Western Digital WDM2, WDM20 Motherboards, and PS/2 Mouse Port
ID: Q63921
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The information in this article applies to:
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Microsoft Windows versions 3.0, 3.0a
SUMMARY
The Microsoft Mouse does not function properly on a Western Digital WDM2 or
WDM20 motherboard if it is connected to the PS/2 mouse port. The keyboard
ROM on this motherboard causes erratic mouse movement when Windows is in
standard or enhanced mode.
MORE INFORMATION
There are four possible corrections to the problem, as follows:
- Connect the mouse to one of the serial ports.
- Use a bus mouse such as the Microsoft or Logitech bus mouse.
- Send the motherboard to a Western Digital Service center to have
the keyboard ROM chip replaced.
- Modify the HIMEM.SYS line in the CONFIG.SYS file to read
HIMEM.SYS /M:2.
The PS/2 mouse port on a non-PS/2 computer is a special adapter port
on the machine. You use a serial mouse with a special adapter on one
end to connect to this adapter port. The PS/2 mouse port uses a
hardware specific interrupt (usually IRQ12) to communicate with the
mouse instead of the normal serial ports that are on IRQ3 and IRQ4.
Additional query words:
3.00 3.0 3.0a 3.00a KBHW win30
Keywords :
Version : WINDOWS:3.0,3.0a
Platform : WINDOWS
Issue type :