TXT2COM (Keith P. Graham)

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== Identification ==
 
== Identification ==
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COM files produced by all known versions of TXT2COM have the ASCII string "{{magic|TXT2COM Conversion utility}}" somewhere near the beginning of the file. It's at:
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To identify a generated file...
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* offset 3 for v1.0-v1.1
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* offset 5 for v2.0 through at least v2.03 (It's probably not hard to identify the specific version, but that's not investigated here.)
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* offset 14 for at least v2.06 and v2.10
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Note: Versions 1.1 through 2.1 all produce files containing the version number "1.1".
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v1.0: Starts with {{magic|e9 2f 01}}, has "{{magic|TXT2COM Conversion utility.}}" at offset 3.
  
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If the string is at offset 3, the first 3 bytes of the file are:
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v1.1: Starts with {{magic|e9 38 01}}, has "{{magic|TXT2COM Conversion utility. Vers 1.1}}" at offset 3.
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* {{magic|e9 2f 01}} for TXT2COM v1.0
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* {{magic|e9 38 01}} for TXT2COM v1.1
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* {{magic|e9 d0 19}} for TXT2RES.COM from TXT2COM v2.0 and some later versions
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Files produced by TXT2RES/v2.06 have "{{magic|TXT2RES Conversion utility}}" at offset 3.
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v2.00: Starts with {{magic|e8 3a 01 cd 20}}, has "{{magic|TXT2COM Conversion utility. Vers 1.1}}" at offset 5, has {{magic|0x16}} at offset 319.
  
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Files produced by TXT2PAS/v2.06 have "{{magic|TXT2PAS Conversion utility}}" at offset 3.
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v2.01: Starts with {{magic|e8 3a 01 cd 20}}, has "{{magic|TXT2COM Conversion utility. Vers 1.1}}" at offset 5, has {{magic|0xb8}} at offset 319.
 +
 
 +
v2.02: Starts with {{magic|e8 3a 01 cd 20}}, has "{{magic|TXT2COM Conversion utility. Vers 2.2}}" at offset 5.
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 +
v2.03: Starts with {{magic|e8 3a 01 cd 20}}, has "{{magic|TXT2COM Conversion utility. Vers 2.3}}" at offset 5.
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 +
v2.06: Starts with {{magic|8d 26}}, has "{{magic|TXT2COM Conversion utility. Vers 2.06}}" at offset 14.
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 +
v2.10: Starts with {{magic|8d 26}}, has "{{magic|TXT2COM Conversion utility. Vers 2.10}}" at offset 14.
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 +
TXT2RES v1.0: Starts with {{magic|e9 d0 19}}, has "{{magic|TXT2COM Conversion utility}}" at offset 3.
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 +
TXT2RES v2.03, v2.06, v2.10: Starts with {{magic|0xe9}}, has "{{magic|TXT2RES Conversion utility}}" at offset 3.
 +
 
 +
TXT2PAS v2.03, v2.06, v2.10: Starts with {{magic|0xe9}}, has "{{magic|TXT2PAS Conversion utility}}" at offset 3.
  
 
== See also ==
 
== See also ==

Revision as of 18:27, 24 March 2024

File Format
Name TXT2COM (Keith P. Graham)
Ontology
Extension(s) .com
Released 1987
See TXT2COM for other things with that name.

TXT2COM is a DOS utility that converts a text file to a COM file that, when executed, displays the text in a full-screen viewer. It was developed by Keith P. Graham.

To recover the original text file, run the .COM file in a DOS environment, then press the 'T' key.

Later versions include TXT2RES and/or TXT2PAS, special-purpose variants of the software.

Later versions support special features enabled by markup syntax in the source document.

Contents

Overview of releases

The version numbering convention approved by the change log is that versions through 2.2 have one digit after the decimal point. Then came versions 2.03 through 2.10, which have two digits after the decimal point.

Some of the information in this table is guessed, as some releases do not contain a clear version number. For clarification, the "Size" column is the size in bytes of the TXT2*.COM file.

Program Version Date Size Remarks
TXT2COM.COM 1.0 1987-06-19 3757 Creates files containing no version number.
TXT2COM.COM 1.1 1987-07-21? 3775 Creates files containing "Vers 1.1".
TXT2COM.COM 2.0 1987-07-26? 3938 Creates files containing "Vers 1.1".
TXT2COM.COM 2.1 1987-08-30 4356 Creates files containing "Vers 1.1". Includes README.COM from v2.0.
TXT2COM.COM 2.2 1987-11-01 4380 Creates files containing "Vers 2.2".
TXT2COM.COM 2.03 1987-11-12 5173 Creates files containing "Vers 2.3".
TXT2COM.COM 2.06 1988-08-26 7772 Creates files containing "Vers 2.06".
TXT2COM.COM 2.10 1993-07-27 8525 Creates files containing "Vers 2.10".
TXT2RES.COM 1.0 1987-07-27 8837 Included with TXT2COM v2.0-2.2. Creates files containing "TXT2COM" and "Vers 1.1".
TXT2RES.COM 2.03 1987-11-12 9828
TXT2RES.COM 2.06 1988-08-26 11400
TXT2RES.COM 2.10 1993-07-27 12153
TXT2PAS.COM 2.03 1987-11-12 10714
TXT2PAS.COM 2.06 1988-08-26 12312
TXT2PAS.COM 2.10 1993-07-27 13055

Versions 2.04 and 2.09 might also have been released, but they haven't been found. The README.COM file from v2.10 might have been created by v2.09.

Identification

To identify a generated file...

v1.0: Starts with e9 2f 01, has "TXT2COM Conversion utility." at offset 3.

v1.1: Starts with e9 38 01, has "TXT2COM Conversion utility. Vers 1.1" at offset 3.

v2.00: Starts with e8 3a 01 cd 20, has "TXT2COM Conversion utility. Vers 1.1" at offset 5, has 0x16 at offset 319.

v2.01: Starts with e8 3a 01 cd 20, has "TXT2COM Conversion utility. Vers 1.1" at offset 5, has 0xb8 at offset 319.

v2.02: Starts with e8 3a 01 cd 20, has "TXT2COM Conversion utility. Vers 2.2" at offset 5.

v2.03: Starts with e8 3a 01 cd 20, has "TXT2COM Conversion utility. Vers 2.3" at offset 5.

v2.06: Starts with 8d 26, has "TXT2COM Conversion utility. Vers 2.06" at offset 14.

v2.10: Starts with 8d 26, has "TXT2COM Conversion utility. Vers 2.10" at offset 14.

TXT2RES v1.0: Starts with e9 d0 19, has "TXT2COM Conversion utility" at offset 3.

TXT2RES v2.03, v2.06, v2.10: Starts with 0xe9, has "TXT2RES Conversion utility" at offset 3.

TXT2PAS v2.03, v2.06, v2.10: Starts with 0xe9, has "TXT2PAS Conversion utility" at offset 3.

See also

Software

Sample files

  • The README.COM file included with most versions of the software
  • STELTH24.ZIP → CATALOG.COM - v2.0
  • KOLOR!.ZIP → *.COM - TXT2RES v1.0
  • WP51TPOP.ZIP → *.COM - TXT2PAS and TXT2RES v2.03

Links

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