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AX = 3000h BX = 1234h DS:DX -> 8-byte version string (DX < FFF0h) "CTask21",00h for v2.1-2.2
Return:
AL = DOS major version AH = DOS minor version CX:BX -> Ctask global data block
Program: CTask is a multitasking kernel for C written by Thomas Wagner
Note: If first eight bytes of returned data block equal eight bytes passed in, CTask is resident
Category: DOS-Based Task Switchers/Multitaskers - Int 21h - C
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