Archives pour la catégorie ‘Constructeur’

Utilisation d’un iMac en tant qu’écran avec le mode d’affichage cible

25/07/2017 Comments off
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Le mode d’affichage cible permet d’utiliser l’écran intégré d’un iMac pris en charge en tant qu’écran externe pour un autre ordinateur Mac.


À propos du mode d’affichage cible

Pour utiliser un iMac en tant qu’écran, connectez-le à un autre ordinateur Mac à l’aide du câble adéquat (voir Configuration système requise ci-dessous). Appuyez ensuite sur les touches Commande + F2 du clavier relié à l’iMac. Appuyez de nouveau sur cette combinaison de touches pour mettre fin au mode d’affichage cible.

Configuration système requise

Démarrer le moded’affichage cible

Quitter le mode d’affichage cible Options d’affichage

Configuration système requise

Pour pouvoir utiliser le mode d’affichage cible, vous devez disposer des éléments suivants :

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Categories: Constructeur, Système Tags: ,

How to Run MacOS Sierra in a Virtual Machine for Free, the Easy Way

15/04/2017 Comments off
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Advanced Mac users may find it useful to run macOS or Mac OS X in a virtual machine atop their existing Mac operating system. Creating a virtual machine for Mac OS is now easier than ever before, and we’ll show you how to set up easy Mac virtual machines on a Mac.

For some quick background, virtualization allows you to run another operating system in a confined virtual machine atop an existing operating system through an application layer. This means there is no disk partitioning involved, the virtualized operating system runs just like any other application on your computer. We have covered this broad topic many times before for purposes like running Windows 10 on a Mac with a VM, to running Ubuntu Linux in VirtualBox, to Snow Leopard in a VM, and others. In the guide here, we will be creating a Macintosh virtual machine for running Mac OS on top of Mac OS, which can be helpful for testing out different apps and operating system versions, amongst other purposes.

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How to create a bootable macOS Sierra installer drive

31/03/2017 Comments off
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Apple uses its App Store to distribute its software, like new Mac operating systems. It’s convenient, but sometimes it can take a while for a download to finish. And if you have multiple Macs, it’s inefficient to download the new OS to each and every Mac.


That’s why I like to make a bootable external drive for the sole purpose of installing the Mac operating system. When I need to tend to a bunch of Macs, it’s much faster to use a bootable drive instead of going to each Mac, launching the App Store, searching for the operating system, downloading it (after entering my Apple ID), and then running the installer.

You can create a bootable USB flash drive with the macOS Sierra installer that’s now available. The installer software will take up nearly 5GB of storage space. Here’s how to create a bootable macOS Sierra installer drive.

Macworld also has bootable-install-drive instructions for El Capitan (OS X 10.11), Yosemite (OS X 10.10), Mavericks (OS X 10.9), Mountain Lion (OS X 10.8), and Lion (OS X 10.7).

Download the macOS Sierra installer

Launch the App Store app, then look for macOS Sierra in the store. (Here’s a link.) Click on the Download button, and your Mac will download the installer to your Applications folder. If it automatically launches after download, quit the installer.

Keep the installer in the Applications folder.

If you’ve already upgraded your Mac to Sierra, the installer is removed from the Applications folder. You can download it again if you go to Purchased in the App Store. Look for macOS Sierra in the list of apps that you’ve bought, and click on the Download button. If it automatically launches after download, quit the installer.

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HP-41C Synthetic Programming

23/11/2016 Comments off
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Many of these instructions were intentionally left out because used incorrectly they can confuse the calculator and cause either a lockup or a « Memory Lost » state. (If you get into the former state, you may need to remove the batteries to reset the calculator.)

You should backup anything important before first engaging in Synthetic Programming.

How Synthetic Instructions Work

HP-41 instructions are one or more bytes long. The calculator will only allow certain sequences, but with the tool below, you’ll be able create new sequences by entering code that the calculator allows and then grabbing bytes out of this code to create different instructions. These new sequences allow access to additional characters, additional sounds, more alpha editing commands, easy control of the calculator through direct access to system registers, etc. They make it possible to do new things and to reduce the size and execution time of programs. The byte grabber described below will allow you to remove individual bytes from programs you create so the the bytes that remain are interpreted differently.

Creating a Byte Grabber

You can use the following steps to create a Byte Grabber. Make sure to follow the steps exactly. If it doesn’t work the first time, try again. Note that the first step is a master clear so save anything important to cards, tape, or disk now!

