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[Console Repair/Mod Center / Re: Here is a 4M type eprom cart... I need help!]

sorry.
there is my mistake.
I used JEDEC type eproms.

1st rom was verify failure.2,3,4 were roms passed.
maybe 1st rom is extra rom??? as you mentioned.
I think cart will be need some modification to work rom image on it.A17,18,19 address line is doubtful.

A17 & A19 of pc-engine was connected at 74ls138 TTL of cart.
A18 of pc-engine was not connected.
ENABLE location of 74ls138 was connected at GND.

[Console Repair/Mod Center / Re: Here is a 4M type eprom cart... I need help!]

Thanks zeon.
Here is pic of hex editor.
Rom is ninja gaiden (J).but I found out my pic differ from yours.
the location (offset 000~1f0.no FFs) is empty??(00s..)
other roms are same.
if it means red circle,I already remove them,tested it.
not working.
what rom is your hex pic??? 

I use 1M eproms (27c010,non jedec)

sure,I know nintendo choice.because I have many pcbs..
In s.korea exists interesting hardware... zemix(msx console),famicom arcade pcb,megadrive arcade pcb(use 5 16M eproms,included 5 games) and pce,dreamcast,msx pcb......
When I am not busy,I want to show them

[Console Repair/Mod Center / Re: Here is a 4M type eprom cart... I need help!]

I check romset with hex editor today.
where is the FFs??? I cant find them at first (offset 000~1f0)
there are only blank.
if it means blank (offset 000~1f0),I deleted them,
but does not work.(blue screen,not boot!)
of course I burned japanese romset correctly.
although I tested some title (aero blaster,blodia...etc) ,any romset does not work.
Please let me know in detail.

this cart is not a original homemade.manufactured for arcade.
I got it from arcade operator.
also I had purchased it before,but had sold it to japanese user and ebay user.
my pc-engine is not for home,for arcade (with timer,rgb outputs)

the cart is smart design.(available max 6 eproms)
I think it can be modified 4M type or 8M type though it has 1M type.

sorry for poor english.
I am located south korea.

[Console Repair/Mod Center / Here is a 4M type eprom cart... I need help!]

I got new adventure island eprom cart.
It has four 1M rom sockets, programmed by someone. working good condition.

But I failure to work the cart with other rom.
the eprom cart did not work,when I programmed eproms with eprom bunner.
I think the romset was burned correctly

what is the reason???
Please let me know.....