pinout sega genesis cartridge slot

For hardware talk only (please avoid ROM dumper stuff)
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HardWareMan
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Post by HardWareMan » Fri Aug 13, 2010 9:51 am

KanedaFr wrote:Hmmm....
So, if I don't connect !cart to GND (on cart side), CD will boot and cart data is readable on $400000+
if I don't connect !cart to GND (on cart side) and doesn't connect a CD, nothing happens.
if I connect !cart to GND (on cart side), Cart will be boot and CD is readable at $400000+
Right.
KanedaFr wrote:I'm not familiar with $A12000-$A120FF, it's where you can switch on/off the led and initiate transfert between MD68k and CD68k right ?
It's too related to CD, not general use...I mean I can't use $A12000-$A120FF to access 'something' else on the ext port
For example, in this thread, my projects use !ROM for access to ROM and !FDC for access to devices, such as HDD in first project and MMC in second project. In case of MCD, there are control registers of MCD.

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KanedaFr
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Post by KanedaFr » Fri Aug 13, 2010 11:59 am

Oh! you're right! I totally forgot ECart while I bookmarked it!
The author gave some details on exp port.
I'm looking for a way to communicate throught the exp port because it should be faster than using joy3 port.

bastien
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Post by bastien » Sat Aug 14, 2010 7:55 am

excuse me but, someone can tell me if my redirection in *.XLS for are good ??

bastien
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Post by bastien » Thu Aug 26, 2010 1:40 pm

hi,
i request your help please :wink: ,
i have made my SMS adaptator with a SEGA Genesis PCB,

so i have connected my SMS cartridge slot with this redirection:

Image

-A15 in sega pcb is unconnected and i have grounded B10 , and Rom/RAm in B17 sega PCB

but i have nothing when i start my MD....

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