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AX = 12FFh BX = 0009h DX = new value for root segment of upper memory link
Return:
AX = 0000h if supported ES:BX modified
Notes: The DX value is stored at offset 66h in SYSVARS (see INT 21h/AH=52h) and offset 18h in the Novell DOS 7 internal variable table (see INT 21/AX=4458h). This API is provided by IBMBIO.COM for the initialization phase of drivers loaded via DEVICE=/HIDEVICE=/DEVICEHIGH= directives and is only available during these short time intervals. It is probably initiated by the Novell DOS 7+ EMM386.EXE.. This function has apparently been supported since DR DOS 6.0 "Buxton" of 1991/03/19. For Novell DOS 7, ES:BX points at the internal variable table DRDAT, but this may change in future releases
Category: Other Operating Systems - Int 2Fh - D
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