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From: pfluegerm@gtephxgtephx.UUCP (Mike Pflueger)
Newsgroups: comp.sys.mac,comp.sys.mac.programmer
Subject: Mouse PRAM settings won't change
Keywords: PRAM mouse control
Message-ID: <44016c56.15840@gtephx.UUCP>
Date: 23 Jun 89 17:01:45 GMT
Distribution: na
Organization: AG Communication Systems, Phoenix, Arizona
Lines: 31


I'm having trouble changing the mouse speed with the mouse CDEV.

I had powered down my Mac Plus and removed the battery (for up to 3 hours).  Upon
reinstalling the battery, powering up the mac and resetting all PRAM info, everything
works OK except the "mouse tracking" comes up set to "tablet".  When I click any of
the other (faster) settings, the radio button highlights, but has no effect on mouse
speed. Closinbg and reopening the mouse CDEV and/or control panel has no effect;
when I reopen the mouse CDEV, the speed is invariably reset to "tablet".  The "PRAM
write successful" flag is always set after attempting this.

Note that the "double click" speed works OK.  Yes, I've also tried replacing the mouse
CDEV with an original, but to no avail.

PRAM also seems to be OK, as I go in thru MacsBug and set the corresponding bits to
the mouse speed I want (@ $208).  The mouse tracking changes accordingly, and looking
at the mouse CDEV, the correct setting is shown.  But if I try to change it thru the
CDEV, it won't change.  By the way, the hack is saved in PRAM.

I've also tried all of this with the old "mouse scaling" bit set both ways (via
MacsBug) to no avail.  By the way (APPLE, or someone), is the mouse scaling bit
functional anymore?  My understanding is that this acts as an "accelerator" setting,
with the cursor moving faster or slower depending on acceleration (dv/dt), not
velocity, of the mouse.  Seems that it would be very desirable to still provide this
function.

This is with a Mac Plus, system 6.0.2/Finder 6.0, mouse and general CDEVs are 3.3.1,
and Control Panel is 3.3.1.

Thanks in advance
Mike Pflueger @ pfluegerm @ AG Communication Systems, Phoenix, AZ  602-582-7049