  1. Remove any accessory modules.
  2. Do a Master clear by holding down the backspace key while turning on the calculator. The Display will show MEMORY LOST.
  3. Assign « + » to the LN key by pressing shift ASN ALPHA shift + ALPHA LN.
  4. Assign « DEL » to the LOG key by pressing shift ASN ALPHA D E L ALPHA LOG.
  5. Press PRGM to witch to program mode. The display should show 00 REG 45.
  6. Start catalog 1 by pressing shift CATALOG 1 and press R/S immediately before the display blinks. If the display blinks, you waited too long. Repeat this step as many times as necessary to get the R/S pressed before the display blinks. (The display will show the .END. instruction both before and after the blink, but you must press R/S before the blink.)
  7. Press the ALPHA key to go into Alpha mode.
  8. Press the backspace key. The display should now show 4094 RCL 01.
  9. Press ALPHA to leave Alpha mode.
  10. Press shift GTO .005 and you should see 05 LBL 03.
  11. Press USER (if necessary) to enter User mode.
  12. Press LOG 003 which uses the assignment you made earlier to DEL 3 steps. You should now see 04 STO 01.
  13. Press ALPHA to go back into Alpha mode.
  14. Press ? A A A A A A (Everything after the first A will probably display as « -« s.) Press exactly 6 A’s!
  15. Press PRGM to leave program mode and ALPHA to leave Alpha mode.
  16. Press shift GTO . . (press both dots)

The byte grabber should now be assigned to the LN key. Press AND HOLD the LN key which should display XROM 28,63. Keep holding the key until the calculator displays NULL because you don’t want to execute the byte grabber now. This would be a good time to save the calculator’s status on a card by pressing XEQ ALPHA W S T S ALPHA in case you accidentally destroy the byte grabber later.

Be careful in using the byte grabber. You may get a « MEMORY LOST » or lock the calculator if you use it incorrectly. If the latter happens, remove the batteries for a few seconds and return them. If that doesn’t work, try turning the calculator on a few times with the batteries out or leave them out for several hours. Lire la suite…

Categories: Constructeur, Matériel Tags:

Digital Equipment Corporation PDP-12

23/02/2016 Comments off
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The PDP-12 was a 12 bit machine introduced in 1969. It sold for $27,900. The PDP-12 was designed as a successor to the LINC-8 and was compatible with LINC-8 software.


Programmed Data Processor (PDP) was a series of minicomputers made and marketed by the Digital Equipment Corporationfrom 1957 to 1990. The name « PDP » intentionally avoided the use of the term « computer » because, at the time of the first PDPs, computers had a reputation of being large, complicated, and expensive machines, and the venture capitalists behind Digital (especially Georges Doriot) would not support Digital’s attempting to build a « computer »; the word « minicomputer » had not yet been coined.[citation needed] So instead, Digital used their existing line of logic modules to build a Programmed Data Processor and aimed it at a market that could not afford the larger computers.

The various PDP machines can generally be grouped into families based on word length.

Members of the PDP series include:


The original PDP, an 18-bit machine used in early time-sharing operating system work, and prominent in MIT’s early hacker culture, which was to lead to the (Massachusetts) Route 128 hardware startup belt (DEC’s second home, Prime Computer, etc.). What is believed to be the first video game, Spacewar!, was developed for this machine, along with the first known word processing program for a general-purpose computer, « Expensive Typewriter ».


A number reserved for an unbuilt, undesigned 24-bit design.


First DEC-designed (for US « black budget » outfits) 36-bit machine, though DEC did not offer it as a product. The only PDP-3 was built by the CIA’s Scientific Engineering Institute (SEI) in Waltham, MA to process radar cross section data for the Lockheed A-12 reconnaissance aircraft in 1960.[1][2] Architecturally it was essentially a PDP-1 controlling[citation needed] a PDP-1 stretched to 36-bit word width.[3]




18-bit machine intended to be a slower, cheaper alternative to the PDP-1; it was not considered commercially successful. All later 18-bit PDP machines (7, 9 and 15) were based on a similar, but enlarged instruction set, more powerful, but based on the same concepts as the 12-bit PDP-5/PDP-8 series. One customer of these early PDP machines was Atomic Energy of Canada. The installation at Chalk River, Ontario included an early PDP-4 with a display system and a new PDP-5 as interface to the research reactor instrumentation and control.


DEC’s first 12-bit machine. Introduced the instruction set later expanded, in the PDP-8, to handle more bit rotations and to increase the maximum memory size from 4K words to 32K words. It was the first computer series with more than 1,000, then 10,000 built, which was a large number in the decade after ENIAC/UNIVAC builders predicted that 3 computers would serve the nations computing needs.




36-bit timesharing machine. Very elegant architecture; introduced the instruction set later used in the PDP-10 and DECSYSTEM-20. It was considered by its detractors a large minicomputer or, by DEC fans especially, Big Iron – a mainframe As a timesharing machine, it constantly outran the batch-oriented IBM System/360 and even IBM System/370-series mainframes.




Replacement for the PDP-4; DEC’s first wire-wrapped machine. The first version of Unix, and the first version of B, a predecessor of C, were written for this machine at Bell Labs, as was the first version (by DEC) of MUMPS.










