Early (earliest?) HP-41C find.

[Didier Lachieze]

Thanks for the DDD ROMs Diego. I’ve been able to run them in V41.

Comparing the "D" ROM2 with the "E" version I’ve found two code differences:

• The ROM "D" doesn’t include the PATCH5 which is included in ROM "E". From the VASM listing: PATCH5 - POST-RELEASE FIX TO DEL NNN TO MAKE IT WORK WHEN LINE#=000
• There is a significant difference in the PKIO20 part of PKIOAS - PACK I/O BUFFER AREA & KEY ASSIGNMENT AREA AT BOTTOM OF PROGRAM MEMORY.
  

However my M-code expertise is limited and I can’t go further in the change details