DOS ain't dead

DOS tool to convert letters in text file to upper/lowercase. (Miscellaneous)

posted by Doug , 30.10.2022, 08:47

One might potentially cook up a routine using the 80x86 opcode "XLAT":

XLAT Locates a byte entry in a table in memory, using the contents of the AL register as a table index, then copies the contents of the table entry back into the AL register. AL should contain the unsigned index into a table addressed by DS:BX (for an address-size attribute of 16 bits) or DS:EBX (for an address-size attribute of 32 bits). The operand to XLAT allows for the possibility of a segment override.

https://www.scs.stanford.edu/05au-cs240c/lab/i386/XLAT.htm

- Doug B.

Complete thread:

• DOS tool to convert letters in text file to upper/lowercase. - Cyberdyne, 28.10.2022, 07:41 (Miscellaneous)
  • DOS tool to convert letters in text file to upper/lowercase. - mceric, 28.10.2022, 11:00
    • DOS tool to convert letters in text file to upper/lowercase. - Cyberdyne, 28.10.2022, 12:45
      • DOS tool to convert letters in text file to upper/lowercase. - jhall, 28.10.2022, 16:03
        • DOS tool to convert letters in text file to upper/lowercase. - jhall, 28.10.2022, 16:24
          • DOS tool to convert letters in text file to upper/lowercase. - jhall, 28.10.2022, 16:47
    • DOS tool to convert letters in text file to upper/lowercase. - Rugxulo, 31.10.2022, 23:55
  • DOS tool to convert letters in text file to upper/lowercase. - rr, 28.10.2022, 19:02
    • DOS tool to convert letters in text file to upper/lowercase. - Laaca, 28.10.2022, 21:38
      • DOS tool to convert letters in text file to upper/lowercase. - RayeR, 15.12.2022, 16:25
    • DOS tool to convert letters in text file to upper/lowercase. - bretjohn, 30.10.2022, 02:49
      • DOS tool to convert letters in text file to upper/lowercase. - rr, 30.10.2022, 11:38
        • DOS tool to convert letters in text file to upper/lowercase. - bretjohn, 31.10.2022, 16:12
  • DOS tool to convert letters in text file to upper/lowercase. - Rugxulo, 29.10.2022, 00:59
  • DOS tool to convert letters in text file to upper/lowercase. - Doug, 30.10.2022, 08:47