FS : Radar Scope PCB.....

ballytablewiz

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Radar Scope PCB, with a catch : It's been converted to play DKJR!?!

So we all know that Radar Scope's were famously converted into Donkey Kong's. And some also know that DK and DKJR share the same VIDEO PCB, and much of the same TTL logic. So obviously some crafty operator BITD had a Donkey Kong that he wanted to play DKJR on, and he made some modifications to this PCB to make that happen...

I got the board as a sort of basket case, missing interboard connect cables, missing CPU, and boards separated in a pile. It was labeled as a DKJR, which I found odd. I also noticed some curious work had been done, namely that a couple of the EPROMs on the CPU board had others stacked on top of them, soldered into sockets on top of the existing chips. And some legs of a few ICs have been desoldered, lifted, and tracer re-routed into new circuits. I was scared. Upon closer inspection, the modifications appear professional and have been done very carefully, not damaging the board or chips involved. So I loaded it up with a fresh new CPU, slapped some interboard cables on it, and fired it up. It friggin' WORKS! It plays Donkey Kong Jr!?!

Now, the audio isn't playing music, only a couple simple sounds for walking and jumping. I don't know if this conversion was meant to play music (is DK/RS hardware even capable of playing DKJR sounds and music, since JR used some different audio hardware?), or if something is awry. I also don't care.

This PCB could be de-converted back into a Donkey Kong (which it WAS at one time, because some of the EPROM labels can be seen to show TKG's), or you can take it all the way back to a Radar Scope. The EPROMs on the VIDEO PCB have Radar Scope (TRS) labels on them, I assume they have been erased and reburned into JR code, but there they are. An average tech could take on this deconversion - I could easily do it - but again, I just don't care. I have no desire to own or play a Radar Scope, and I'm not investing in a PROM set and reburning the EPROMs to make it into a board I don't care about. I did my share just finding, reconstituting, and getting it back to living status :p

My testing has proven that we have a working CPU, VIDEO, and CLK boards, the SOU board's health cannot be determined in it's current form. The original pots are in place on the (unmodified) CLK board, one of them is missing the plastic knob, but works with a screwdriver. The other (V-Pos) pot is super touchy, could probably use a replacement.


This board is sold AS-IS, I will not help you with it nor accept it back in return.

*SOLD*

.
 

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Moar pics...
 

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dk

hey, do you think it may play both?... try holding down the player 1 and 2 and see if it might switch over!!!
 
This would be good for someone with a TKG2 Donkey Kong. Tough to find a working board.
 
Sent you a PM, forgot to post here that I did...I might be interested. Details were in the PM. Thanks :)
 
I'm not sure which sound hardware is different between DK and DK Jr. MAWS shows both use discrete audio and an MB8884 (previously listed as I8035). My DK boards, and my bootleg DK Jr boards (which are clones of a real one) all have an 8035LC, this one has an 8035E (would the last letter make a difference? The 8035LC's were made by NEC, don't remember which one the 8035E was made by) Other than that, I don't know enough about them to tell ;) I'm also not sure which EPROM's are for sound on a real DK Jr to know if they have all of them on this one. I'm assuming the doubled up 2532 EPROM's on the CPU board are to replace the 2764's on a real DK Jr board. I'd try and dump them, but I don't wanna pull them off the board ;)
 
I'm not sure which sound hardware is different between DK and DK Jr. MAWS shows both use discrete audio and an MB8884 (previously listed as I8035). My DK boards, and my bootleg DK Jr boards (which are clones of a real one) all have an 8035LC, this one has an 8035E (would the last letter make a difference? The 8035LC's were made by NEC, don't remember which one the 8035E was made by) Other than that, I don't know enough about them to tell ;) I'm also not sure which EPROM's are for sound on a real DK Jr to know if they have all of them on this one. I'm assuming the doubled up 2532 EPROM's on the CPU board are to replace the 2764's on a real DK Jr board. I'd try and dump them, but I don't wanna pull them off the board ;)

So is it a DK or a Radar Scope? I am so confused! :eek:

EDIT:
I looked at the photos and now I see it was a RS.
 
