Profile

Cover photo
Manuel Trujillo
Works at Grupo Blidoo
Attended Nuestra Señora del Carmen
Lives in Terrassa, Barcelona, Spain.
558 followers|1,205,552 views
AboutPostsPhotosVideos+1'sReviews

Stream

Manuel Trujillo

Shared publicly  - 
 
 

1969 Holden Hurricane concept car - Restored 2011
video ➤ https://www.youtube.com/watch?v=iezc14zdYCM
View original post
1
Add a comment...

Manuel Trujillo

Shared publicly  - 
 
 
On this day:
At 26th April of 1983, the 'TRS-80 Model 4 Computer' was released.

The TRS‑80 Model 4, introduced on April 26, 1983, was the continuation of the TRS‑80 computer line that had begun with the Model I in 1977 and sold by Tandy Corporation through their Radio Shack stores. The Model 4 was 100% compatible with the Model III and was able to run all Model III operating systems and applications. The designers of the Model 4 had taken great pains to ensure this complete compatibility to avoid the same kind of problems encountered when the TRS‑80 Model III was introduced.

The Model III had been only partially compatible with Model I software and lack of compatibility was viewed as a costly misstep by Radio Shack. Don White, the Model 4 product line manager, stated, “I took it once on the Model I/III incompatibility and I won’t go through that again.”

The Model 4 originally retailed at around $1999.00 but the price was later dropped to around $999.00 and seven years after its introduction it was being blown out at around $600.00. The earliest versions of the TRS-80 Model 4 had a black and white display which later changed to green. Also, the early run of the Model 4 had a non-gate array which was changed to a gate array in later production. The early version had the up/down and left/right keys on opposite sides of the keyboard. The later version clustered the arrow keys together on the right side.

The TRS-80 Model 4 came with either 64k or 128k ram and had either one or two 5.25" floppy drives of 184 KB each. A later Model 4D, or DeskMate, had double sided 384 KB drives. A graphics adapter that came with BASICG was also available for the Model 4. The Model 4 was also originally designed to use the 16-bit Z800 microprocessor from Zilog.

The Z800 was planned by Zilog to be Z80 compatible, yet capable of running new 16-bit software. That would have provided an ideal upgrade path for the Model 4’s future, but unfortunately Zilog never produced the part. Early versions of the Model 4 included a Z800 socket on the motherboard but the socket was removed in later redesigns.

Unlike the versions of TRSDOS for the Model I and III, Radio Shack contracted with an outside company to write the Model 4 operating system. Logical Systems (the authors of LDOS) created TRSDOS 6, regarded as one of the best features of the Model 4. TRSDOS 6 was a very powerful operating system, supporting advanced features such as device redirection, batch processing, and device filtering. It retained most of the commands and feel of Model I TRSDOS, yet added new features to use the improved hardware. Logical Systems also sold TRSDOS 6 under the name LS‑DOS, and it was well known under that name.

The Model 4 could run all Model III software and that feature became unexpectedly important. Internal conflicts within Radio Shack had led to many of the Model 4 software projects in development being cancelled before its release. Although some of those projects were restarted, the delay meant there wasn’t much Model 4 software for months after it was introduced. The delay probably helped to create a stronger third party Model 4 software market. Even with software availability problems, the Model 4 remained Radio Shack’s best selling computer until 1986.

Radio Shack introduced the Model 4P, a transportable Model 4, in 1984. The Model 4P was software compatible with the desktop Model 4, but could be transported in its own carrying case. The final member of the Model I/III/4 line, the Model 4D, was released in 1985. It came standard with double sided drives and was bundled with DeskMate integrated software. Although no longer the focus of Radio Shack’s computer lineup, the Model 4D was available until around 1994, outlasting almost all of the TRS‑80’s original competitors.

Many current computer professionals grew up using a TRS-80 Model 4. Hours spent playing games such as Zaxxon, Frogger and Computer Diplomacy along with programming in BASIC led to lucrative future careers in the computing fields. For that reason the TRS-80 Model 4 is very collectable as many want to relive their younger days and enjoyable times on the Model 4. Quite a few of these machines were made so they are not that hard to find. In really good working condition they can be found for $150.00 to $300.00.

