Post Reply 
Eprom Modules for the HP 75
08-02-2016, 04:50 PM (This post was last modified: 08-02-2016 05:03 PM by Sylvain Cote.)
Post: #14
RE: Eprom Modules for the HP 75
HP-75 NoMaS Vol.2 P.166 to 168 - The Kangaroo ROM Switching Guide
Contains the explication of the HP-75 ROM enable/disable scheme

Notes ...

The internal routines uses the ROM ID to determine which ROM is active.
A ROM can only contains 1 LEX file and it must be the first file of the ROM.
From comments in the document, it seems that the internal code uses the LEX ID as ROM ID.
ROM ID & LEX ID had to be unique were provided by HP at the time.

Sylvain

edit: added the notes section
Find all posts by this user
Quote this message in a reply
Post Reply 


Messages In This Thread
RE: Eprom Modules for the HP 75 - Sylvain Cote - 08-02-2016 04:50 PM



User(s) browsing this thread: 1 Guest(s)