12-bit machine with a tiny instruction set; DEC’s first major commercial success and the start of the minicomputer revolution. Many were purchased (at discount prices, a DEC tradition, which also included free manuals for anyone who asked during the Ken Olsen years) by schools, university departments, and research laboratories. Later models were also used in the DECmate word processor and the VT-78 workstation. It is reported that Edson de Castro, who had been a key member of the design team, left to form Data General when his design for a 16-bit successor to the PDP-8 was rejected in favour of the PDP-11; the « PDP-X » did not resemble the Data General Nova,[4] although that is a common myth.


A hybrid of the LINC and PDP-8 computers; two instruction sets. Progenitor of the PDP-12.


Successor to the PDP-7; DEC’s first micro-programmed machine. It featured a speed increase of approximately twice that of the PDP-7. The PDP-9 was also one of the first small or medium scale computers to have a keyboard monitor system based on DIGITAL’s own small magnetic tape units (DECtape).[5] The PDP-9 established minicomputers as the leading edge of the computer industry.


36-bit timesharing machine, and fairly successful over several different models. The instruction set was a slightly elaborated form of that of the PDP-6.






The archetypal minicomputer; a 16-bit machine and another commercial success for DEC. The LSI-11 was a four-chip PDP-11 used primarily for embedded systems. The 32-bit VAX series was descended from the PDP-11, and early VAX models had a PDP-11 compatibility mode. The 16-bit PDP-11 instruction set has been very influential, with processors ranging from the Motorola 68000 to the Renesas H8 and Texas Instruments MSP430, inspired by its highly orthogonal, general-register oriented instruction set and rich addressing modes. The PDP-11 family was extremely long-lived, spanning 20 years and many different implementations and technologies.





Descendant of the LINC-8; with slight redesign, and different livery, officially followed by, and marketed as, the « Lab-8 ». See LINC and PDP-12 User Manual.


Designation was not used, apparently due to superstition.


A machine with 12-bit instructions, intended as an industrial controller (PLC). It had no data memory or data registers; instructions could test Boolean input signals, set or clear Boolean output signals, jump conditional or unconditionally, or call a subroutine. Later versions (for example, the PDP-14/30) were based on PDP-8 physical packaging technology. I/O was line voltage.




DEC’s final 18-bit machine. It was its only 18-bit machine constructed from TTL integrated circuits rather than discrete transistors, and, like every DEC 18-bit system (except mandatory on the PDP-1, absent on the PDP-4) had an optional integrated vector graphics terminal, DEC’s first improvement on its early-designed 34n where n equalled the PDP’s number. Later versions of the PDP-15 ran a real-time multi-user OS called « XVM ». The final model, the PDP-15/76 used a small PDP-11 to allow Unichannel peripherals to be used.




A « roll-your-own » sort of computer using Register Transfer Modules, mainly intended for industrial control systems with more capability than the PDP-14. The PDP-16/M was introduced as a standard version of the PDP-16.

Categories: Constructeur, Matériel Tags:

Raspberry Pi Camera Streaming to VLC Player

09/02/2014 Comments off
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Recently I discovered the pi’s in my quest for making a device with recognition software to locate items on the ground while being attached to a multi-rotor helicopter.

The Raspberry Pi is perfect. only needing 5v to run means its great for running off batteries etc. anyway to the streaming part.

To stream to VLC from your Raspberry Pi Camera to your computer over a network you need to install VLC Player on both the Raspberry Pi & PC/ Mac what ever.

for the PC/ MAC its simple just go to the VLC downloads page – as for the Pi its more complicated.
Lire la suite…

Freebox Révolution & VPN

28/01/2014 Comments off
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source: médiasoft technologies

2011 a vu l’arrivée de la Freebox Révolution.

Révolution pour les uns, mais régression pour certains.

Explications : bon nombre d’utilisateurs plus ou moins aguerris ou professionnels utilisaient la Freebox V5 en mode bridge en y raccordant un vrai routeur de façon à disposer de certaines fonctionnalités évoluées (Firewall, VPN, redirections de ports, etc.).

Or, sur la nouvelle Freebox (v6), il est devenu impossible de passer en mode bridge, celle-ci étant prévue pour fonctionner en mode routeur. De plus, comme chacun le sait (ou pas), les FAI n’aiment pas les modems standard, leur box est leur cheval de bataille, pour ne pas dire ouvertement leur cheval de Troie pilotable à souhait au niveau d’une QOS qui ne profite pas nécessairement au consommateur.

Certains objecteront, non sans raison, qu’un professionnel ferait mieux de souscrire une abonnement chez un fournisseur adapté, Nerim par exemple (c’est ce que je fais du reste), mais il ne faut pas perdre de vue que bon nombre de professionnels exercent à domicile et sont en droit d’attendre une offre qui satisfasse aussi bien leur besoins professionnels que leurs loisirs. Lire la suite…

Que faire, si la mise à jour de Mac Ports échoue?

