Is there any specific procedure to allocate one of the HEPAX RAM pages as a ROM image? I would like to build a ROM image using the HEXEDIT program. If the HEPAX resides in 8-B pages would "B" be the page to allocate? Or is this even possible? I am assuming you could break the link in order to isolate this 4k block.
Please let me know.


Take a look at the ram2rom feature (files in the Clonix package)


Hi Jeff,

It is possible to allocate HEPAX memory for other purposes, such as for ROM-creation.

Basically, you have to change the word at address xFF3 to 300h using HEXEDIT, were x denotes one of the pages 8–B. Then, addresses xFE7 and xFE8 have to be 000h. A detailed description can be found in the HEPAX manual Vol. 1, p. 63.

A neat example how to program a user-developed ROM can be found in the HEPAX manual Vol. 2, p. 153.

What Geir described above is the way how to copy the programmed ROM into Page F via ram2rom into the Nov64 system where Page F usually must be flashed, I believe. Thus, it would be the next step after you did your ROM programming.

Best regards


Possibly Related Threads...
Thread Author Replies Views Last Post
  HP-41 MCODE: The Last Function - at last! Ángel Martin 0 719 11-08-2013, 05:11 AM
Last Post: Ángel Martin
  41-MCODE: Auto XEQ+ALPHA possible? Ángel Martin 5 1,394 05-29-2013, 06:15 AM
Last Post: Ángel Martin
  HP 41 Mcode related Questions Michael Fehlhammer 4 1,348 05-10-2013, 07:09 PM
Last Post: Michael Fehlhammer
  HEPAX Revisited: Revision 1E available Ángel Martin 4 1,138 05-03-2013, 01:57 PM
Last Post: Diego Diaz
  NOVRAM 64 / HEPAX bug? M. Joury 2 885 11-03-2012, 02:49 PM
Last Post: M. Joury
  41-MCODE: Breaking the FAT barrier. Ángel Martin 0 676 09-03-2012, 06:31 AM
Last Post: Ángel Martin
  41-MCODE: Dr. Jekyll & Mr. Hyde Ángel Martin 9 2,257 07-09-2012, 09:41 AM
Last Post: Monte Dalrymple
  Beta 41CL --> Best CL UTILs to burn in NoVRAM 64? Gene Wright 5 1,535 07-01-2012, 03:06 PM
Last Post: Matt Kernal
  NoVRAM 64 USB programmer Gene Wright 4 1,277 06-29-2012, 11:43 AM
Last Post: Diego Diaz.
  [41CL] CLUTILS HEPAX Kerem Kapkin (Silicon Valley, CA) 3 1,208 06-06-2012, 10:52 AM
Last Post: M. Joury

Forum Jump: