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Re: detecting if ASCII value is a letter

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From mmphosis <mmphosis@macgui.com>
Newsgroups comp.sys.apple2.programmer
Subject Re: detecting if ASCII value is a letter
Date Fri, 12 Aug 2016 15:57:39 -0000 (UTC)
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Show key headers only | View raw

They are not read as keys, but as push buttons...

OPNAPPLE = $C061 ;open apple (command) key data (read)

CLSAPPLE = $C062 ;closed apple (option) key data (read)

These are actually the first two game Pushbutton inputs (PB0
and PB1) which are borrowed by the Open Apple and Closed Apple
keys. Bit 7 is set (=1) in these locations if the game switch or
corresponding key is pressed.

PB2 =      $C063 ;game Pushbutton 2 (read)
This input has an option to be connected to the shift key on
the keyboard. (See info on the 'shift key mod'.)

TAPEIN =   $C060 ;bit 7 = data from cassette on Apple II,
or PB3           ;II+, IIe. On IIgs bit 7 reflects the
                 ;status of Game Port Pushbutton 3--
                 ;closed= 1. (read)

http://web.archive.org/web/20101216114131/http://home.swbell.net/rubywand/csa2pfaq.html#004

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Thread

detecting if ASCII value is a letter Mark Lemmert <mark.lemmert@gmail.com> - 2016-08-11 10:49 -0700
  Re: detecting if ASCII value is a letter Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-11 13:04 -0700
  Re: detecting if ASCII value is a letter Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-11 13:05 -0700
  Re: detecting if ASCII value is a letter Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-11 13:44 -0700
    Re: detecting if ASCII value is a letter Mark Lemmert <mark.lemmert@gmail.com> - 2016-08-11 14:25 -0700
    Re: detecting if ASCII value is a letter Michael J. Mahon <mjmahon@aol.com> - 2016-08-11 23:44 -0500
  Re: detecting if ASCII value is a letter Mark Lemmert <mark.lemmert@gmail.com> - 2016-08-11 16:26 -0700
    Re: detecting if ASCII value is a letter Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-11 18:28 -0700
      Re: detecting if ASCII value is a letter Michael J. Mahon <mjmahon@aol.com> - 2016-08-12 02:54 -0500
        Re: detecting if ASCII value is a letter Mark Lemmert <mark.lemmert@gmail.com> - 2016-08-12 07:37 -0700
          Re: detecting if ASCII value is a letter Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-12 08:10 -0700
          Re: detecting if ASCII value is a letter mmphosis <mmphosis@macgui.com> - 2016-08-12 15:57 +0000
            Re: detecting if ASCII value is a letter Mark Lemmert <mark.lemmert@gmail.com> - 2016-08-12 11:11 -0700
              Re: detecting if ASCII value is a letter Michael J. Mahon <mjmahon@aol.com> - 2016-08-12 16:15 -0500
              Re: detecting if ASCII value is a letter Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-13 09:53 -0700
                Re: detecting if ASCII value is a letter Michael J. Mahon <mjmahon@aol.com> - 2016-08-13 15:29 -0500
                Re: detecting if ASCII value is a letter Mark Lemmert <mark.lemmert@gmail.com> - 2016-08-19 19:22 -0700
              Re: detecting if ASCII value is a letter rich.martin@gmail.com - 2016-08-13 20:49 -0700
      Re: detecting if ASCII value is a letter Anthony Lawther <alawther@spammenot.mac.com> - 2016-08-14 16:09 +0900
        Re: detecting if ASCII value is a letter Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-15 09:09 -0700
    Re: detecting if ASCII value is a letter John Brooks <jbrooks@blueshiftinc.com> - 2016-08-11 21:49 -0700
      Re: detecting if ASCII value is a letter Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-12 06:17 -0700
        Re: detecting if ASCII value is a letter Mark Lemmert <mark.lemmert@gmail.com> - 2016-08-12 07:40 -0700
          Re: detecting if ASCII value is a letter Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-12 10:37 -0700
            Re: detecting if ASCII value is a letter Mark Lemmert <mark.lemmert@gmail.com> - 2016-08-12 11:41 -0700
              Re: detecting if ASCII value is a letter Michael J. Mahon <mjmahon@aol.com> - 2016-08-12 16:15 -0500
            Re: detecting if ASCII value is a letter D Finnigan <dog_cow@macgui.com> - 2016-08-12 21:09 +0000
              Re: detecting if ASCII value is a letter Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-12 17:35 -0700

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