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Re: Apple II Interrupt card
- Subject: Re: Apple II Interrupt card
- From: Default <noone@nowhere.net>
- Date: Wed, 19 Mar 2003 02:12:16 -0600
- Newsgroups: comp.sys.apple2
- Organization: University of Nebraska-Lincoln
- References: <3E77EF8D.1050502@noneofyourbusiness.com> <b58ua5$ip4$1@freenet9.carleton.ca>
- User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 (nscd1)
- Xref: archiver1.google.com comp.sys.apple2:28847
This card counts the VBL signal in a //e and generated timing interupts.
This was required to allow the computer to determine where the mouse is
on the screen, even if you don't have a mouse. It was noted in the GEOS
documentation that the card was not needed if you had a IIc or a IIe
with a mouse card. My later copy of GEOS came with a mouse.
OK Roy, here's the quote form the "Using GEOS" manual, page 123.
"Interrupt Manager Card
If you do not have a mouse attached to your Apple IIe, be sure to
install the the Interrupt Manager card in your computer. It should be
in slot 7, with its components facing the right. If you own an Apple
IIc, IIc plus, IIgs, or Laser 128, you do not need to install the
Interrupt Manager card, even if you do not have a mouse attached."
Which translates to: If you got no mouse card, use the Interrupt Manager
card instead.
Exegete (millers@noneofyourbusiness.com) writes:
The GEOS/Berkeley Softworks supplied an "IRQ Manager" card for the Apple IIe that did not have a mouse card.