works great!
I have been looking for a way to connect mac plus board to an LCD for a long time, but all methods except for this project did not give a good result without a lot of effort.
I did not order a printed circuit board, for one piece with delivery it turns out to be long and expensive, in a couple of evenings I made it from what was found at home.
milling adapter from XC9572XL VQ44 to pads with 1.27mm (1/20") pitch
View attachment 37812
soldering the old CPLD dismantled from an unnecessary board ...
View attachment 37813
soldering on a breadboard in hamradio style:
View attachment 37814
result:
clicked the buttons, tuned in to the abnormal MAC PLUS output:
HSYNC-Frequency 22.25kHz, 45µs period, 18.45µs low 59% PWM duty cycle
VSYNC-Frequency (Refresh rate) 60.15Hz, 16700µs period, 180µs low 99% PWM duty cycle
DATA 15.6672MHz, 512 pixels in roughly 32.8µs Signal has to be high while no pixels are sent
and a stable image on a 19" monitor with HDMI input:
View attachment 37815