Caple C871i Manual de usuario descargar pdf (Pagina 245)

100

101

Apple II Computer Info

#############################################################################

### FILE : keypresses

#############################################################################

### Created : Friday, September 27, 1996 Modified: Friday, September 27, 1996

### File Type: "TEXT" File Creator: "LMAN"

### File Size: 4094 bytes 3 KB

#############################################################################

Newsgroups: comp.sys.apple2.programmer

Path: news.uiowa.edu!chi-

news.cic.net!newsfeed.internetmci.com!news.msfc.nasa.gov!pendragon!ames!waikato!co

mp.vuw.ac.nz!actrix.gen.nz!dempson

From: [email protected] (David Empson)

Subject: Re: Control key

Message-ID: <[email protected]>

Sender: [email protected] (News Administrator)

Organization: Actrix - Internet Services

Date: Tue, 13 Feb 1996 12:29:15 GMT

References: <[email protected]>

<[email protected]> <[email protected]>

<[email protected]>

X-Nntp-Posting-Host: atlantis.actrix.gen.nz

Lines: 82

In article <[email protected]>,

John Bowling <[email protected]> wrote:

> >In article <[email protected]>,

> >Jay Krell <[email protected]> wrote:

> >>[email protected] (Sean McAfee) writes:

> >>>How is it that the Event Manager is able to determine that the Control key

> >>>was being pressed during the last keydown event?

> >

> >>C025 (don't use it) is well documented to hold the status of

> > ^^^^^^^^^^^^

> >>control, shift, apple, option, keypad, etc., though with slight

> >>inaccuracies wrt control and the arrows.

I don't understand this comment about control/arrow inaccuracies. It

has always worked fine for me - the arrow keys by themselves do not

indicate that the control key is down, so they can be detected

(because the ASCII code was a control character). If Control-Arrow is

pressed, it cannot be distinguished from Control and the corresponding

letter.

(This could be avoided by bypassing the standard keyboard handling

provided by the keyboard microcontroller, and processing key up/down

sequences directly, using the ADB service request mechanism - you then

get scan codes for the keys, so every key can be identified correctly.)

> I've used it in a few programs that need to get around the C crap of

> requiring a <return> key on every entry, and I've never had a problem

> with it.

> So, why not?

Compatibility.

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 245 of 572

1 2 ... 240 241 242 243 244 245 246 247 248 249 250 ... 571 572

Caple C871i Manual de usuario Pagina 245

Comentarios a estos manuales

Caple C871i Manual de usuario Pagina 245

Comentarios a estos manuales

Relacionado con productos y manuales para Placas Caple C871i