHA</key> <key>D</key> <key>D</key> <key>'A'</key> <key>Y</key> <key>S</key> <key>ALPHA</key>
+''31.052022'' <key>XEQ</key> <key>ALPHA</key> <key>D</key> <key>D</key> <key>'A'</key> <key>Y</key> <key>'S'</key> <key>ALPHA</key>
 Result = ''20,547''