The leatest kernel V1.47b for R4i SDHC V1.4.3,R4i SDHC V1.4.2,R4i SDHC V1.4.1 which works with DSi V1.4.3.
Sourcing:http://www.r4icard-ds.co.uk/r4i-sdhc-v143-c-910.html
Sourcing:http://www.r4icard-ds.co.uk/r4i-sdhc-v143-c-910.html