NoV-64: FOCAL access to switching RAM blocks
#1

Finally; the quest for my own holy grail is complete: The ICEBOX.ROM.

Ever since I got the NoV-32 and now lately NoV-64, I have wanted a way to automatically switch the RAM blocks via a FOCAL program. Having searched for a ROM that makes this possible, the conclusion was that no such ROM exists. So, I looked at many of the really good ROMs out there to find one that I could modify. The choice became Angell Martin's TOOLBOX.ROM. With help from Peter Platzer, I got the SRC file, got up to speed on the SDK41 (thanks Warren Furlow) and added RROM (read the value of any address) and WROM (write a value to HEPAX or other MLDL RAM). The last one makes it possible to write the appropriate value to the address 4100 that governs which RAM block is active.

You will find the ICEBOX.ROM and its source file at the UC-41 website as well as a FOCAL program that shows how to use the functions to automate the block switching.

Hope this is of use to anyone.

A big thanks to Diego Diaz for keeping the HP-41 my primary tech interest :-)



Possibly Related Threads…
Thread Author Replies Views Last Post
  42S with nonvolatile RAM Lyuka 5 2,911 12-13-2013, 08:52 AM
Last Post: Lyuka
  HP 50g switching two keys in the user keyboard Sean Freeman 9 3,875 12-05-2013, 11:44 AM
Last Post: Mark Puscas
  HP-41(CL): The easiest way to transfer FOCAL programs from a Linux PC to the HP-41 Geir Isene 13 5,560 12-05-2013, 02:40 AM
Last Post: Hans Brueggemann
  HP-41 Clonix&NoV's SW Update. (For the non-Primer's guys out there... :-) Diego Diaz 21 5,628 11-13-2013, 09:00 AM
Last Post: Ángel Martin
  HP Prime - RPN stack access from programs? Mike Mander (Canada) 10 3,296 09-30-2013, 11:20 AM
Last Post: steindid
  Best way to test HP-71B RAM modules (the 32K/96K ones etc.)? Philippe Lasnier 4 2,352 09-25-2013, 09:54 AM
Last Post: Philippe Lasnier
  HP 2225D+ RAM failure/replacement Luca 4 1,886 09-10-2013, 01:46 PM
Last Post: Luca
  Questions about building a RAM card for hp 48 Waon Shinyoe (China) 0 1,085 07-09-2013, 09:53 PM
Last Post: Waon Shinyoe (China)
  HP-41CL & NoV(-64): Race condition? Geir Isene 11 3,255 05-03-2013, 01:59 PM
Last Post: Diego Diaz
  Latest Clonix/NoV's SW update. Diego Diaz 5 2,109 02-15-2013, 12:12 PM
Last Post: Ángel Martin

Forum Jump: