Author
| Konami mapper circuit diagram
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Erikie
msx lover
Posts: 68 |  Posted: August 17 2008, 13:34 |
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  |
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Jipe
msx freak
Posts: 205 | Posted: August 17 2008, 15:32 |
rather than to change the hardware to make a mapper scc it is not possible to change the software to adapt the MMC Rom?
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Erikie
msx lover
Posts: 68 | Posted: August 20 2008, 15:41 |
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.
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Jipe
msx freak
Posts: 205 | Posted: August 20 2008, 22:28 |
the mapper zemina is not for a scc
the scc mapper have adress 5000 7000 9000 B000
the zemina mapper have adress 4000 6000 8000 A000
see this schematic : http://msx.retro8bits.com/msxarchives/msxram.zip
is a cartridge with all mapper and automatic switching
is a mix of megaram ese-sram and use 74LS670 and SRAM
is not the zemina mapper but a personnal way
i make it in 2003 and i have 2 in working
but i don't construct it
is do it yourself
but after verification on U2A U2B the D6 ad D7 are inverted
the program loading but 16k 8k switch are inverted and game not working
i make schematic for scc only but i don't know added picture with my post
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Pentarou
msx user
Posts: 33 | Posted: August 20 2008, 22:43 |
Quote:
| I have ordered a bunch of scc chips and will use that instead of the zemina mapper
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Costs of those chips are around 7 euros a piece.
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You mean REAL Konami's chips? Where have you found them? |
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dhau
msx master
Posts: 1062 | Posted: August 20 2008, 23:34 |
Yes, please share your source, if you can, Jipe. I'd like to buy 10 or so SCC chips, if they are working well.
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luppie
msx lover
Posts: 78 | Posted: August 21 2008, 11:01 |
Quote:
| i make schematic for scc only but i don't know added picture with my post
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Just mail me the picture and i'll host it and will post it in this topic.
Mail-address :  |
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Jipe
msx freak
Posts: 205 | Posted: August 21 2008, 11:35 |
it's ok i send you 3 mappers konami scc and ascii 8k
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luppie
msx lover
Posts: 78 | Posted: August 21 2008, 11:45 |
These are the mappers from Jipe:
ASCII:
Konami:
SCC:
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