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Format:TAP tape image file format

46 bytes added, 08:55, 1 September 2014
The .TAP files contain blocks of tape-saved data. All blocks start with two bytes specifying how many bytes will follow (not counting the two length bytes). Then raw tape data follows, starting with the flag byte. Unlike speccy format, the checksum bytes are not included, so you don't need calculate the crc-ccitt every 256 bytes, or padding the last page with zeroes, or ending with four 0xff bytes trailer.
1D 00 2C 50 68 61 6E 74 6F 6D 61 73 32 20 20 20 20 20 20 01 FF 02 58 00 00 AD FF ^^^^^...... first block is 29 bytes (28 bytes+flag) ^^... flag byte (A reg, 2C for headers, 16 for data blocks)
file name .^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
block number ..............................................^^
58 00 10 AD 59 00 16 06 12 0A 00 2A 02 18 06 1E 07 30 0C 00 0D ..
^^^^^............... logical length, in consecutive blocks (88 bytes)
^^^^^......... execution address for machine code programs (0xAD10)
Byte Size Name Description
0 16 Filename Padded to 16 bytes Name of the file, padded with nulls 16 1 Block number Filename (padded with blanks)The first block is 1, numbers are consecutive
17 1 Last block A non-zero value means that this is the last block of a file
18 1 File type A value recording the type of the file (see below)
3 = ASCII
4..7 are unallocated
Bits 4..7 Version ASCII files should be version 1, all other files, version 0
= Trapping the ROM routine =
Entry Point 2836 29A6 29A6
Exit Point 2872 29E2 29E2
 
[[Category:Definitions]]