FRAM71B

[Erwin]

Hi,

I installed my FRAM71B today with the help of the excellent guide from Sylvain (http://www.hpmuseum.org/forum/thread-5068.html):

• HP41 Translator ROM (16KB+32KB)
• Math ROM (32KB)
• JPC ROM (32KB)
• Backup space (32KB)
• ROM space (32KB) for important progs
• Additional main RAM (160KB). MEM gives me now: 178332 Byte
  

In this installation I can not use my other modules in the now free port slots. I got an error when I put the modules in the free slots cause the address space is occupied.

• Ampistat (32KB)
• Curvefit (32KB)
• Finance (16KB)
• Data Acq (64KB?)
• Textedit (16KB) not so urgent but maybe with the finance module
  

The question is what is the best way to deal with 4 or 5 additional modules in the FRAM71B? The Ampistat and Curvefit should go with the MATHROM. How can I prepare the HP71 for this kind of solution?

Possible solutions:

1. Reduce the amount of RAM when I put 4 external module in the free slots. That means with the above modules, additional 140KB (without the TEXTEDIT) reserved for the ROMs and a free main RAM from about 32KB additional the 2x32KB in Port 5.
2. Or activate and deactivate modules on the FRAM71B, via bank switching and have the whole RAM free. Sylvain gave me a hint for the bank switching in http://hpmuseum.org/forum/thread-6973-po...l#pid62149 but in a first view I'm not able to config my HP71 with the above modules. Therefore it would help me to do this with a similar step by step guide to handle the complex situation. Or could this switching be controlled by a program?
   

I don't have the experience so far what is a reasonable way for my wishes. Maybe solutions are interesting for other less experienced users like me?

regards Erwin