Konami mapper circuit diagram

yo Erik,

i'm building the same mapper..
I'm halfway there...

I'll let you know if mine works or not.

Jipe, do you know if it possible to modify this mapper to an scc style mapper?
Is it just a matter of using different address lines into the mapper? I have no clue (yet) how all this work and would like to learn.
As I want to use this mapper scheme for the mmc drive of sharksym. But that one expects an scc type mapper ...

SCC roms use the special SCC-chip to do the mapping.

So you'll have remove an SCC chip from an original Konami (noooo !!) and place it in your own circuit.

Or you can do the same as I (am going) do and build a std megarom mapper (so 4000 6000 8000 a000) and use an external SCC-ROM (with a switch for example) to use the SCC capabillities. This way no Konami-rom has to suffer.

I am not looking at a flash scc rom as I have 2 of those already.
I want to make the mmc interface without scc chip. So I don't have to butcher the konami
first I need to get the mapper working. Could also be due to faulty ls670 chips. I have 3 of them which all test incorrect on my logic analyzer.
Last week I ordered a lot of new of these chips so I hope this the cause.
To be continued.
In the mean time I hope you finish yours and say it works

Ive tried again with new ls670 chips and still no luck. I am now switching to another approach. I have ordered a bunch of scc chips and will use that instead of the zemina mapper. That way I will also have no problems with the software.
If some one is interested in some of those chips I might have some spares. Costs of those chips are around 7 euros a piece.

I have ordered a bunch of scc chips and will use that instead of the zemina mapper
...
Costs of those chips are around 7 euros a piece.

You mean REAL Konami's chips? Where have you found them?