Caple C871i Manual de usuario descargar pdf (Pagina 210)

Apple II Computer Info

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

### FILE : io16.serial

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

### Created : Sunday, January 14, 1996 Modified: Sunday, January 14, 1996

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

### File Size: 7794 bytes 7 KB

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

Newsgroups: comp.sys.apple2.comm

Path: news.weeg.uiowa.edu!news.uiowa.edu!hobbes.physics.uiowa.edu!math.ohio-

state.edu!sol.ctr.columbia.edu!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!uw-

beaver!netnews.nwnet.net!news.clark.edu!lclark!NewsWatcher!user

From: [email protected] (Ivan Drucker)

Subject: plans for simple serial i/o (game port) part 1

Message-ID: <[email protected]>

Followup-To: comp.sys.apple2.comm

Sender: [email protected] (News Poster)

Nntp-Posting-Host: 149.175.6.233

Organization: Lewis and Clark College, Portland OR

Date: Sun, 27 Feb 1994 18:13:36 +0000

Lines: 138

By previous demand from a long time ago, I'm going to reproduce the plans

for a simple serial output from the ][/][+/][e 16-pin game port. These

originally appeared in the January 1978 Apple ][ Reference manual that was

included with the computer back when they gave useful informatin as part of

the package.

A SIMPLE SERIAL OUTPUT

The Apple II is equipped with a 16 pin DIP socket most frequently used

to connect potentiometers, switches, etc. to the computer for paddle

control and other game applicatins. This socket, located at J-14, has

outputs available as well. With an appropriate machine language program,

these output lines may be used to serialize data in a format suitable for a

teletype. A suitable interface circuit must be built since the outputs are

merely LSTTL and won't run a teletype without help. Several interface

circuits are discussed below and the user may pick the one best suited to

his needs.

The ASR-33 Teletype

The ASR-33 Teletype of recent vintage has a transistor circuit to drive

its solenoids. This circuit is quite easy to interface to, since it is

provided with its own power supply. (Figure 1a) It can be set up for a

20mA current loop and interfaced as follows (whether or not the teletype is

strapped for full duplex or half duplex operation):

a) The yellow wire and purple wire should both go to terminal 9 of

Terminal Strip X. If the purple wire is going to terminal 8, then remove

it and relocate it at terminal 9. This is necessary to change from the

60mA current loop to the 20mA current loop.

b) Above Terminal Strip X is a connector output socket identified as

"2". Pin 8 is the input line + or high; Pin 7 is the input line - or low.

This connector mates with a Molex receptacle model 1375 #03-09-2151 or

#03-09-2153. Recommended terminals are Molex #02-09-2136. An alternate

connection method is via spade lugs to Terminal Strip X, terminal 7 (the +

input line) and 6 (the - input line).

c) The following circuit can be built on a 16 pin DIP component carrier

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 210 of 572

1 2 ... 205 206 207 208 209 210 211 212 213 214 215 ... 571 572

Comentarios a estos manuales

Sin comentarios

Caple C871i Manual de usuario Pagina 210

Comentarios a estos manuales

Relacionado con productos y manuales para Placas Caple C871i