Yeah, it definitely was originally a Radarscope board, since the boards are labeled TRS2. The board layouts are a little different than my two DK TKG3 4-board sets. Other than the audio issue described in the original post, it plays good. I was mainly interested in it so I can practice DK Jr at home using a standard Nintendo 4-way stick. I can play it on a 48-in-1 in my Gaplus cab, but DK Jr pretty much sucks using a Midway 8-way stick ;) A regular DK Jr 2-board doesnt fit in a DK cocktail, but since this was done on a Radarscope 4-board, which is the same size as the TKG3 boards used in the cocktails, it fits perfectly.
 
Yeah, it definitely was originally a Radarscope board, since the boards are labeled TRS2. The board layouts are a little different than my two DK TKG3 4-board sets. Other than the audio issue described in the original post, it plays good. I was mainly interested in it so I can practice DK Jr at home using a standard Nintendo 4-way stick. I can play it on a 48-in-1 in my Gaplus cab, but DK Jr pretty much sucks using a Midway 8-way stick ;) A regular DK Jr 2-board doesnt fit in a DK cocktail, but since this was done on a Radarscope 4-board, which is the same size as the TKG3 boards used in the cocktails, it fits perfectly.

Ahh! So there wasn't a DKJr cocktail?
 
They redesigned the DK Jr cocktails. DK cocktails (which is what I have) have a 13" monitor, and the board sits vertically, and doesn't have much room above it. The DK Jr's actually have a 19", and the 2-board sets fit in it (either DK or DK Jr). I don't know what they did, if they made them deeper, set the board at an angle, or what. I've never seen one open.
 
They redesigned the DK Jr cocktails. DK cocktails (which is what I have) have a 13" monitor, and the board sits vertically, and doesn't have much room above it. The DK Jr's actually have a 19", and the 2-board sets fit in it (either DK or DK Jr). I don't know what they did, if they made them deeper, set the board at an angle, or what. I've never seen one open.

AAAHHH! That makes me want a DKjr Cocktail!
 
I'm not sure which sound hardware is different between DK and DK Jr. MAWS shows both use discrete audio and an MB8884 (previously listed as I8035). My DK boards, and my bootleg DK Jr boards (which are clones of a real one) all have an 8035LC, this one has an 8035E (would the last letter make a difference? The 8035LC's were made by NEC, don't remember which one the 8035E was made by) Other than that, I don't know enough about them to tell ;) I'm also not sure which EPROM's are for sound on a real DK Jr to know if they have all of them on this one. I'm assuming the doubled up 2532 EPROM's on the CPU board are to replace the 2764's on a real DK Jr board. I'd try and dump them, but I don't wanna pull them off the board ;)

MB8884 is a Fujitsu-made 8035 clone.
 
Hot damn, I got sound! (well, most of them anyway) I got to wondering if I put a DK sound board on it, if it'd work (since they're almost the same board). I swapped it out with my bad DK board (which has perfect sound), and got a bunch of sounds, but the wrong ones (obviously) and they must not be mapped the same as DK Jr. I was gonna try and split up the 4K DK Jr sound ROM onto 2 2716's (which is what the DK sound board has), but I can't get my burner to do 2716's for some reason. I can UV erase them, they verify blank, but when I try to program them, it gives me an error. Anyway, since the original board only had a 2716, but whoever did the mod changed it to use a 2732 instead, I took the 2732 sound ROM off of one of my bootleg DK Jr boards, fired her up, and lo and behold, when I coined it up, the credit sound worked. So I started a game and the intro music, Kong stomping his feet, background music, grabbing a fruit (and smashing with the fruit) and stage clear music all work for all screens, The 2732 that was on there must have been bad. It seems to not play any of the analog(?) sounds (running, jumping, falling, the landing "thud" and point award. Just the high pitched sound when you run/jump). Which I guess makes sense, since those are probably generated with circuits on the board itself, and this was originally a Radarscope board. Now I just need to program another 2732 to replace the one I robbed off of my bootleg DK Jr board :D
 
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