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Also I would like to ask about Bob Roberts Notes on the conversion.
http://www.therealbobroberts.net/pp2.html
These notes seem to have stood the test of time.
Does anyone else know of any other notes on the net about this conversion?
That is the standard conversion to go from a PP I to a PP II using the PP I boardset.
It's all lined out in the PP II "Enhancement Manual", but Bob's write-up is much easier to follow.
http://arcarc.xmission.com/PDF_Arca...n_II/Pole_Position_II_TM-255_2nd_Printing.pdf
Be sure to note the differences between a "Namco" boardset and an "Atari" boardset.
Which do you have by the way?
Here's the ROMS that I had been messing with during that previous thread.
We were working with an Atari boardset, so would have to look into whether the same ROM files are completely compatible with a Namco boarset.
The three ROM set includes a modified 4K.
So you burn a new 3L and 4L (2764's) and a new 4K (2716).
Worked fine, but seemed we had graphic issues like there were both Namco and Atari signage during gameplay, can't recall all the details. But it will revive a dead game due to IC25 error caused by the 4K IC.
The two ROM set is supposed to do away with the 4K all together.
So you burn a new 3L and 4L (2764's) and leave out the 4K completely.
Seems like we had problems getting this set to run correctly, but once again I don't recall the details. Worth trying again, but I don't have a machine handy at the moment.
There was another "alternative" that included a DM74S287N piggybacked to a 2716 ROM at location 4K, but I haven't really wanted to get into that monstrosity. Needed to see how the contents of the 287 PROM was programmed to see what it had going on. But honestly, I'd just assume stick to using a modified ROM option before going this route.
I have used the V3 roms in several Pole Pos II boards and haven't noticed any graphics problems, if there are any they must be minor, I have even sent a couple of repaired sets out with V3 roms installed and haven't heard any complaints about them.
Dick
I have used the V3 roms in several Pole Pos II boards and haven't noticed any graphics problems, if there are any they must be minor, I have even sent a couple of repaired sets out with V3 roms installed and haven't heard any complaints about them.
Dick