Int 33/AX=0000h

MS MOUSE - RESET DRIVER AND READ STATUS

AX = 0000h

Return:
AX = status 0000h hardware/driver not installed FFFFh hardware/driver installed BX = number of buttons 0000h other than two 0002h two buttons (many drivers) 0003h Mouse Systems/Logitech three-button mouse FFFFh two buttons

Notes: Since INT 33 might be uninitialized on old machines, the caller should first check that INT 33 is neither 0000h:0000h nor points at an IRET instruction (BYTE CFh) before calling this API. To use mouse on a Hercules-compatible monographics card in graphics mode, you must first set 0040h:0049h to 6 for page 0 or 5 for page 1, and then call this function. Logitech drivers v5.01 and v6.00 reportedly do not correctly use Hercules graphics in dual-monitor systems, while version 4.10 does.. The Logitech mouse driver contains the signature string "LOGITECH" three bytes past the interrupt handler; many of the Logitech mouse utilities check for this signature.. Logitech MouseWare v6.30 reportedly does not support CGA video modes if no CGA is present when it is started and the video board is later switched into CGA emulation

See Also: AX=0011h - AX=0021h - AX=002Fh - INT 62/AX=007A

Category: Mouse/Pointing Device - Int 33h - M

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