Texas Instruments TI89 Developer Guide - Page 74
Certificate Header, Flash Application Layout
UPC - 033317198566
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32 Chapter 7: Flash Application Layout 7.1.2. Offset (bytes) 0 8 10 11 12 13 14 16 17 25 48 49 50 74 Length (bytes) Contents 8 "**TIFL**" 2 revision number 1 flags (0 = binary data) 1 object type (0) 1 revision day 1 revision month 2 revision year 1 length of internal application name 8 internal application name (zero-padded on the right end if length < 8 bytes) 23 filler (zeros) 1 device type (0x98 = TI-89, 0x88 = TI-92 Plus) 1 data type (0x24 = application) 24 filler (zeros) 4 length of data following header Table 7.1: Flash Header Format Binary-coded decimal, most significant digit first. Integer, least significant byte first. Certificate Header The certificate header is used by the license tracking software in the calculator. This header is kept with the application when it is downloaded into the calculator and when it is transmitted from one calculator to another or uploaded to a computer. The certificate contains variable-length tagged fields. The application itself is actually a tagged field of the certificate. Other fields include the application's product ID (a number which cross-references the certificate with a license in the calculator's unit certificate), revision number, build number, internal name, and an embedded date certificate (the date the certificate was created). TI-89 / TI-92 Plus Developer Guide Not for Distribution Beta Version January 26, 2001