28/01/2014 Comments off
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Si vous êtes sous Mac et que vous tentez de faire un

sudo port selfupdate

pour mettre à jour MacPorts, il est possible que vous obteniez le message suivant :

Error: /opt/local/bin/port: port selfupdate failed: Error installing new MacPorts base: command execution failed

Pas de panique !

Pour arranger le souci, il suffit que vous installiez Xcode et les Command Line Tools. Pour cela, rendez-vous dans l’App Store. Installez Xcode, puis lancez-le.

Ensuite, allez dans le menu XCode -> Preferences et dans l’onglet « Downloads », installez les « Command Line Tools ».

xcodeRelancez ensuite la commande

sudo port selfupdate

Et cette fois, Mac Ports devrait se mettre à jour correctement. Ensuite, pour mettre à jour les paquets dont la date limite de fraicheur a expiré, tapez la commande :

sudo port upgrade outdated

Programmer l’heure d’exécution de Time Machine

28/01/2014 Comments off
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Si vous êtes utilisateur d’OSX, peut-être faites-vous vos sauvegardes avec Time Machine sur un NAS ou une Time Capsule…

Et ça vous fait ch*er car cette sauvegarde se lance une fois par heure, faisant ramer votre ordinateur déjà un peu à bout de souffle… C’est quand même un peu sauvage un backup incrémental toutes les heures, surtout quand on passe sa vie sur The Pirate Bay 🙂

Alors, comment faire pour programmer cette sauvegarde une fois par jour (genre la nuit) ou une fois par semaine, voire une fois par mois si vraiment les sauvegarde vous n’en avez rien à faire (et ça c’est mal !) ?

La solution s’appelle Time Machine Editor. Il s’agit d’un petit soft pour OSX qui permet tout simplement de programmer le moment exact où vous souhaitez lancer la sauvegarde TimeMachine.


Attention, ce soft nécessite pour fonctionner efficacement, que vous désactiviez la TimeMachine. (oui, ça peut paraitre bizarre, mais Time Machine Editor gère son truc de son côté.)


Time Machine Editor est téléchargeable ici.

Edit: l’ami Daniel me recommande aussi TimeMachineScheduler qui fait sensiblement la même chose. Ce dernier ne nécessite pas de devoir désactiver la Time Machine et s’intègre dans les préférences système de l’OS.

How to set up iCloud services in Snow Leopard

28/01/2014 Comments off
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Source: by Topher Kessler

While Apple’s iCloud services are officially supported only in OS X 10.7 Lion or later, you can get some working in Snow Leopard.

iCloud is the latest iteration of Apple’s cloud-based services, and while it can be accessed from any Web browser, it requires at least OS X 10.7 to integrate into the Mac OS. Unfortunately this means that if you are on an older Mac system running Snow Leopard that you either don’t want to or can’t upgrade, then Apple no longer supports accessing its iCloud services.

Recently MacFixIt reader Brandon wrote in wondering about the options for people with these setups:

I just purchased an iPhone and am trying to sync my Mac devices, but have run into a problem. I currently have an iMac 4,1 version 10.6.8 with a 2 GHz Intel Core Duo processor. In order to sync my devices with iCloud, I was told (by Apple) that I need to upgrade to Lion, at least.

[How can I get iCloud on my computer?] My ultimate goal is to have my work computer synced with my iPhone synced with my MacBook at home. Can I purchase and install the Intel Core 2 Duo processor I apparently need [to run Lion]? Are there any ways around this issue? Perhaps there is a cheaper component I could buy?

Upgrading the iMac‘s hardware would theoretically be possible, except that Apple’s iMac systems are soldered together, making it impossible to perform tasks like upgrading the CPU. They also do not have any standardized expansion slots, so upgrading components like video cards is also impossible. Even if you were able to upgrade the hardware and get Lion or Mountain Lion running, the system would not have been tested and could have stability problems.

The only components that can be upgraded on systems like the iMac are the removable RAM modules, the hard drive, and the optical drive. As a result, in most cases a Mac system that does not meet the minimum CPU and graphics requirements will not be able to run Lion or Mountain Lion, regardless of what you do.

Therefore, the only supported method for accessing iCloud services on older systems that can only run Snow Leopard is to use Apple’s iCloud Web interface; however, there are ways you can set up programs like Safari, Address Book, and iCal in unsupported ways to access iCloud services and make use of them.

Do keep in mind that these setups may not be the most reliable, but you can use the following steps to get the services to work in Snow Leopard and test them out with your phone.

Lire la suite…

Categories: Constructeur, Logiciel Tags: , ,