Template:FUNU changes for 7.5

Starting with version 7.5 of Model 204, all $functions are entered in AMODE 64. This requires you to modify the ENTER macro for each $function, and may require you to modify the code for proper addressing in AMODE 64.

• The default ENTER macro (that is, without the ZMODE= operand) will not function in AMODE 64 - it will issue a BUG message (label Bad AMODE, expect 31) and produce a snap.
• In order to exploit QTBL above the 2G bar, any $functions which has arguments must be in AMODE 64. The ENTER macro should use ZMODE=GQ (the AMODE will remain as 64) and the code must be changed for proper addressing.
• If the $function does not have any arguments or if you will not exploit QTBL above the bar, and if your $function does not access any other data structures which may be above the bar, you can use the ZMODE=31 operand on the ENTER macro. This will cause your $function to switch to AMODE 31 at entry (and restore the AMODE upon exit).
• In any case, the AMODE issues need to be accounted for in any routines which your $function routine does a CCALL to.