LinkRawCable_demo.zip
When using this ROM, the slave sets the data, sets bit 7 of SIOCNT, and then it waits until the bit is unset to get the response.
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On hardware, the bit is only unset after the master also sends.
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On mGBA 0.10.2, the bit is immediately set to zero, resulting in the return of old data
Source code of the ROM:
https://github.com/afska/gba-link-connection/blob/e04a7356ee28ba6a336f9ce1b791dc1611c92942/lib/LinkRawCable.hpp
https://github.com/afska/gba-link-connection/blob/e04a7356ee28ba6a336f9ce1b791dc1611c92942/examples/LinkRawCable_demo/src/main.cpp
LinkRawCable_demo.zip
When using this ROM, the slave sets the data, sets bit 7 of SIOCNT, and then it waits until the bit is unset to get the response.
On hardware, the bit is only unset after the master also sends.
On mGBA 0.10.2, the bit is immediately set to zero, resulting in the return of old data
Source code of the ROM:
https://github.com/afska/gba-link-connection/blob/e04a7356ee28ba6a336f9ce1b791dc1611c92942/lib/LinkRawCable.hpp
https://github.com/afska/gba-link-connection/blob/e04a7356ee28ba6a336f9ce1b791dc1611c92942/examples/LinkRawCable_demo/src/main.cpp