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Old 24th Feb 2021, 10:21 pm   #659
ScottishColin
Octode
 
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,762
Default Re: Non-working Commodore PET 3016

I measured AB0-AB15 at the 6502 pins and at the right hand side of their destinations of UB3 and UC3.

Each one has exactly the same frequency from the 6502 to UB3/UC3. Each one has exactly the same wave form at the 6502 pins as at UB3 and UC3.

Colin.

Quote:
Originally Posted by SiriusHardware View Post
Yes, if you follow those lines from those ICs you will see they are labelled BA0 to BA15, 'BA' standing for 'Buffered Address'.

By 'Sweep Time' Mark means the time the scope trace takes to travel from left to right across the screen, controlled by the 'Time / Div' or Horizontal control on your scope's front panel.
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