elaar
New member
Hi all,
I have a TKG3 4-layer donkey kong set. This is ready to go into a cocktail table that I have restored, but there's a major issue; the board seems to output positive video rather than the inverted that Nintendo normally use, which obviously means this displays with a white background and wrong colors on the Sanyo.
This is a genuine Nintendo board. I have scoured the internet and found that on certain Nintendo boards you can convert the entire board to output normal video by simply soldering a jumper (in the case of Mario Brothers), and on other boards they have silkscreened required parts for it.
As this 4 layer board is rather small, there is no silkscreened area for these parts, so I believe it might have been done via jumpers.
On the TKG3-06-CPU board, I found a cut Jumper (J1) that connected to the video circuit, I rejoined this and the background went from white to black (a step closer), but the primary colors were still non-inverted. I therefore believe that there must be a few more jumpers/links to invert the RGB or change the PROM addressing as I have read some Nintendo PROMs contain both inverted and normal color sprites.
Would some kind sole mind taking a hi-res photo of the CPU board so I can compare?
Many thanks,
Andy
I have a TKG3 4-layer donkey kong set. This is ready to go into a cocktail table that I have restored, but there's a major issue; the board seems to output positive video rather than the inverted that Nintendo normally use, which obviously means this displays with a white background and wrong colors on the Sanyo.
This is a genuine Nintendo board. I have scoured the internet and found that on certain Nintendo boards you can convert the entire board to output normal video by simply soldering a jumper (in the case of Mario Brothers), and on other boards they have silkscreened required parts for it.
As this 4 layer board is rather small, there is no silkscreened area for these parts, so I believe it might have been done via jumpers.
On the TKG3-06-CPU board, I found a cut Jumper (J1) that connected to the video circuit, I rejoined this and the background went from white to black (a step closer), but the primary colors were still non-inverted. I therefore believe that there must be a few more jumpers/links to invert the RGB or change the PROM addressing as I have read some Nintendo PROMs contain both inverted and normal color sprites.
Would some kind sole mind taking a hi-res photo of the CPU board so I can compare?
Many thanks,
Andy