Start to try and figure out this ram 132 error by using logic probe on some of the chips before and after the Ram columns. Really don't make any progress .
When the Joust RGB signals are at a 74LS374 which has 3 diode on each output which is only for the Red color, Green color but the BLUE only has 2 outputs and 2 diodes. So the RED and GREEN colors has 3 data bits and the BLUE only has 2 data bits, any reasons why the blue only has 2 data bits and not 3 data bits? look at the Joust schematic
The 74LS374 IC chip in Joust has 3 diodes and 3 resistors which are combining the 3 RED data bits into one data bit. They do the same for the Green data bits. I'm not sure why the designer is combining the 3 red data bits into one data bit but its unusual to use diodes and resistors in parallel combining data bits into one data bit. Check it out on the joust schematic
