/************************** I2ICE TUTORIAL SCREEN #45 **************************/
menu=1
define literally P   = 'include scr.44 nolist'
define literally R   = 'include scr.45 nolist'
define literally RTN = 'include scr.45 nolist'
define literally N   = 'include scr.46 nolist'
define literally M   = 'include scr.2 nolist'
cls
/*******************************************************************************/
'                                                     ------------------------'
'A moment''s reflection reveals the problem.  Array   | SCR45: BYTE            |'
'subscripts in PL/M-86 begin at 0; so, a five-       | M = Go to main menu    |'
'element array can have a maximum subscript of 4.    | N = Next screen        |'
'When emulation occurs and the array subscript is    | P = Previous screen    |'
'incremented to 5, the memory address pointer moves  | Q = Quit tutorial      |'
'beyond the end of the array to a memory location    | R = Rewrite SCR45      |'
'used for something else--a location that by chance  | SCR# = Screen desired  |'
'has the value 31 (hex) in it.  The 31 is then writ-  ------------------------'
'ten to DECIMAL_DIGIT and creates our problem.       '
' '
'We can confirm this diagnosis by looking at the value stored at the address'
'for DIGIT_STACK[4] (which should be 01) and at the next address.  We could do'
'this with the following commands:  WRITE_DECIMAL.DIGIT_STACK[4];WRITE_DECIMAL'
'.DIGIT_STACK[5].  However, there is another way to display these memory bytes.'
'We can use one of the commands that displays memory: BYTE.'
' '
'In the following command, the period before the array name directs the I2ICE'
'software to use the address--rather than the value--of the given array ele-'
'ment.  Enter the following command:'
'    BYTE .:CMAKER.WRITE_DECIMAL.DIGIT_STACK[4] LENGTH 2 <Enter>'
'---- For information on BYTE and other memory commands, enter MOD_P <Enter>--'