No it doesnt work on the R4 or DSTT, the only cards that it works on without the need of the arm7 fix are the CycloDS and SCDS1, and probably the G6Real.
And the forgotten Acekard RPG, thanks to gelu and yellow.wood.goblin and their excellent firmware. Estpolis and Utacchi also seem to work perfectly.
Signature
/l、 (゚、 。 7 l、 ~ヽ じしf_, )ノ Nintendo DS Lite | Acekard RPG with WoodRPG | microSDHC Transcend 8GB class6 | 3in1 Expansion Pack | Hori screen filter