#Onthisday  #TRS80Model4
#PC  #Computer
#80sTechnology  #RetroComputing
#Oldschool  #Tandy
#Retro  #RadioShack
7 comments on original post
1
Add a comment...
 
EarthSky News - April 25 - Powerful Earthquake Rocks Nepal via @earthskyscience http://eepurl.com/bkUw9f
1
Add a comment...

Manuel Trujillo

Shared publicly  - 
 
Comiendo en la ONG Estrella en la Fira medieval de Montblanc. 
 ·  Translate
4
Add a comment...
 
Las 20 películas más esperadas para el verano 2015

http://www.actualidadcine.com/las-20-peliculas-mas-esperadas-para-el-verano-2015/
 ·  Translate
Se acerca el verano y aquí os traemos las 20 películas esperadas de estos próximos meses.
1
Add a comment...
In his circles
912 people
Have him in circles
558 people
Anem a la Festa's profile photo
Jacob Daniels's profile photo
El rincón del comprador's profile photo
Tomas GiS's profile photo
Juan Carlos Rendon Roldan's profile photo
Richard Alviarez's profile photo
DynaBoot's profile photo
kular saab's profile photo
hajji khalil shekhanni's profile photo

Manuel Trujillo

Shared publicly  - 
1
Add a comment...
 
 
Learn bash programming in 10 minutes :) Also check home page for other languages such as ruby, python and more http://learnxinyminutes.com/
Bash is a name of the unix shell, which was also distributed as the shell for the GNU operating system and as default shell on Linux and Mac OS X. Nearly all examples below can be a part of a shell script or executed directly in the shell. Read more here. #!/bin/bash # First line of the script ...
1 comment on original post
1
Add a comment...

Manuel Trujillo

Shared publicly  - 
 
EarthSky News - April 26 - Top Stories This Week via @earthskyscience http://eepurl.com/bkYmMb
Tonight. Moon and Jupiter close again. Venus is just outside this frame. Start watching now as Venus and Jupiter draw closer together on our sky's dome. They'll have a stunningly close conjunction in late June and early July.
1
Add a comment...

Manuel Trujillo

Shared publicly  - 
 
Viaje virtual a la 'cueva de los sueños olvidados'

http://www.elmundo.es/ciencia/2015/04/26/553a1d3be2704e2b398b4578.html
 ·  Translate
Hace 36.000 años, nuestros antepasados crearon en las paredes de una cueva situada en un acantilado a las afueras de lo que hoy es la localidad francesa de Vallon-Pont-D'Arc u
1
Add a comment...

Manuel Trujillo

Shared publicly  - 
 
La cara de Darwin en la etiqueta de Anís del Mono y otros mensajes ocultos en logos

http://verne.elpais.com/verne/2015/04/21/articulo/1429616319_852573.html
 ·  Translate
Los logotipos de muchas empresas esconden dibujos y referencias a su historia.
3
Add a comment...

