mykrowyre
Experienced Member
I recently received an original Tandy Hires board for my Model 4.
Unfortunately I am getting two columns (always same two) of garbage which change in bit pattern as the screen is being written to.
The entire column will be characters of the same pattern.
I thought maybe one of the ram chips on the board might be bad, but I can't find any reference for those chips.
Part number QD8418F.
I believe they are 8K motorola chips (4 of them).
What do you think, ever seen this before?
Unfortunately I am getting two columns (always same two) of garbage which change in bit pattern as the screen is being written to.
The entire column will be characters of the same pattern.
I thought maybe one of the ram chips on the board might be bad, but I can't find any reference for those chips.
Part number QD8418F.
I believe they are 8K motorola chips (4 of them).
What do you think, ever seen this before?
