View Single Post
Old 1st Jan 2018, 2:26 pm   #2
Laurdys
Pentode
 
Laurdys's Avatar
 
Join Date: May 2009
Location: Stockton-on-Tees, County Durham, UK.
Posts: 154
Default Re: 8085 processor questions

I would be tempted to check why the crystal is not oscillating, check the crystal, driver chip, load capacitors .etc (I have known a crystal to fail before in my sinclair ql). if the cpu is not getting a clock signal it won't do anything and the junk on screen could just be indeterminate values from ram powerup.
__________________
If it can be built, it can also be fixed.
Laurdys is offline