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Int 54
 - IRQ4 relocated by DESQview
Int 54
 - IRQ4 relocated by IBM 3278 emulation control program, OS/2 v1.x
Int 54
 - TI Professional PC - ACTIVATE TASK SUBROUTINE
Int 54
 - Tandy 2000 - LINE PRINTER
Int 54/AX=5400h
 - Toshiba PCMCIA2 - INSTALLATION CHECK

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