Sennen Kazoku not working because of RTC

[RobertPeip]

Directly at startup there is this message.

According to a non-native japanese speaker the text says:
"The clock equipment is broken. The other lines is to contact nintendo for this problem."

Tested with Release 1.2

[jsmolka]

It seems that Sennen Kazoku doesn't follow the workflow described in GBATEK:

1. Init CS=LOW and /SCK=HIGH, and wait at least 1us
2. Switch CS=HIGH, and wait at least 1us
3. Send the Command byte (see bit-transfer below)
4. Send/receive Parameter byte(s) associated with the command (see below)
5. Switch CS to LOW

Instead it "sets" CS low and then immediately proceeds with step 2 (while SCK is still low). I removed the /SCK=High requirement in my emulator and it works with Sennen Kazoku and the Pokemon games. There is also a nice demo you can use for RTC testing (it uses the siirtc code from the Pokemon Emerald disassembly project).

[RobertPeip]

I could verify that with this change it works in my emulator. Big thanks for finding and commenting here.
Hopefully it will also work in Nanoboy.

[fleroviux]

@jsmolka I guess that makes sense. The serial clock probably shouldn't matter if the chip isn't selected in the first place. Thanks for this!

[fleroviux]

Ugh. Turns out all the game ever really wanted (in my case) was enabling 24h-mode by default.