Manuel Trujillo

Shared publicly  - 
 
 
¿Cuándo puedo enviar correos comerciales? ¿A quién puedo enviar correos comerciales? Consecuencias del envío...
 ·  Translate
View original post
1
Add a comment...
People
In his circles
912 people
Have him in circles
558 people
Anem a la Festa's profile photo
Jacob Daniels's profile photo
El rincón del comprador's profile photo
Tomas GiS's profile photo
Juan Carlos Rendon Roldan's profile photo
Richard Alviarez's profile photo
DynaBoot's profile photo
kular saab's profile photo
hajji khalil shekhanni's profile photo
Education
  • Nuestra Señora del Carmen
    Enseñanza General Básica, 1975 - 1982
Basic Information
Gender
Male
Other names
TooManySecrets, TooMany, Sneaker
Story
Tagline
Veni, vidi, vici.
Introduction
En el mundo Linux desde 1992. Con FreeBSD desde el 2002. Usuario de sistemas Unix-Linux. SysAdmin. BoFHer. Open Source Fan.
Bragging rights
¿Presumir? ¿Yo? Estás de coña ¿no?
Work
Occupation
SysAdmin Senior
Employment
  • Grupo Blidoo
    Administrador de Sistemas Senior, 2013 - present
  • Grupo Intercom
    SysAdmin, 2011 - 2013
  • Letsbonus
    SysAdmin, 2011 - 2011
  • Vlex
    Responsable dpto. Sistemas, 2005 - 2011
  • Kemit S.L.
    Ingeniero sistemas Linux, 2005 - 2005
  • Datagrama / Jazztel
    SysAdmin, 2002 - 2005
  • Dorna Sports
    Responsable dpto. Sistemas, 2000 - 2002
  • Atilon Inet S.L.
    Responsable dpto. Sistemas, 2000 - 2000
  • Conei S.L.
    Sysadmin, 1999 - 2000
  • Consultor independiente
    empresa propia, 1990 - 1999
  • Inem
    Auxiliar, 1986 - 1990
  • Agut S.L.
    Aprendiz prensas baquelita, 1985 - 1985
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Terrassa, Barcelona, Spain.
Manuel Trujillo's +1's are the things they like, agree with, or want to recommend.
A Prediction: 2020 the year of (PC-)BSD on the desktop
lukewolf.blogspot.com

I am going to make a prediction right now that FreeBSD is going to take off in a big way on or before 2020, perhaps even to the point where

DeviantArt
market.android.com

Simply put: The World’s Largest Art Gallery In Your Hand.DeviantArt is the largest online social community for artists and art enthusiasts,

Rosetta #CometLanding webcast by European Space Agency
new.livestream.com

Watch European Space Agency's Rosetta #CometLanding webcast on Livestream.com. Live webcast from ESA mission control, when Europe's Rosetta

Video: Predator X, most powerful marine reptile ever | EarthSky.org
earthsky.org

This deadly hunter had a skull twice the size of a Tyrannosaurus rex's, and a bite force unmatched by anything in the Jurassic seas. Cool vi

37 dibujos que te haran ver lo mal que esta el mundo
carloxs1.blogspot.com

Pawel Kuczynski es un ilustrador nacido en Szczecin, Polonia. Se graduó en Bellas Artes por la universidad de Poznan, especializándose en es

Moda online | Tienda de ropa online para hombre | Marchuet.com
www.marchuet.com

Log in. Create new account. If you wish to pre-register follow the link and fill the form. Creat account. Remember forgotten password. Twitt

Supreme Court Refuses Appeal, 50 Sherlock Holmes Works Officially in Pub...
www.finebooksmagazine.com

All this hoopla began last year when writer and attorney Leslie Klinger put together an anthology of Sherlock Holmes stories from modern wri

Easy Steps to Make GNOME 3 More Efficient | Linux.com
www.linux.com

With just a tiny bit of tweaking, GNOME 3 can be made as powerful and user-friendly as any desktop available.

What if you could see the sound of a nightingale? | EarthSky.org
earthsky.org

Australian multimedia artist Andy Thomas creates 3D animations of bird songs. He calls them “audio life forms.”

El paper dels observadors del temps en el segle XXI
www.324.cat

Els observadors meteorològics són els enviats especials del temps sobre el territori, una peça fonamental per a la secció de meteorologia. S

Google Workshop, la tienda de accesorios personalizados para Nexus
xombit.com

Google podría añadir muy pronto 'Workshop' a su tienda de Google Play, con el fin de que los usuarios de Nexus puedan adquirir accesorios pe

Madefire Motion Books & Comics
market.android.com

Madefire Motion Books & Comics is a free app that delivers the most innovative reading experience on devices with Motion Books and tradition

What Is The Best DE Razor? - Sharpologist
sharpologist.com

Double-edge (DE) razors may look the same but there are a variety of types to choose from. Here is what may be best for you. Updated March 2

PlatgesCat (Playas Cataluña)
market.android.com

La Generalitat de Cataluña pone a disposición de los usuarios una APP con toda la información de interés sobre las playas catalanas. En ella

1 review