Last visit was: Wed Sep 03, 2025 3:58 pm
It is currently Wed Sep 03, 2025 3:58 pm



 [ 1 post ] 
 Bootstrapping without ROM, using NMI 
Author Message
Online

Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1838
This article describes the loading of a bootstrap program into RAM purely by manipulating the timing of NMIs, on a Z80. The idea is that NMI pushes the current address onto the stack, and if you first fill memory with NOPs or similar, you can push any desired value. I'd like to understand this better and have a clearer description, but here's the doc:
http://www.jdm.homepage.dk/z80boot.htm
Edit: now found at http://www.z80.info/jmz8boot.htm

"Bootloading Z80 using NMI, RESET and CLOCK."

Cheers
Ed


Sat Feb 22, 2014 12:56 pm
 [ 1 post ] 

Who is online

Users browsing this forum: claudebot, SemrushBot and 0 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
Designed by ST Software