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Graphics Interchange Format  |  1996-06-19  |  75KB  |  628x365  |  4-bit (15 colors)
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OCR: Ext. Len Bytes Mark Len Seq Type Ext. Length HChk Data Check Name Size Description Mark 1 Start-of-packet character, usually Control-A. Length 0 or 1, offset by 32, to indicate the extended packet format. Sequence 1 Packet sequence number, modulo 64, offset by 32. Type 1 Packet type. Ext. Length 2-3 Length of data and error check, base 95, each digit offset by 32. HChk 1 Error check of previous four fields. Data variable Packet data, prefix encoded. Check 1-3 Error check of data. Figure 2: Kermit long and extra-long packet format.