Drivers updated, bad 74HC139’s
Tuesday, October 13th, 2009I’ve updated all three drivers (VGA, SVGA and XGA) as well as the Life demo - you can find the new versions on the Downloads page.
The update is only needed for people who are running Morpheus with a Mem+ board, and was needed to allow for longer switching times between READ and WRITE and ALE commands in plotpixel.
I have also found that I had some 74HC139 chips that were not fast enough for Morpheus - if you see a vertical bar about 1/4 to 1/3rd of the way across the screen you likely need a new, faster, 74HC139.
If you purchased a full kit from me and have an affected part (series P9712AH, MM74HC139N or MC74HC139N) that exhibits this problem, please send me an email and I will send you an STMicro 74HC139 which does not exhibit this issue.