Pirate mapper 221

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Pirate mapper 221
by jpx72 on 2010-11-02 (#69402)
I was wondering if somebody here has some info on mapper 221. I found a cartridge inside one of my famiclones and dumped the rom. Here's the cartridge:
http://jpx72.detailne.sk/modd_files/fc/front.jpg
http://jpx72.detailne.sk/modd_files/fc/back.jpg
Then I found a simillar rom "700-in-1" (google 700-in-1 [p1][U][!] ), converted header to iNes and found it's #221. So I added this header to my dump and it worked. I also sent this dump to a member here and it somehow ended on the internet (google 1000-in-1 (JPx72) [!] ).
Image
This cartridge means a lot to me, and I will like to have a backup copy of it, even if it means to create exact copy and reproduce the whole logic:
74LS32
74LS161
74LS32
74LS153
74LS273
74HC04
74LS08
28 pin RAM chip
27C080 (exact pinout, no need to rewire).
But I was wondering if the cartridge cannot be reproduced on some other mapper, something simple...

by kyuusaku on 2010-11-02 (#69404)
A game generally can't be moved to a simpler mapper. This is especially the case with multicarts which are designed to maintain compatibility with discrete mappers in order to not need to mapper hack every game. Common mappers do NOT have the ability to emulate simple discrete mappers like this, so you have no choice but to reproduce the mapper in discrete chips or in programmable logic. If you had a NROM multicart where games didn't bankswitch, that would be a different story, though you'd still have to modify common mappers to be able to address 8M of PRG ROM.

by jpx72 on 2010-11-02 (#69405)
Thanks for the explanation, I didn't understood why is the mapper logic so difficult. Ok then, I'm going to reproduce it 1:1 :)
(I was looking forward to test my friends' CNC drill to make PCB anyway).