A question about the JP version of Kirby 64 compatibility

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tepples
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Re: A question about the JP version of Kirby 64 compatibilit

Post by tepples » Thu Aug 01, 2019 9:49 am

Fisher wrote:Some pictures of Goldeneye 007, wich has a 4K EEPROM can be seem here.
Every time I clicked anywhere on the linked page on tcsr2001.tripod.com, it instead opened a full-screen pop-up window.
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Is this expected?

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Fisher
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Re: A question about the JP version of Kirby 64 compatibilit

Post by Fisher » Thu Aug 01, 2019 10:07 am

That`s strange, for me it is working normally:
Site
Site
I`m uploading the pictures of the Goldeneye`s PCB:
PCB
PCB
PCB Back
PCB Back

lidnariq
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Re: A question about the JP version of Kirby 64 compatibilit

Post by lidnariq » Thu Aug 01, 2019 11:10 am

tepples wrote:If N64 games' save EEPROM indeed uses JOYBUS, it's either 1-Wire (good) or a custom part (unfortunate).
JOYBUS is a proprietary protocol, not 1-wire. Unlike 1-wire, the falling edge is sent by whatever's talking, not the host. And it's faster.
Fisher wrote:AFAIK the EEPROM part number is BU9850.
There are four serial EEPROMs used in the N64:
BU9850, BK4K - both 4kibit
BK16DH, BK16DF - both 16kibit
The two on the left behave the same subtly different way from the two on the right. Normal games don't care. I'm told that at least one ROM hack has used the difference as a kind of DRM.
I've found a package with 10 for sale on [Aliexpress.]
Those are used part pulls, if you care.

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Fisher
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Re: A question about the JP version of Kirby 64 compatibilit

Post by Fisher » Wed Aug 07, 2019 12:08 pm

Just to record, the cartridge arrived today and it's working pretty fine, thanks guys!
lidnariq wrote:Those are used part pulls, if you care.
Damm! Certainly taken from other N64 cartridges. :cry:

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