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PostPosted: Sat Nov 04, 2017 4:13 am 
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Joined: Mon Dec 12, 2011 8:15 pm
Posts: 362
in china,Dragon Ball Z series pirate cassette , using this chip for save game, how does the emulation XLS93C56P?
example:
Attachment:
File comment: this is example
20171104191134.jpg
20171104191134.jpg [ 25.99 KiB | Viewed 459 times ]


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PostPosted: Sat Nov 04, 2017 11:12 am 
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Joined: Fri Jul 04, 2014 2:34 pm
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Location: Germany
Googling that spit out the datasheet for me. Maybe this helps:
https://4donline.ihs.com/images/VipMast ... 43A3159BB0


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PostPosted: Sat Nov 04, 2017 11:48 am 
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Joined: Sun Apr 13, 2008 11:12 am
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Location: Seattle
AX5705 = VRC2?

93C family EEPROMs are a SPI memory where each transaction isn't a multiple of 8 bits.

Have you looked at the PDF for how the EEPROM works?


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PostPosted: Sat Nov 04, 2017 5:06 pm 
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Joined: Sun Jun 12, 2011 12:06 pm
Posts: 260
Location: Poland
Oh, where you get those weeird cards from :)
Could you please upload some PCB p0rn?


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PostPosted: Sat Nov 04, 2017 5:16 pm 
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Joined: Mon Dec 12, 2011 8:15 pm
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我有这个卡带15年了,我还有很多类似的。我在中国。
I've had this card for 15 years. I have many similar. I am in China。
我认为这个芯片可以单独模拟
I think this chip can be emu.


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PostPosted: Sat Nov 04, 2017 5:18 pm 
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Joined: Mon Dec 12, 2011 8:15 pm
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krzysiobal wrote:
Oh, where you get those weeird cards from :)
Could you please upload some PCB p0rn?

我没有拆卸的工具。
I don't have a tool to disassemble.
但是这个卡的数据我读取了
but this cart data i dumped.


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PostPosted: Tue Nov 14, 2017 8:36 pm 
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Joined: Mon Dec 12, 2011 8:15 pm
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93c46,I found the SEGA SMS game to use 93C46.
93C46,我发现SEGA SMS游戏使用93c46.

Can I use 46 of the code instead of 56(BizHawk)?
我能不能使用46的代码代替56(BizHawk) ?


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PostPosted: Wed Nov 15, 2017 12:42 am 
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Joined: Sun Apr 13, 2008 11:12 am
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Location: Seattle
For the 93Cx6 serial EEPROMs, that digit specifies the total size.

93C46 = 1024 bits, 128 bytes
93C56 = 2048 bits, 256 bytes
93C66 = 4096 bits, 512 bytes
&c

The 93CX6 EEPROMs require exactly as many bits present when the external computer is clocking in the address, so the 93C46 requires 7 bits to be clocked in; the 93C56 requires 8, and so on. There are no padding bits in smaller EEPROMs.

For example, the bits clocked into a 93C46 to start reading from address 0 would be:
1 1 0 0 0 0 0 0 0

but the bits clocked into a 93C66 to start reading from address 0 would be:
1 1 0 0 0 0 0 0 0 0 0


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