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1. NO BLATANT PIRACY. This includes reproducing homebrew less than 10 years old, with the exception of free software.
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PostPosted: Thu May 23, 2019 6:08 am 
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Joined: Tue Feb 27, 2018 10:41 am
Posts: 44
Location: Brazil
Is it possible to make a Crazy Climber repro using an UNROM board by just swapping the 74HC32 IC for a 74HC08?


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PostPosted: Thu May 23, 2019 6:31 am 
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Joined: Sun Apr 13, 2008 11:12 am
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Location: Seattle
Yes, and that's exactly what Nintendo did back in the day. (NEScartDB)


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PostPosted: Thu May 23, 2019 7:22 am 
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Joined: Tue Feb 27, 2018 10:41 am
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Location: Brazil
Thank you!
By the way, what's the correct mirroring of this game? I have a ROM with a Vertical one in iNES header, but in NEScartDB it's listed as Horizontal.


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PostPosted: Thu May 23, 2019 7:26 am 
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Joined: Sun Apr 13, 2008 11:12 am
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Location: Seattle
NEScartDB is almost always authoritative.

(anyway, look at the picture of the PCB in NEScartDB. "V" is soldered, meaning Vertical Arrangement, or horizontal mirroring)


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PostPosted: Mon Jun 17, 2019 8:58 pm 
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Joined: Fri Jul 24, 2015 2:44 pm
Posts: 10
Sorry this a bit late, but crazy climber can be wired exactly the same as any other UNROM reproduction, and all you'll need to change the 74-32 for a 74HC08. It's an exact swap, so just desolder the old chip, pop in a 74-08, and continue as normal.

Source: test board on my desk currently.


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