tezza
Veteran Member
Hi guys,
One of my Dick Smith System 80 machines (TRS-80 Model 1 clone) shows a lot of flicker on the screen, especially when the screen is refreshed a lot such as in this example of Meteor Mission.
Any idea of what might cause this? I was thinking video RAM but diagnostic software shows no fault in the video RAM? Maybe something in the video RAM circuitry though?
The Model 1 circuitry always did have SOME flicker but never to this exent.
Apart from a few cracks in the case this is the only thing wrong with it. I have two other good System 80s which I've been playing with lately, but I'd like to get this one at 100% too, just for the challenge.
Tez
One of my Dick Smith System 80 machines (TRS-80 Model 1 clone) shows a lot of flicker on the screen, especially when the screen is refreshed a lot such as in this example of Meteor Mission.
Any idea of what might cause this? I was thinking video RAM but diagnostic software shows no fault in the video RAM? Maybe something in the video RAM circuitry though?
The Model 1 circuitry always did have SOME flicker but never to this exent.
Apart from a few cracks in the case this is the only thing wrong with it. I have two other good System 80s which I've been playing with lately, but I'd like to get this one at 100% too, just for the challenge.
Tez