Konami mapper circuit diagram

Champion (324)

14-08-2008, 19:36

I made the konami mapper diagram posted on HansO website but it does not work.
This is the schematic: http://msx.retro8bits.com/msxdocs/MapperMSXKonami.pdf
I am using a modified ISA development board and I checked all wires twice with a multimeter.
There are no short circuits and no loose connections.
When I have the logic ICs in the machine does not start. Without ICs and with the board inserted the machine boots.
And when I have all the logic ICs except the 72ls02 in the machine also boots.
The 74ls02 is OK as I have tested it with my programmer. No errors on that one.
Is this mapper circuit 100% OK? or is there something I am missing?
I hope someone can help as I want to use this circuit as the basis for other projects.

Thanks a lot,

Erik

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Por Jipe

Paragon (1625)

14-08-2008, 21:07

sorry i make some error when i re-make this schematic

on 74LS670

D0 is on pin 3
D1 is on pin 2
D2 is on pin 1
D3 is on pin 15

pin 10 go to A16 pin 2 of eprom
pin 9 go to A15 pin 3 of eprom
pin 7 go to A14 pin 27 of eprom
pin 6 go to A13 pin 28 of eprom

on original PCB of zemina signal of pin 22 and 24 are inverted but is the same work

Por Erikie

Champion (324)

14-08-2008, 22:13

Well I changed the signals but still no luck. Black screen, not even msx logo ...

Por Jipe

Paragon (1625)

15-08-2008, 07:32

which eprom uses you and qu' you put like play game inside

Por Erikie

Champion (324)

15-08-2008, 08:06

I am using a m27c2001 eprom with space manbow burned on it. I used this eprom also on a modified scc cartridge without any problem.
Does it matter which eprom you use on this schematic? As I want to use a flash rom in a later stage.
Also I am using the 4mbit circuit with a 2mb eprom now.

And what kind of schematic does a standard konami megarom game without scc? Is there also a custom mapper chip in place or is it also based on 74ls670? In that case I can open a cartridge I have at home (nemesis 1) and look at it in detail over here
I appreciate your help Jipe!

Por Jipe

Paragon (1625)

15-08-2008, 12:28

space manbow is a SCC cartridge mapper is 5000 7000 9000 B000

the schematic is for a Konami cartridge mapper is 4000 6000 8000 A000 like Metal Gear , Vampire Killer , King Kong 2

if you open a nemesis 1 you found a special chip for konami mapper

Por Erikie

Champion (324)

15-08-2008, 13:43

OK, will try any of those later.
Do I need to switch any of the wires of the 2nd ls670? or did you only draw the the lines wrong for the first ls670?

Por Jipe

Paragon (1625)

15-08-2008, 14:41

I think that is similar zemina did not respect order of the adress signal
that must go with the two shematic but bank of eprom must be reverse with zemina eprom
i desold a zemina cartridge and check it

Por Jipe

Paragon (1625)

15-08-2008, 18:45

the rom is the same in zemina cartridge and on .rom from emulator
the order of data d0 to d3 is not the problem

i make a error : is data and not adress signal in previous post

Por Erikie

Champion (324)

15-08-2008, 21:51

Jipe what should I do now?
As I do not understand what is wrong

Por Jipe

Paragon (1625)

15-08-2008, 23:16