AST 386 and Bus Mouse Ports

• Microsoft Windows operating system versions 3.0, 3.0a

SUMMARY

AST Research, Inc. has updated Programmable Logic Array (PAL) chips available that correct bus-card timing problems on AST 386 systems. The updated PAL chips solve the problem of jumpy (or jerky) mouse movement in Microsoft Windows version 3.0 when you use a bus-style mouse.

MORE INFORMATION

AST Research, Inc., 386 systems with motherboards numbered 202273 and 202356 may need a PAL chip update to correct bus-card timing problems. The PAL revision that needs replacement is 107101-557B. This number appears on the top of the chip. It should be replaced with 107101-557C.

On motherboards numbered 202273, the chip location is socket U46. On motherboards numbered 202356, the chip location is socket U74.

For more information regarding replacement of this chip, contact AST Research technical support.

The products included here are manufactured by a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding these product's performance or reliability.