Magtek aDynamo Programmer's Reference Manual page 42

Appendix D - Batch Data Format
DynaPro Format:
F9<len>/* container for MAC structure and generic data */
DFDF54(MAC KSN)<len><val>
DFDF55(MAC Encryption Type)<len><val>
DFDF25(IFD Serial Number)<len><val>
FA<len>/* container for generic data */
F0<len>/* Transaction Results */
(Buffer if any to be a multiple of 8 bytes)
CBC-MAC (4 bytes, always set to zeroes)
aDynamo, uDynamo, Dynamag, DynaMAX, eDynamo, BulleT| Secure Card Reader Authenticator | Programmer's Reference (Android)
F1<len>/* container for Status Data */
... /* Status Data tags */
F8<len>/* container tag for encryption */
DFDF59(Encrypted Data Primative)<len><Encrypted
Data val (Decrypt data to read tags)>
DFDF56(Encrypted Transaction Data KSN)<len><val>
DFDF57(Encrypted Transaction Data Encryption Type)<val>
DFDF58(# of bytes of padding in DFDF59)<len><val>
F7<len>/* container for Merchant Data */
... /* < Merchant Data tags */
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